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Strukturbericht designation
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<h2 id="history">History</h2> <p>The designations were established by the journal <a href="/facts/Zeitschrift_f%25C3%25BCr_Kristallographie_%25E2%2580%2593_Crystalline_Materials/VRnhI287">Zeitschrift für Kristallographie – Crystalline Materials</a>, which published its first round of supplemental reviews under the name <i>Strukturbericht</i> from 1913-1928.<a class="footnote-ref" id="fnref:4" href="#fn:4"><sup>4</sup></a> These reports were collected into a book published in 1931 by <a href="/facts/Paul_Peter_Ewald/2IKqEFNe">Paul Peter Ewald</a> and <a href="/facts/Carl_Hermann/h7SubGE2">Carl Hermann</a> which became Volume 1 of <i>Strukturbericht</i>.<a class="footnote-ref" id="fnref:5" href="#fn:5"><sup>5</sup></a> While the series was continued after the war under the name <i>Structure reports</i>, which was published through 1990,<a class="footnote-ref" id="fnref:6" href="#fn:6"><sup>6</sup></a> the series stopped generating new symbols. Instead, some new additional designations were given in books by Smithels,<a class="footnote-ref" id="fnref:7" href="#fn:7"><sup>7</sup></a> and Pearson.<a class="footnote-ref" id="fnref:8" href="#fn:8"><sup>8</sup></a> </p><p>For the first volume, the designation consisted of a capital letter (A,B,C,D,E,F,G,H,L,M,O) specifying a broad category of compounds, and then a number to specify a particular crystal structure. In the second volume, subscript numbers were added, some early symbols were modified (e.g. what was initially D1 became D01, noted in the tables below as "D1 → D01"), and the categories were modified (types I,K,S were added). In the third volume, the class I was renamed J. Later designations began to use a lower case letter in subscripts as well.<a class="footnote-ref" id="fnref:9" href="#fn:9"><sup>9</sup></a> </p> <h2 id="a-compounds">A-compounds</h2> <p>The 'A' compounds are reserved for structures made up of atoms of all the same <a href="/facts/Chemical_element/0jducgWD">chemical element</a>. </p> A compounds<table><tbody><tr><th>Strukturbericht designation</th><th>Diagram</th><th>Prototype</th><th>Space group</th><th>Description</th></tr><tr><td>A1</td><td></td><td>Cu</td><td>Fm3m</td><td><a href="/facts/Close-packing_of_equal_spheres/AqL1HUxe">Cubic close-packed structure</a> (also: Face-centered cubic structure)</td></tr><tr><td>A2</td><td></td><td>W</td><td>Im3m</td><td><a href="/facts/Body-centered_cubic/92Co7BKM">Body-centered cubic</a> structure</td></tr><tr><td>A3</td><td></td><td>Mg</td><td>P63/mmc</td><td><a href="/facts/Close-packing_of_equal_spheres/AqL1HUxe">Hexagonal close-packed structure</a></td></tr><tr><td>A3'</td><td></td><td>α-La</td><td>P63/mmc</td><td>α-La structure<p>(ABAC <a href="/facts/Close-packing_of_equal_spheres/AqL1HUxe">Barlow packing</a>)</p></td></tr><tr><td>A4</td><td></td><td>C (diamond)</td><td>Fd3m</td><td><a href="/facts/Diamond_cubic/6dK7DpGB">Diamond cubic</a> structure</td></tr><tr><td>A5</td><td></td><td>β-Sn</td><td>I41/amd</td><td></td></tr><tr><td>A6</td><td></td><td>Indium</td><td>I4/mmm</td><td><a href="/facts/Indium/zRq3stVb">Indium</a> structure</td></tr><tr><td>A7</td><td></td><td>α-As</td><td>R3m</td><td></td></tr><tr><td>A8</td><td></td><td>gray Se</td><td>P3121</td><td>Also called γ-Se,but that term is also usedfor a monoclinic form.</td></tr><tr><td>A9</td><td></td><td>C (graphite)</td><td>P63/mmc</td><td><a href="/facts/Graphite/sSf3KMXr">Hexagonal graphite</a> structure</td></tr><tr><td>A10</td><td></td><td>α-Hg</td><td>R3m</td><td></td></tr><tr><td>A11</td><td></td><td>α-Ga</td><td>Cmca</td><td>α-<a href="/facts/Gallium/EucevDs9">Gallium</a> structure</td></tr><tr><td>A12</td><td></td><td>α-Mn</td><td>I43m</td><td>α-<a href="/facts/Manganese/j9ELd1TL">Manganese</a> structure</td></tr><tr><td>A13</td><td></td><td>β-Mn</td><td>P4132</td><td>β-<a href="/facts/Manganese/j9ELd1TL">Manganese</a> structure</td></tr><tr><td>A14</td><td></td><td>I2</td><td>Cmca</td><td>Molecular iodine structure</td></tr><tr><td><a href="/facts/A15_phases/I199cR4x">A15</a></td><td></td><td><a href="/facts/Beta-Tungsten/fSR7gN89">β-W</a></td><td>Pm3n</td><td><a href="/facts/Weaire%25E2%2580%2593Phelan_structure/QoXHtJDk">Weaire–Phelan structure</a></td></tr><tr><td>A16</td><td></td><td>α-S</td><td>Fddd</td><td></td></tr><tr><td>A17</td><td></td><td>P</td><td>Cmca</td><td><a href="/facts/Allotropes_of_phosphorus/GarX3byj">Black phosphorus structure</a></td></tr><tr><td>A18</td><td></td><td>Cl</td><td>P42/ncm</td><td>Incorrect structure<a class="footnote-ref" id="fnref:10" href="#fn:10"><sup>10</sup></a></td></tr><tr><td>A19 → Ai, Ah</td><td></td><td>Po (incorrectly)</td><td>C2</td><td></td></tr><tr><td>A20</td><td></td><td>α-U</td><td>Cmcm</td><td></td></tr><tr><td>Aa</td><td></td><td>α-Pa</td><td>I4/mmm</td><td></td></tr><tr><td>Ab</td><td></td><td>β-U</td><td>P42/mnm</td><td><a href="/facts/Frank%25E2%2580%2593Kasper_phases/WuEkYTva">σ phase</a></td></tr><tr><td>Ac</td><td></td><td>α-Np</td><td>Pnma</td><td></td></tr><tr><td>Ad</td><td></td><td>β-Np</td><td>P4/nmm</td><td></td></tr><tr><td>Af</td><td></td><td>γ-HgSn6-10</td><td>P6/mmm</td><td></td></tr><tr><td>Ag</td><td></td><td>B</td><td>P42/nnm</td><td></td></tr><tr><td>Ah</td><td></td><td>α-Po</td><td>Pm3m</td><td><a href="/facts/Simple_cubic/92Co7BKM">Simple cubic</a> structure</td></tr><tr><td>Ai</td><td></td><td>β-Po</td><td>R3m</td><td></td></tr><tr><td>Ak</td><td></td><td>γ-monoclinic Se</td><td>P21/c</td><td></td></tr><tr><td>Al</td><td></td><td>β-monoclinic Se</td><td>P21/c</td><td></td></tr></tbody></table> <h2 id="b-compounds">B-compounds</h2> <p>'B' designates compounds of two elements with equal numbers of atoms. </p> B compounds<table><tbody><tr><th>Strukturbericht designation</th><th>Diagram</th><th>Prototype</th><th>Space group</th><th>Description</th></tr><tr><td>B1</td><td></td><td>NaCl</td><td>Fm3m</td><td>Rock salt structure</td></tr><tr><td>B2</td><td></td><td>CsCl</td><td>Pm3m</td><td>caesium chloride structure</td></tr><tr><td>B3</td><td></td><td>ZnS</td><td>F43m</td><td>Zincblende structure</td></tr><tr><td>B4</td><td></td><td>ZnS</td><td>P63mc</td><td><a href="/facts/Wurtzite_crystal_structure/dJLTu9SB">Wurtzite crystal structure</a></td></tr><tr><td>B5</td><td></td><td>4H SiC</td><td>P63mc</td><td><a href="/facts/Moissanite/9nWp54pl">Moissanite</a> (4H <a href="/facts/Polymorphism_(materials_science)/bu2tqsB9">polytype</a>) structure</td></tr><tr><td>B6</td><td></td><td>6H SiC</td><td>P63mc</td><td><a href="/facts/Moissanite/9nWp54pl">Moissanite</a>(6H <a href="/facts/Polymorphism_(materials_science)/bu2tqsB9">polytype</a>) structure</td></tr><tr><td>B7</td><td></td><td>Si-C 15R</td><td>R3m</td><td>15R-<a href="/facts/Polymorphs_of_silicon_carbide/BeHlMgDe">SiC</a> structure</td></tr><tr><td>B8 → B81</td><td></td><td></td><td></td><td></td></tr><tr><td>B81</td><td></td><td>NiAs</td><td>P63/mmc</td><td><a href="/facts/Nickeline/fbXdeD92">Nickeline</a> structure</td></tr><tr><td>B82</td><td></td><td>Ni2In</td><td>P63/mmc</td><td></td></tr><tr><td>B9</td><td></td><td>α-HgS</td><td>P3221</td><td><a href="/facts/Cinnabar/MUzsHjFw">Cinnabar</a> structure</td></tr><tr><td>B10</td><td></td><td>PbO</td><td>P4/nmm</td><td><a href="/facts/Lead(II)_oxide/ekk8cog0">Lead(II) oxide</a>/<a href="/facts/Litharge/qCyjHJ83">Litharge</a> structure</td></tr><tr><td>B11</td><td></td><td>γ-CuTi</td><td>P4/nmm</td><td></td></tr><tr><td>B12 → Bk</td><td></td><td>BN (incorrectly)<a class="footnote-ref" id="fnref:11" href="#fn:11"><sup>11</sup></a></td><td>P63mc</td><td>Originally reported <a href="/facts/Boron_nitride/kumlPQRg">boron nitride</a> structure</td></tr><tr><td>B13</td><td></td><td>β-NiS</td><td>R3m</td><td>β-<a href="/facts/Nickel_sulfide/2UWCgMew">Nickel sulfide</a>/<a href="/facts/Millerite/a14wdgra">Millerite</a> structure</td></tr><tr><td>B14</td><td></td><td>FeAs</td><td>Pnma</td><td>Westerveldite structure</td></tr><tr><td>B15 → B27</td><td></td><td></td><td></td><td></td></tr><tr><td>B16</td><td></td><td>GeS</td><td>Pnma</td><td><a href="/facts/Germanium(II)_sulfide/o6FYtzxm">Germanium(II) sulfide</a>/Herzenbergite structure</td></tr><tr><td>B17</td><td></td><td>PtS</td><td>P42/mmc</td><td><a href="/facts/Platinum(II)_sulfide/1aj1mV0L">Platinum(II) sulfide</a>/<a href="/facts/Cooperite_(mineral)/ErvFDce0">Cooperite</a> structure</td></tr><tr><td>B18</td><td></td><td>CuS</td><td>P63/mmc</td><td><a href="/facts/Copper_monosulfide/vYzbUso6">Copper monosulfide</a>/<a href="/facts/Covellite/JaELPIEw">Covellite</a> structure</td></tr><tr><td>B19</td><td></td><td>β′-AuCd</td><td>Pmma</td><td>The <a href="/facts/Martensite/xpSt9mna">martensitic</a> β′-AuCd structure</td></tr><tr><td>B20</td><td></td><td>FeSi</td><td>P213</td><td>FeSi/<a href="/facts/Fersilicite/sWThf3m0">Fersilicite</a> structure</td></tr><tr><td>B21</td><td></td><td>α-CO</td><td>P213</td><td>α-<a href="/facts/Carbon_monoxide/CKuLtEMJ">Carbon monoxide</a> structure</td></tr><tr><td>B24</td><td></td><td>TlF-II (incorrectly)<a class="footnote-ref" id="fnref:12" href="#fn:12"><sup>12</sup></a></td><td>Fmmm</td><td>Originally reported <a href="/facts/Thallium(I)_fluoride/vs0ynPHD">Thallium(I) fluoride</a> structure</td></tr><tr><td>B26</td><td></td><td>CuO</td><td>C2/c</td><td><a href="/facts/Copper(II)_oxide/62mUJlpm">Copper(II) oxide</a>/<a href="/facts/Tenorite/luwtRvF1">Tenorite</a> structure</td></tr><tr><td>B27</td><td></td><td>FeB</td><td>Pnma</td><td><a href="/facts/Iron_boride/fKIGlKEb">Iron boride</a> structure</td></tr><tr><td>B28 → B20</td><td></td><td></td><td></td><td></td></tr><tr><td>B29 → B16</td><td></td><td>SnS (incorrectly)</td><td>Pnma</td><td><a href="/facts/Tin(II)_sulfide/bWpDCBBQ">Tin(II) sulfide</a> structure</td></tr><tr><td>B30</td><td></td><td>MgZn</td><td>Imm2</td><td></td></tr><tr><td>B31 → B14</td><td></td><td>MnP</td><td>Pnma</td><td></td></tr><tr><td>B32</td><td></td><td>NaTl</td><td>Fd3m</td><td></td></tr><tr><td>B33</td><td></td><td>CrB</td><td>Cmcm</td><td><a href="/facts/Chromium(III)_boride/z9r0mwv2">Chromium(III) boride</a> structure</td></tr><tr><td>B34</td><td></td><td>PdS</td><td>P42/m</td><td>Palladium(II) sulfide structure</td></tr><tr><td>B35</td><td></td><td>CoSn</td><td>P6/mmm</td><td></td></tr><tr><td>B37</td><td></td><td>SeTl</td><td>I4/mcm</td><td></td></tr><tr><td>Ba</td><td></td><td>CoU</td><td>I213</td><td></td></tr><tr><td>Bb</td><td></td><td>ζ-AgZn</td><td>P3</td><td></td></tr><tr><td>Bc → B33</td><td></td><td>CaSi</td><td>Cmcm</td><td></td></tr><tr><td>Bd</td><td></td><td>η-NiSi</td><td></td><td></td></tr><tr><td>Be</td><td></td><td>CdSb</td><td>Pbca</td><td></td></tr><tr><td>Bf → B33</td><td></td><td>CrB</td><td></td><td>(duplicate of B33)</td></tr><tr><td>Bg</td><td></td><td>MoB</td><td>I41/amd</td><td>Molybdenum boride structure</td></tr><tr><td>Bh</td><td></td><td>WC</td><td>P6m2</td><td><a href="/facts/Tungsten_carbide/2w0zcaWJ">Tungsten carbide</a> structure</td></tr><tr><td>Bi</td><td></td><td>AsTi</td><td>P63/mmc</td><td></td></tr><tr><td>Bk</td><td></td><td>BN</td><td>P63/mmc</td><td><a href="/facts/Boron_nitride/kumlPQRg">Boron nitride</a> structure</td></tr><tr><td>Bl</td><td></td><td>AsS</td><td></td><td></td></tr><tr><td>Bm</td><td></td><td>TiB</td><td></td><td></td></tr></tbody></table> <h2 id="c-compounds">C-compounds</h2> <p>'C' designates compounds of the stoichiometry AB2. </p> C compounds<table><tbody><tr><th>Strukturbericht designation</th><th>Diagram</th><th>Prototype</th><th>Space group</th><th>Description</th></tr><tr><td>C1</td><td></td><td><a href="/facts/Fluorite/y2G7C8zk">CaF2</a></td><td>Fm3m</td><td><a href="/facts/Fluorite_structure/5fAEzU1z">Fluorite structure</a></td></tr><tr><td>C1b</td><td></td><td>AgAsMg</td><td>F43m</td><td><a href="/facts/Heusler_compound/12ro9MxT">Half Heusler</a> structure</td></tr><tr><td>C2</td><td></td><td>FeS2</td><td>Pa3</td><td><a href="/facts/Pyrite/41CYREyr">Pyrite</a> structure</td></tr><tr><td>C3</td><td></td><td>Cu2O</td><td>Pn3m</td><td><a href="/facts/Cuprite/WdFFUXo2">Cuprite</a> structure</td></tr><tr><td>C4</td><td></td><td>TiO2</td><td>P42/mnm</td><td><a href="/facts/Rutile/qwJH5ElN">Rutile</a> structure</td></tr><tr><td>C5</td><td></td><td>TiO2</td><td>I41/amd</td><td><a href="/facts/Anatase/wD932gCW">Anatase</a> structure</td></tr><tr><td>C6</td><td></td><td>CdI2</td><td>P3m1</td><td><a href="/facts/Cadmium_iodide/kmYqUThz">Cadmium iodide structure</a></td></tr><tr><td>C7</td><td></td><td>MoS2</td><td>P63/mmc</td><td><a href="/facts/Molybdenum_disulfide/4TRft6Ua">Molybdenum disulfide</a> structure</td></tr><tr><td>C8</td><td></td><td>β-SiO2</td><td>P6222</td><td>β-<a href="/facts/Quartz/4n86tE2G">Quartz</a> structure</td></tr><tr><td>C9</td><td></td><td>β-Cristobalite</td><td>Fd3m</td><td>Idealized β-<a href="/facts/Cristobalite/r1rQss4r">Cristobalite</a> structure</td></tr><tr><td>C10</td><td></td><td>β-Tridymite</td><td>P63/mmc</td><td>β-<a href="/facts/Tridymite/GKBVUXRe">Tridymite</a> structure</td></tr><tr><td>C11 → C11a,C11b</td><td></td><td></td><td></td><td></td></tr><tr><td>C11a</td><td></td><td>CaC2</td><td>I4/mmm</td><td></td></tr><tr><td>C11b</td><td></td><td>MoSi2</td><td>I4/mmm</td><td><a href="/facts/Molybdenum_disilicide/lzpJNdxB">Molybdenum disilicide</a> structure</td></tr><tr><td>C12</td><td></td><td>CaSi2</td><td>R3m</td><td></td></tr><tr><td>C13</td><td></td><td>HgI2</td><td>P42/nmc</td><td><a href="/facts/Coccinite/SJXBUADg">Coccinite</a> structure</td></tr><tr><td>C14</td><td></td><td>MgZn2</td><td>P63/mmc</td><td>MgZn2 <a href="/facts/Laves_phase/usmGNgRl">Laves phase</a></td></tr><tr><td>C15</td><td></td><td><a href="/facts/MgCu2/gEAugtbS">MgCu2</a></td><td>Fd3m</td><td>MgCu2 <a href="/facts/Laves_phase/usmGNgRl">Laves phase</a></td></tr><tr><td>C15b</td><td></td><td>AuBe5</td><td>F43m</td><td></td></tr><tr><td>C16</td><td></td><td>CuAl2</td><td>I4/mcm</td><td><a href="/facts/Khatyrkite/8lNYJXhq">Khatyrkite</a> structure</td></tr><tr><td>C18</td><td></td><td>FeS2</td><td>Pnnm</td><td><a href="/facts/Marcasite/vP4CW3QC">Marcasite</a> structure</td></tr><tr><td>C19</td><td></td><td>α-Sm</td><td>R3m</td><td>α-<a href="/facts/Samarium/09K3kl93">Samarium</a> structure<p>(ABCBCACAB <a href="/facts/Close-packing_of_equal_spheres/AqL1HUxe">Barlow packing</a>)</p></td></tr><tr><td>C21</td><td></td><td>TiO2</td><td>Pbca</td><td><a href="/facts/Brookite/RAHb2XFS">Brookite</a> structure</td></tr><tr><td>C22</td><td></td><td>Fe2P</td><td>P321 (original, incorrect structure) P62m (revised)</td><td></td></tr><tr><td>C23</td><td></td><td>PbCl2</td><td>Pnma</td><td><a href="/facts/Cotunnite/YLtTSI1l">Cotunnite</a> structure</td></tr><tr><td>C24</td><td></td><td>HgBr2</td><td>Cmc21</td><td><a href="/facts/Mercury(II)_bromide/egsfBaI4">Mercury(II) bromide</a> structure</td></tr><tr><td>C25 → C28</td><td></td><td>HgCl2</td><td>Pnma</td><td><a href="/facts/Mercury(II)_chloride/aUAKsq6a">Mercury(II) chloride</a> structure</td></tr><tr><td>C27</td><td></td><td>CdI2</td><td>P63mc</td><td></td></tr><tr><td>C28</td><td></td><td>HgCl2</td><td></td><td></td></tr><tr><td>C29 → C23</td><td></td><td>SrH2</td><td>Pnma</td><td><a href="/facts/Strontium_hydride/DgeX3f1h">Strontium hydride</a> structure</td></tr><tr><td>C30</td><td></td><td>SiO2</td><td>P41212</td><td>α–<a href="/facts/Cristobalite/r1rQss4r">Cristobalite</a> structure</td></tr><tr><td>C32</td><td></td><td>AlB2</td><td>P6/mmm</td><td><a href="/facts/Aluminium_diboride/DRjf2WeX">Aluminium diboride</a> structure</td></tr><tr><td>C33</td><td></td><td>Bi2Te3</td><td>R3m</td><td><a href="/facts/Bismuth_telluride/8395lR2v">Bismuth telluride</a> structure</td></tr><tr><td>C34</td><td></td><td>AuTe2</td><td>C2/m</td><td></td></tr><tr><td>C35</td><td></td><td>CaCl2</td><td>Pnnm</td><td><a href="/facts/Calcium_chloride/e1EwNPGF">Calcium chloride</a> structure</td></tr><tr><td>C36</td><td></td><td>MgNi2</td><td>P63/mmc</td><td>MgNi2 <a href="/facts/Laves_phase/usmGNgRl">Laves phase</a></td></tr><tr><td>C37</td><td></td><td>Co2Si</td><td>Pnma</td><td></td></tr><tr><td>C38</td><td></td><td>Cu2Sb</td><td>P4/nmm</td><td></td></tr><tr><td>C39 → C15</td><td></td><td></td><td></td><td></td></tr><tr><td>C40</td><td></td><td>CrSi2</td><td>P6222</td><td></td></tr><tr><td>C41 → C14</td><td></td><td></td><td></td><td></td></tr><tr><td>C42</td><td></td><td>SiS2</td><td>Ibam</td><td><a href="/facts/Silicon_disulfide/NsydQecc">Silicon disulfide</a> structure</td></tr><tr><td>C43</td><td></td><td>ZrO2</td><td>P21/c</td><td><a href="/facts/Baddeleyite/Ddl3jetz">Baddeleyite</a> structure</td></tr><tr><td>C44</td><td></td><td>GeS2</td><td>Fdd2</td><td><a href="/facts/Germanium_disulfide/SbeJTv2X">Germanium disulfide</a> structure</td></tr><tr><td>C46</td><td></td><td>AuTe2</td><td>Pma2</td><td><a href="/facts/Krennerite/KDJdsux9">Krennerite</a> structure</td></tr><tr><td>C47</td><td></td><td>SeO2</td><td>P42/mbc</td><td><a href="/facts/Selenium_dioxide/naIqT939">Selenium dioxide</a> structure</td></tr><tr><td>C48 → C11b</td><td></td><td></td><td></td><td></td></tr><tr><td>C49</td><td></td><td>ZrSi2</td><td>Cmcm</td><td></td></tr><tr><td>C50</td><td></td><td>PdCl2</td><td>Pnnm</td><td>α-<a href="/facts/Palladium(II)_chloride/ECyezouw">Palladium(II) chloride</a> structure</td></tr><tr><td>C51 → C16</td><td></td><td></td><td></td><td></td></tr><tr><td>C53</td><td></td><td>Sr Br2</td><td>P4/n</td><td></td></tr><tr><td>C54</td><td></td><td>TiSi2</td><td>Fddd</td><td><a href="/facts/Titanium_disilicide/gBWH22fQ">Titanium disilicide</a> structure</td></tr><tr><td>Ca</td><td></td><td>Mg2Ni</td><td>P6222</td><td></td></tr><tr><td>Cb</td><td></td><td>CuMg2</td><td>Fddd</td><td></td></tr><tr><td>Cc</td><td></td><td>ThSi2</td><td>I41/amd</td><td></td></tr><tr><td>Ce</td><td></td><td>PdSn2</td><td>Aba2</td><td></td></tr><tr><td>Cg</td><td></td><td>ThC2</td><td>C2/c</td><td></td></tr><tr><td>Ch</td><td></td><td>Cu2Te</td><td>P6/mmm</td><td></td></tr><tr><td>Ck</td><td></td><td>LiZn2</td><td></td><td></td></tr></tbody></table> <h2 id="d-compounds">D-compounds</h2> <p>'D' designates compounds of arbitrary stoichiometry. Originally, D1-D10 were set aside for stoichiometry AB3, D11-D20 for stoichiometry ABn for n > 3, D31-D50 for (ABn)2, and D51 up for the AmBn for arbitrary m and n.<a class="footnote-ref" id="fnref:13" href="#fn:13"><sup>13</sup></a> </p> D compounds<table><tbody><tr><th>Strukturbericht designation</th><th>Diagram</th><th>Prototype</th><th>Space group</th><th>Description</th></tr><tr><td>D02</td><td></td><td>CoAs3</td><td>Im3</td><td><a href="/facts/Skutterudite/0S7nBlCI">Skutterudite</a> structure</td></tr><tr><td>D03</td><td></td><td>BiF3</td><td>Fm3m</td><td><a href="/facts/Bismuth_trifluoride/FnQdg1A2">Bismuth trifluoride</a> structure</td></tr><tr><td>D04</td><td></td><td>CrCl3</td><td>P3112</td><td><a href="/facts/Chromium(III)_chloride/1GwXxIFm">Chromium(III) chloride</a> structure</td></tr><tr><td>D05</td><td></td><td>BiI3</td><td>R3</td><td><a href="/facts/Bismuth(III)_iodide/qap1BoQB">Bismuth(III) iodide</a> structure</td></tr><tr><td>D06</td><td></td><td>LaF3</td><td>P3c1</td><td><a href="/facts/Lanthanum_trifluoride/uYAvd936">Lanthanum trifluoride</a>/<a href="/facts/Fluocerite/BNC8IKy6">Fluocerite</a> structure</td></tr><tr><td>D09</td><td></td><td>α-ReO3</td><td>Pm3m</td><td>α-<a href="/facts/Rhenium_trioxide/tdPWUM81">Rhenium trioxide</a> structure</td></tr><tr><td>D011</td><td></td><td>Fe3C</td><td>Pnma</td><td><a href="/facts/Cementite/BvMdo027">Cementite</a> structure</td></tr><tr><td>D012</td><td></td><td>FeF3</td><td>R3c</td><td></td></tr><tr><td>D014 → D012</td><td></td><td>AlF3</td><td>R32</td><td><a href="/facts/Aluminium_fluoride/psF0WEqn">Aluminium fluoride</a> structure</td></tr><tr><td>D015</td><td></td><td>AlCl3</td><td>C2/m</td><td><a href="/facts/Aluminium_chloride/xrhvSxDr">Aluminium chloride</a> structure</td></tr><tr><td>D017</td><td></td><td>BaS3</td><td>P421m</td><td></td></tr><tr><td>D018</td><td></td><td>Na3As</td><td>P63/mmc</td><td><a href="/facts/Sodium_arsenide/hA3YGvSB">Sodium arsenide</a> structure</td></tr><tr><td>D019</td><td></td><td>Ni3Sn</td><td>P63/mmc</td><td></td></tr><tr><td>D020</td><td></td><td>Al3Ni</td><td>Pnma</td><td></td></tr><tr><td>D021</td><td></td><td>Cu3P</td><td>P3c1 (original structure)P63cm (revised)</td><td><a href="/facts/Copper(I)_phosphide/6EtxNqQQ">Copper(I) phosphide</a> structure</td></tr><tr><td>D022</td><td></td><td>Al3Ti</td><td>I4/mmm</td><td></td></tr><tr><td>D023</td><td></td><td>Al3Zr</td><td>I4/mmm</td><td></td></tr><tr><td>D024</td><td></td><td>Ni3Ti</td><td>P63/mmc</td><td></td></tr><tr><td>D0a</td><td></td><td>β-TiCu3</td><td>Pmmn</td><td></td></tr><tr><td>D0c → D0'c</td><td></td><td>SiU3</td><td>I4/mcm</td><td></td></tr><tr><td>D0'c</td><td></td><td>Ir3Si</td><td>I4/mcm</td><td></td></tr><tr><td>D0d</td><td></td><td>AsMn3</td><td>Cmcm</td><td></td></tr><tr><td>D0e</td><td></td><td>Ni3P</td><td>I4</td><td></td></tr><tr><td>D1</td><td></td><td>NH3</td><td>P213</td><td></td></tr><tr><td>D12</td><td></td><td>SiF4</td><td>I43m</td><td><a href="/facts/Silicon_tetrafluoride/hu4H1Ja2">Silicon tetrafluoride</a> structure</td></tr><tr><td>D13</td><td></td><td>Al4Ba</td><td>I4/mmm</td><td></td></tr><tr><td>D1a</td><td></td><td>Ni4Mo</td><td>I4/m</td><td></td></tr><tr><td>D1b</td><td></td><td>Al4U</td><td>Imma</td><td></td></tr><tr><td>D1c</td><td></td><td>PtSn4</td><td>Aba2</td><td></td></tr><tr><td>D1d</td><td></td><td>Pb4Pt</td><td>P4/nbm</td><td></td></tr><tr><td>D1e</td><td></td><td>B4Th</td><td>P4/mbm</td><td><a href="/facts/Compounds_of_thorium/eoLge0vu">B4Th</a> structure</td></tr><tr><td>D1f → Cb</td><td></td><td>Mn4B</td><td></td><td></td></tr><tr><td>D1g</td><td></td><td>B4C</td><td></td><td></td></tr><tr><td>D2 → D02</td><td></td><td></td><td></td><td></td></tr><tr><td>D21</td><td></td><td>CaB6</td><td>Pm3m</td><td><a href="/facts/Calcium_hexaboride/toBN27Js">Calcium hexaboride</a> structure</td></tr><tr><td>D23</td><td></td><td>NaZn13</td><td>Fm3c</td><td></td></tr><tr><td>D2b</td><td></td><td>Mn12Th</td><td>I4/mmm</td><td></td></tr><tr><td>D2c</td><td></td><td>MnU6</td><td>I4/mcm</td><td></td></tr><tr><td>D2d</td><td></td><td>CaCu5</td><td>P6/mmm</td><td></td></tr><tr><td>D2e</td><td></td><td>BaHg11</td><td>Pm3</td><td></td></tr><tr><td>D2f</td><td></td><td>UB12</td><td>Fm3m</td><td></td></tr><tr><td>D2g</td><td></td><td>Fe8N</td><td>I4/mmmm</td><td></td></tr><tr><td>D2h</td><td></td><td>Al6Mn</td><td>Cmcm</td><td></td></tr><tr><td>D31</td><td></td><td>Hg2Cl2</td><td>I4/mmm</td><td><a href="/facts/Calomel/0fucDWnb">Calomel</a> structure</td></tr><tr><td>D51</td><td></td><td>Al2O3</td><td>R3c</td><td>Corrundum structure</td></tr><tr><td>D52</td><td></td><td>La2O3</td><td>P3m1</td><td></td></tr><tr><td>D53</td><td></td><td>Mn2O3</td><td>Ia3</td><td><a href="/facts/Manganese(III)_oxide/9k30TI1l">Manganese(III) oxide</a>/<a href="/facts/Bixbyite/1pWDBBuD">Bixbyite</a> structure</td></tr><tr><td>D54</td><td></td><td>Sb2O3</td><td>Fd3m</td><td></td></tr><tr><td>D55</td><td></td><td>Ag2O3</td><td>Pn3m</td><td></td></tr><tr><td>D58</td><td></td><td>Sb2S3</td><td>Pnma</td><td><a href="/facts/Antimony_trisulfide/Y9q8h4c7">Antimony trisulfide</a>/<a href="/facts/Stibnite/f1wo26vQ">Stibnite</a> structure</td></tr><tr><td>D59</td><td></td><td>Zn3Pt2</td><td>P42/nmc</td><td></td></tr><tr><td>D510</td><td></td><td>Cr3C2</td><td>Pnma</td><td></td></tr><tr><td>D511</td><td></td><td>Sb2O3</td><td>Pccn</td><td><a href="/facts/Antimony_trioxide/b3LraQvL">Antimony trioxide</a>/<a href="/facts/Valentinite/jtPcryVu">Valentinite</a> structure</td></tr><tr><td>D512</td><td></td><td>β–Bi2O3</td><td></td><td></td></tr><tr><td>D513</td><td></td><td>Al3Ni2</td><td>P3m1</td><td></td></tr><tr><td>D5a</td><td></td><td>Si2U3</td><td>P4/mbm</td><td></td></tr><tr><td>D5b</td><td></td><td>Pt2Sn3</td><td>P63/mmc</td><td></td></tr><tr><td>D5c</td><td></td><td>Pu2C3</td><td>I43d</td><td></td></tr><tr><td>D5e</td><td></td><td>Ni3S2</td><td>R32</td><td>Nickel subsulfide/<a href="/facts/Heazlewoodite/hUtfmgbN">Heazlewoodite</a> structure</td></tr><tr><td>D5f</td><td></td><td>As2S3</td><td>P21/n</td><td><a href="/facts/Arsenic_trisulfide/Tns91XN9">Arsenic trisulfide</a> structure</td></tr><tr><td>D71</td><td></td><td>Al4C3</td><td>R3m</td><td><a href="/facts/Aluminium_carbide/Mo2rT6RD">Aluminium carbide</a> structure</td></tr><tr><td>D72</td><td></td><td>Co3S4</td><td>Fd3m</td><td></td></tr><tr><td>D73</td><td></td><td>Th3P4</td><td>I43d</td><td><a href="/facts/Compounds_of_thorium/eoLge0vu">Th3P4</a> structure</td></tr><tr><td>D7a</td><td></td><td>𝛿-Ni3Sn4</td><td></td><td></td></tr><tr><td>D7b</td><td></td><td>Ta3B4</td><td>Immm</td><td></td></tr><tr><td>D81</td><td></td><td>Fe3Zn10</td><td>I43m</td><td></td></tr><tr><td>D82</td><td></td><td>Cu5Zn8</td><td>I43m</td><td>Gamma <a href="/facts/Brass/pe8EHk6x">brass</a> structure</td></tr><tr><td>D83</td><td></td><td>Cu9Al4</td><td>P43m</td><td></td></tr><tr><td>D84</td><td></td><td>Cr23C6</td><td>Fm3m</td><td><a href="/facts/Cr23C6_crystal_structure/KUPy7gbX">Cr23C6 crystal structure</a>/<a href="/facts/Chromium(II)_carbide/Vhj1ymbC">Chromium(II) carbide</a> structure</td></tr><tr><td>D85</td><td></td><td>Fe7W6</td><td>R3m</td><td></td></tr><tr><td>D86</td><td></td><td>Cu15Si4</td><td>I43d</td><td></td></tr><tr><td>D88</td><td></td><td>Mn5Si3</td><td>P63/mcm</td><td></td></tr><tr><td>D89</td><td></td><td>Co9S8</td><td>Fm3m</td><td></td></tr><tr><td>D810</td><td></td><td>Cr5Al8</td><td>R3m</td><td></td></tr><tr><td>D811</td><td></td><td>Co2Al5</td><td>P63/mmc</td><td></td></tr><tr><td>D8a</td><td></td><td>Mn23Th6,Cu16Mg6Si7<p>(G-phase)</p></td><td>Fm3m</td><td></td></tr><tr><td>D8b</td><td></td><td>σ-CrFe</td><td>P42/mnm</td><td></td></tr><tr><td>D8c</td><td></td><td>Mg2Zn11</td><td>Pm3</td><td></td></tr><tr><td>D8d</td><td></td><td>Co2Al9</td><td>P21/c</td><td></td></tr><tr><td>D8e</td><td></td><td>Mg32(Al,Zn)49</td><td>Im3</td><td></td></tr><tr><td>D8f</td><td></td><td>Ge7Ir3</td><td>Im3m</td><td></td></tr><tr><td>D8g</td><td></td><td>Ga2Mg5</td><td>Ibam</td><td></td></tr><tr><td>D8h</td><td></td><td>W2B5</td><td>P63/mmc</td><td></td></tr><tr><td>D8i</td><td></td><td>Mo2B5</td><td>R3m</td><td></td></tr><tr><td>D8k</td><td></td><td>Th7S12</td><td>P63/m</td><td></td></tr><tr><td>D8l</td><td></td><td>Cr5B4</td><td>I4/mcm</td><td></td></tr><tr><td>D8m</td><td></td><td>W5Si3</td><td>I4/mcm</td><td></td></tr><tr><td>D101</td><td></td><td>C3Cr7</td><td>Pnma</td><td></td></tr><tr><td>D102</td><td></td><td>Fe3Th7</td><td>P63mc</td><td></td></tr><tr><td>D31 → D31</td><td></td><td></td><td></td><td></td></tr><tr><td>D51 → D51</td><td></td><td></td><td></td><td></td></tr><tr><td>D52 → D52</td><td></td><td></td><td></td><td></td></tr><tr><td>D61 → D61</td><td></td><td></td><td></td><td></td></tr><tr><td>D81 → D81</td><td></td><td></td><td></td><td></td></tr><tr><td>D82 → D82</td><td></td><td></td><td></td><td></td></tr><tr><td>D83 → D83</td><td></td><td></td><td></td><td></td></tr></tbody></table> <h2 id="e-to-k-compounds">E to K compounds</h2> <p>Letters between 'E' and 'K' designate more complex compounds. </p> E through K compounds<table><tbody><tr><th>Strukturbericht designation</th><th>Diagram</th><th>Prototype</th><th>Space group</th><th>Description</th></tr><tr><td>E01</td><td></td><td>PbFCl</td><td>P4/nmm</td><td><a href="/facts/Matlockite/puYJW6Wa">Matlockite</a> structure</td></tr><tr><td>E03</td><td></td><td>CdOHCl</td><td>P63mc</td><td></td></tr><tr><td>E05</td><td></td><td>FeOCl</td><td></td><td><a href="/facts/Iron_oxychloride/q5AQxoEp">Iron oxychloride</a> structure</td></tr><tr><td>E07</td><td></td><td>FeAsS</td><td>P21/c</td><td><a href="/facts/Arsenopyrite/xnb3E9yK">Arsenopyrite</a> structure</td></tr><tr><td>E11</td><td></td><td>CuFeS2</td><td>I42d</td><td><a href="/facts/Chalcopyrite/MXBDffGw">Chalcopyrite</a> structure</td></tr><tr><td>E1a</td><td></td><td>MgCuAl2</td><td>Cmcm</td><td></td></tr><tr><td>E1b</td><td></td><td>AgAuTe4</td><td>P2/c</td><td><a href="/facts/Sylvanite/nYqIg2M6">Sylvanite</a> structure</td></tr><tr><td>E21</td><td></td><td>CaTiO3</td><td>Pm3m</td><td><a href="/facts/Perovskite_(structure)/Gu39aNyo">Perovskite structure</a></td></tr><tr><td>E22</td><td></td><td>FeTiO3</td><td>R3</td><td><a href="/facts/Ilmenite/fh2eXgpo">Ilmenite</a> structure</td></tr><tr><td>E24</td><td></td><td>NH4CdC13</td><td>Pnma</td><td></td></tr><tr><td>E3</td><td></td><td>CdAl2S4</td><td>I4</td><td></td></tr><tr><td>E33</td><td></td><td>FeSb2S4</td><td>Pnam</td><td><a href="/facts/Berthierite/artFYUTc">Berthierite</a> structure</td></tr><tr><td>E81</td><td></td><td>Eu2Ir2O7</td><td>Fd3m</td><td><a href="/facts/Pyrochlore/jxGjaSv8">Pyrochlore</a> structure</td></tr><tr><td>E91</td><td></td><td>Ca3Al2O6</td><td>Pm3m</td><td></td></tr><tr><td>E93</td><td></td><td>Fe3W3C</td><td>Fd3m</td><td></td></tr><tr><td>E94</td><td></td><td>Al5C3N</td><td>P63mc</td><td></td></tr><tr><td>E9a</td><td></td><td>Al7Cu2Fe</td><td>P4/mnc</td><td></td></tr><tr><td>E9b</td><td></td><td>Al8FeMg3Si6</td><td>P62m</td><td></td></tr><tr><td>E9c</td><td></td><td>Mn3Al9Si</td><td>P63/mmc</td><td></td></tr><tr><td>E9d</td><td></td><td>AlLi3N2</td><td>Ia3</td><td></td></tr><tr><td>E9e</td><td></td><td>CuFe2S3</td><td>Pnma</td><td><a href="/facts/Cubanite/fP3u9PWo">Cubanite</a> structure</td></tr><tr><td>F01</td><td></td><td>NiSSb</td><td>P213</td><td><a href="/facts/Ullmannite/VuwzkE3L">Ullmannite</a> structure</td></tr><tr><td>F02</td><td></td><td>COS</td><td>R3m</td><td><a href="/facts/Carbonyl_sulfide/dGbSdqBW">Carbonyl sulfide</a> structure</td></tr><tr><td>F51</td><td></td><td>CrNaS2</td><td>R3m</td><td></td></tr><tr><td>F52</td><td></td><td>KN3</td><td>I4/mcm</td><td></td></tr><tr><td>F54</td><td></td><td>NH4O2Cl</td><td>P421m</td><td></td></tr><tr><td>F56</td><td></td><td>CuSbS2</td><td>Pnma</td><td><a href="/facts/Chalcostibite/z9q14jR2">Chalcostibite</a> structure</td></tr><tr><td>F59</td><td></td><td>KCNS</td><td>Pbcm</td><td></td></tr><tr><td>F510</td><td></td><td>KAg(CN)2</td><td>P31c</td><td></td></tr><tr><td>F513</td><td></td><td>KBO2</td><td>R3c</td><td></td></tr><tr><td>F5a</td><td></td><td>FeKS2</td><td>C2/c</td><td></td></tr><tr><td>F51 → F51</td><td></td><td></td><td></td><td></td></tr><tr><td>F52 → F52</td><td></td><td></td><td></td><td></td></tr><tr><td>F61 → E11</td><td></td><td></td><td></td><td></td></tr><tr><td>G01</td><td></td><td>CaCO3</td><td>R3c</td><td><a href="/facts/Calcite/gKMHYQJo">Calcite</a> structure</td></tr><tr><td>G02</td><td></td><td>CaCO3</td><td>Pmcn</td><td><a href="/facts/Aragonite/QGcD3SLs">Aragonite</a> structure</td></tr><tr><td>G06</td><td></td><td>KClO3</td><td>P21/m</td><td></td></tr><tr><td>G3</td><td></td><td>NaClO3</td><td>P213</td><td><a href="/facts/Sodium_chlorate/FluP1Ast">Sodium chlorate</a> structure</td></tr><tr><td>G32</td><td></td><td>Na2SO3</td><td>P3</td><td><a href="/facts/Sodium_sulfite/gaj3QRU7">Sodium sulfite</a> structure</td></tr><tr><td>G4 → E22</td><td></td><td></td><td></td><td></td></tr><tr><td>G5 → E21</td><td></td><td></td><td></td><td></td></tr><tr><td>G71</td><td></td><td>CeCO3F</td><td>P62c</td><td><a href="/facts/Bastn%25C3%25A4site/wSaG43h8">Bastnäsite</a> structure</td></tr><tr><td>H01</td><td></td><td>CaSO4</td><td>Cmcm</td><td><a href="/facts/Anhydrite/66QvVbXV">Anhydrite</a> structure</td></tr><tr><td>H02</td><td></td><td>BaSO4</td><td>Pnma</td><td><a href="/facts/Baryte/G6frVDl5">Baryte</a> structure</td></tr><tr><td>H03 → S11</td><td></td><td></td><td></td><td></td></tr><tr><td>H05</td><td></td><td>KClO4</td><td>Pnma</td><td><a href="/facts/Potassium_perchlorate/h4KmomHk">Potassium perchlorate</a> structure</td></tr><tr><td>H07</td><td></td><td>BPO4</td><td>I4</td><td></td></tr><tr><td>H1 → H01</td><td></td><td></td><td></td><td></td></tr><tr><td>H11</td><td></td><td>Al2MgO4</td><td>Fd3m</td><td><a href="/facts/Spinel_group/yKVsD1aP">Spinel structure</a></td></tr><tr><td>H12 → S12</td><td></td><td></td><td></td><td></td></tr><tr><td>H13 → S13</td><td></td><td></td><td></td><td></td></tr><tr><td>H15</td><td></td><td>K2PtC14</td><td>P4/mmmm</td><td></td></tr><tr><td>H16</td><td></td><td>β-K2SO4</td><td>Pnma</td><td></td></tr><tr><td>H2 → H02</td><td></td><td></td><td></td><td></td></tr><tr><td>H21</td><td></td><td>Ag3PO4</td><td>P43n</td><td><a href="/facts/Silver_phosphate/nRmrpxYR">Silver phosphate</a> structure</td></tr><tr><td>H24</td><td></td><td>Cu3S4V</td><td>P43m</td><td></td></tr><tr><td>H25</td><td></td><td>AsCu3S4</td><td>Pmn21</td><td><a href="/facts/Enargite/9YNyGwye">Enargite</a> structure</td></tr><tr><td>H26</td><td></td><td>Cu2FeS4Sn</td><td>I42m</td><td><a href="/facts/Stannite/omKID2Cy">Stannite</a> structure</td></tr><tr><td>H3 → S11</td><td></td><td></td><td></td><td></td></tr><tr><td>H31 → S14</td><td></td><td></td><td></td><td></td></tr><tr><td>H4</td><td></td><td>CaWO4</td><td>I41/a</td><td><a href="/facts/Scheelite/Te4N0qKN">Scheelite</a> structure</td></tr><tr><td>H57</td><td></td><td>Ca5(PO4)3F,Cl,OH</td><td>P63/m</td><td><a href="/facts/Apatite/f5tYvl1n">Apatite</a> structure</td></tr><tr><td>H11 → H11</td><td></td><td></td><td></td><td></td></tr><tr><td>H12 → S12</td><td></td><td></td><td></td><td></td></tr><tr><td>H13 → S13</td><td></td><td></td><td></td><td></td></tr><tr><td>H15 → H15</td><td></td><td></td><td></td><td></td></tr><tr><td>H31 → S14</td><td></td><td></td><td></td><td></td></tr><tr><td>H61 → J11</td><td></td><td></td><td></td><td></td></tr><tr><td>I11 → J11</td><td></td><td></td><td></td><td></td></tr><tr><td>I113 → J113</td><td></td><td></td><td></td><td></td></tr><tr><td>J11</td><td></td><td>K2PtCl6</td><td>Fm3m</td><td></td></tr><tr><td>J113</td><td></td><td>K2GeF6</td><td>P3m1</td><td></td></tr><tr><td>K01</td><td></td><td>K2S2O5</td><td>P21/m</td><td></td></tr><tr><td>K11</td><td></td><td>KSO3</td><td>P321</td><td></td></tr><tr><td>K12</td><td></td><td>CsSO3</td><td>P63mc</td><td></td></tr><tr><td>K31</td><td></td><td>Cs3CoC15</td><td>I4/mcm</td><td></td></tr><tr><td>K41</td><td></td><td>NH4SO4</td><td>P21/c</td><td></td></tr></tbody></table> <h2 id="l-compounds">L-compounds</h2> <p>'L' designates <a href="/facts/Intermetallic_compounds/nnzksayl">intermetallic compounds</a>. </p> L compounds<table><tbody><tr><th>Strukturbericht designation</th><th>Diagram</th><th>Prototype</th><th>Space group</th><th>Description</th></tr><tr><td>L10</td><td></td><td>CuAu</td><td>P4/mmm</td><td></td></tr><tr><td>L11</td><td></td><td>CuPt</td><td>R3m</td><td></td></tr><tr><td>L12</td><td></td><td><a href="/facts/Auricupride/lA9X5SJb">Cu3Au</a></td><td>Pm3m</td><td>Cu3Au structure</td></tr><tr><td>L13</td><td></td><td>CdPt3</td><td>Cmmm</td><td></td></tr><tr><td>L1a</td><td></td><td>CuPt3</td><td></td><td></td></tr><tr><td>L21</td><td></td><td>AlCu2Mn</td><td>Fm3m</td><td><a href="/facts/Heusler_compound/12ro9MxT">Heusler compounds</a></td></tr><tr><td>L22</td><td></td><td>Sb2Tl7</td><td>Im3m</td><td></td></tr><tr><td>L2a</td><td></td><td>𝛿-CuTi</td><td>P4/mmm</td><td></td></tr><tr><td>L60</td><td></td><td>CuTi3</td><td>P4/mmm</td><td></td></tr><tr><td>L'1</td><td></td><td>Fe4N</td><td>Pm3m</td><td></td></tr><tr><td>L'12</td><td></td><td>AlF3C</td><td></td><td><a href="/facts/Perovskite/yM9ucFJ2">Perovskite</a> structure</td></tr><tr><td>L'2</td><td></td><td>ThH2</td><td>I4/mmm</td><td></td></tr><tr><td>L'2b</td><td></td><td>ThH2</td><td>I4/mmm</td><td></td></tr><tr><td>L'3 → B81</td><td></td><td>Fe2N</td><td></td><td></td></tr><tr><td>L'32</td><td></td><td>β-V2N</td><td>P31m</td><td></td></tr><tr><td>L60</td><td></td><td>Ti3Cu</td><td>P4/mmm</td><td></td></tr><tr><td>L10 → L10</td><td></td><td></td><td></td><td></td></tr><tr><td>L'10 → L'1</td><td></td><td></td><td></td><td></td></tr><tr><td>L11 → L11</td><td></td><td></td><td></td><td></td></tr><tr><td>L12 → L12</td><td></td><td></td><td></td><td></td></tr><tr><td>L13 → L13</td><td></td><td></td><td></td><td></td></tr><tr><td>L20 → B2</td><td></td><td></td><td></td><td></td></tr><tr><td>L'20 → L'2</td><td></td><td></td><td></td><td></td></tr><tr><td>L21 → L21</td><td></td><td></td><td></td><td></td></tr><tr><td>L22 → L22</td><td></td><td></td><td></td><td></td></tr></tbody></table> <h2 id="s-compounds">S-compounds</h2> S compounds<table><tbody><tr><th>Strukturbericht designation</th><th>Diagram</th><th>Prototype</th><th>Space group</th><th>Description</th></tr><tr><td>S11</td><td></td><td>ZrSiO4</td><td>I41/amd</td><td><a href="/facts/Zircon/84APfbLt">Zircon</a> structure</td></tr><tr><td>S12</td><td></td><td>Mg2SiO4</td><td>Pnma</td><td><a href="/facts/Forsterite/Qg1HDy5q">Forsterite</a> structure</td></tr><tr><td>S13</td><td></td><td>Be2SiO4</td><td>R3</td><td><a href="/facts/Phenakite/f7w8BeD5">Phenakite</a> structure</td></tr><tr><td>S14</td><td></td><td>Al2Ca3Si3O12</td><td>Ia3d</td><td><a href="/facts/Garnet/kqh2lWQI">Garnet</a> structure</td></tr><tr><td>S21</td><td></td><td>Sc2Si2O7</td><td>C2/m</td><td><a href="/facts/Thortveitite/jIv8boFy">Thortveitite</a> structure</td></tr><tr><td>S31</td><td></td><td>Be3Al2Si6O18</td><td>P6/mcc</td><td><a href="/facts/Beryl/Fl7q1Hl9">Beryl</a> structure</td></tr><tr><td>S32</td><td></td><td>BaSi4O9</td><td>P6c2</td><td></td></tr><tr><td>S53</td><td></td><td>Ca2MgSi2O7</td><td>P421m</td><td><a href="/facts/%25C3%2585kermanite/ouM9Jwrp">Åkermanite</a> structure</td></tr><tr><td>S6</td><td></td><td>NaAlSi2O6H2O</td><td>I43d</td><td></td></tr><tr><td>S62</td><td></td><td>Na8Al6Si6O24Cl2</td><td>P43n</td><td></td></tr></tbody></table> <h2 id="see-also">See also</h2> <ul><li><a href="/facts/Space_group/2XQx0J7M">Space group</a></li> <li><a href="/facts/Crystal_system/dMQLk1q4">Crystal system</a></li> <li><a href="/facts/Pearson_symbol/K3qljnNu">Pearson symbol</a></li></ul> <h2 id="external-links">External links</h2> <ul><li><a href="https://www.atomic-scale-physics.de/lattice/struk/index.html">"Crystal Lattice Structures: Index by Strukturbericht Designation"</a>. Retrieved 2020-05-01.</li> <li><a href="https://aflowlib.org/CrystalDatabase/strukturberichts.html">"Library of Crystallographic Prototypes - Strukturbericht Designations"</a>. Retrieved 2020-05-01.</li></ul> <h2 id="references">References</h2> <ol> <li id="fn:1"><p>"Index by Strukturbericht Designation". US Naval Laboratory Center for Materials Physics and Technology. 1 Sep 1995. Archived from the original on 12 September 2019. Retrieved 6 Apr 2019. <a href="https://web.archive.org/web/20190912194828/http://aflowlib.duke.edu/users/egossett/lattice/struk/index.html" target="_blank">https://web.archive.org/web/20190912194828/http://aflowlib.duke.edu/users/egossett/lattice/struk/index.html</a> <a href="#fnref:1" class="footnote-back-ref">↩</a></p></li> <li id="fn:2"><p>Mehl, Michael J.; Hicks, David; Toher, Cormac; Levy, Ohad; Hanson, Robert M.; Hart, Gus; Curtarolo, Stefano (2017). "The AFLOW Library of Crystallographic Prototypes: Part 1". Computational Materials Science. 136: S1 – S828. arXiv:1806.07864. doi:10.1016/j.commatsci.2017.01.017. ISSN 0927-0256. S2CID 119490841. <a href="/wiki/ArXiv_(identifier)" target="_blank">/wiki/ArXiv_(identifier)</a> <a href="#fnref:2" class="footnote-back-ref">↩</a></p></li> <li id="fn:3"><p>Allmann, Rudolf; Hinek, Roland (2007-08-17). "The introduction of structure types into the Inorganic Crystal Structure Database ICSD". Acta Crystallographica Section A. 63 (5). International Union of Crystallography (IUCr): 412–417. Bibcode:2007AcCrA..63..412A. doi:10.1107/s0108767307038081. ISSN 0108-7673. PMC 2525864. PMID 17703075. <a href="https://www.ncbi.nlm.nih.gov/pmc/articles/PMC2525864" target="_blank">https://www.ncbi.nlm.nih.gov/pmc/articles/PMC2525864</a> <a href="#fnref:3" class="footnote-back-ref">↩</a></p></li> <li id="fn:4"><p>Bragg, W. L. (1931). "Strukturbericht, 1913–1928". Nature. 128 (3230): 511–512. Bibcode:1931Natur.128..511B. doi:10.1038/128511a0. ISSN 0028-0836. S2CID 4079798. <a href="/wiki/Lawrence_Bragg" target="_blank">/wiki/Lawrence_Bragg</a> <a href="#fnref:4" class="footnote-back-ref">↩</a></p></li> <li id="fn:5"><p>Ewald, Paul Peter; Hermann, C. (1931). Zeitschrift für Kristallographie, Kristallgeometrie, Kristallphysik, Kristallchemie. Leipzig: Akademische Verlagsgesellschaft m.b.H. <a href="/wiki/Akademische_Verlagsgesellschaft_m.b.H." target="_blank">/wiki/Akademische_Verlagsgesellschaft_m.b.H.</a> <a href="#fnref:5" class="footnote-back-ref">↩</a></p></li> <li id="fn:6"><p>"International Union of Crystallography: Structure reports". Retrieved 6 Apr 2019. <a href="https://www.iucr.org/publications/other/structure-reports" target="_blank">https://www.iucr.org/publications/other/structure-reports</a> <a href="#fnref:6" class="footnote-back-ref">↩</a></p></li> <li id="fn:7"><p>Smithells, Colin J (1949). Metals reference book (2nd ed.). New York: Interscience Publishers. OCLC 568858. <a href="/wiki/OCLC_(identifier)" target="_blank">/wiki/OCLC_(identifier)</a> <a href="#fnref:7" class="footnote-back-ref">↩</a></p></li> <li id="fn:8"><p>Pearson, W. B. (1964). A handbook of lattice spacings and structures of metals and alloys. Oxford: Pergamon Press. doi:10.1016/C2013-0-08243-6. ISBN 978-1-4832-1318-7. OCLC 883896503. S2CID 239866683. {{cite book}}: ISBN / Date incompatibility (help) <a href="978-1-4832-1318-7" target="_blank">978-1-4832-1318-7</a> <a href="#fnref:8" class="footnote-back-ref">↩</a></p></li> <li id="fn:9"><p>Mehl, Michael J. (2019). "A Brief History of Strukturbericht Symbols and Other Crystallographic Classification Schemes". Journal of Physics: Conference Series. 1290 (1). IOP Publishing: 012016. Bibcode:2019JPhCS1290a2016M. doi:10.1088/1742-6596/1290/1/012016. ISSN 1742-6588. <a href="https://doi.org/10.1088%2F1742-6596%2F1290%2F1%2F012016" target="_blank">https://doi.org/10.1088%2F1742-6596%2F1290%2F1%2F012016</a> <a href="#fnref:9" class="footnote-back-ref">↩</a></p></li> <li id="fn:10"><p>Keesom, W.H.; Taconis, K.W. (1936). "On the crystal structure of chlorine". Physica. 3 (1–4). Elsevier BV: 237–242. Bibcode:1936Phy.....3..237K. doi:10.1016/s0031-8914(36)80226-2. ISSN 0031-8914. <a href="/wiki/Bibcode_(identifier)" target="_blank">/wiki/Bibcode_(identifier)</a> <a href="#fnref:10" class="footnote-back-ref">↩</a></p></li> <li id="fn:11"><p>PEASE, R. S. (1950). "Crystal Structure of Boron Nitride". Nature. 165 (4201). Springer Science and Business Media LLC: 722–723. Bibcode:1950Natur.165..722P. doi:10.1038/165722b0. ISSN 0028-0836. PMID 15416803. S2CID 2503156. <a href="/wiki/Bibcode_(identifier)" target="_blank">/wiki/Bibcode_(identifier)</a> <a href="#fnref:11" class="footnote-back-ref">↩</a></p></li> <li id="fn:12"><p>Berastegui, P.; Hull, S. (2000). "The Crystal Structures of Thallium(I) Fluoride". Journal of Solid State Chemistry. 150 (2). Elsevier BV: 266–275. Bibcode:2000JSSCh.150..266B. doi:10.1006/jssc.1999.8587. ISSN 0022-4596. <a href="/wiki/Bibcode_(identifier)" target="_blank">/wiki/Bibcode_(identifier)</a> <a href="#fnref:12" class="footnote-back-ref">↩</a></p></li> <li id="fn:13"><p>Mehl, Michael J. (2019). "A Brief History of Strukturbericht Symbols and Other Crystallographic Classification Schemes". Journal of Physics: Conference Series. 1290 (1). IOP Publishing: 012016. Bibcode:2019JPhCS1290a2016M. doi:10.1088/1742-6596/1290/1/012016. 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