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Labyrinthite
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<h2 id="occurrence-and-association">Occurrence and association</h2> <p>Labyrinthite was discovered in hyperagpaitic (ultra-alkaline) <a href="/facts/Pegmatite/qW5BUXPg">pegmatite</a> at Mt. Nyorkpakhk, Khibiny massif, <a href="/facts/Kola_Peninsula/uTtzIYES">Kola Peninsula</a>, Russia, where it represents a late-stage mineral. It coexists with <a href="/facts/Aegirine/Vq4MvHkU">aegirine</a>, alkaline <a href="/facts/Amphibole/2Nf6RDRA">amphibole</a>, <a href="/facts/Lamprophyllite/JlTPWrYm">lamprophyllite</a>, <a href="/facts/Lomonosovite/xKJnRAAp">lomonosovite</a>, potassium <a href="/facts/Feldspar/DVvFnfA9">feldspar</a>, <a href="/facts/Pectolite/JuamvVM7">pectolite</a>, <a href="/facts/Sodalite/asvGHg81">sodalite</a>, and <a href="/facts/Villiaumite/87aMeXkQ">villiaumite</a>.<a class="footnote-ref" id="fnref:8" href="#fn:8"><sup>8</sup></a> </p> <h2 id="notes-on-chemistry">Notes on chemistry</h2> <p>Beside that given in the formula, other elements substituting the main ones in labyrinthite are <a href="/facts/Manganese/j9ELd1TL">manganese</a>, <a href="/facts/Fluorine/YUV0Fb8m">fluorine</a>, and <a href="/facts/Cerium/a7UjMBQ6">cerium</a>.<a class="footnote-ref" id="fnref:9" href="#fn:9"><sup>9</sup></a> </p> <h2 id="notes-on-crystal-structure">Notes on crystal structure</h2> <p>Labyrinthite is two-modular – its structure contains <a href="/facts/Alluaivite/4yJSFoBM">alluaivite</a>-like and <a href="/facts/Eudialyte/vQIqu234">eudialyte</a>-like module. The framework of labyrinthite is 24-layered. It also characterize in doubled <i>c</i> <a href="/facts/Unit_cell/znygJqdx">unit cell</a> parameter.<a class="footnote-ref" id="fnref:10" href="#fn:10"><sup>10</sup></a> </p> <h2 id="further-reading">Further reading</h2> <ul><li>Johnsen, O., Ferraris, G., Gault, R.A., Grice, D.G., Kampf, A.R., and Pekov, I.V., 2003. The nomenclature of eudialyte-group minerals. The Canadian Mineralogist 41, 785–794</li></ul> <h2 id="references">References</h2> <ol> <li id="fn:1"><p>Mindat, http://www.mindat.org/min-27420.html <a href="http://www.mindat.org/min-27420.html" target="_blank">http://www.mindat.org/min-27420.html</a> <a href="#fnref:1" class="footnote-back-ref">↩</a></p></li> <li id="fn:2"><p>Mindat, http://www.mindat.org/min-27420.html <a href="http://www.mindat.org/min-27420.html" target="_blank">http://www.mindat.org/min-27420.html</a> <a href="#fnref:2" class="footnote-back-ref">↩</a></p></li> <li id="fn:3"><p>Khomyakov, A.P., Nechelyustov, G.N., and Rastsvetaeva, R.K., 2006. Labyrinthite (Na,K,Sr)35Ca12Fe3Zr6TiSi51O144(O,OH,H2O)9Cl3, a new mineral with a modular eudialyte-like structure from Khibiny Alkaline Massif, Kola Peninsula, Russia. Zapiski Vserossiyskogo Mineralogicheskogo Obshchestva 135(2), 38–49 <a href="#fnref:3" class="footnote-back-ref">↩</a></p></li> <li id="fn:4"><p>Khomyakov, A.P., Nechelyustov, G.N., and Rastsvetaeva, R.K., 2006. Labyrinthite (Na,K,Sr)35Ca12Fe3Zr6TiSi51O144(O,OH,H2O)9Cl3, a new mineral with a modular eudialyte-like structure from Khibiny Alkaline Massif, Kola Peninsula, Russia. Zapiski Vserossiyskogo Mineralogicheskogo Obshchestva 135(2), 38–49 <a href="#fnref:4" class="footnote-back-ref">↩</a></p></li> <li id="fn:5"><p>Mindat, http://www.mindat.org/min-27420.html <a href="http://www.mindat.org/min-27420.html" target="_blank">http://www.mindat.org/min-27420.html</a> <a href="#fnref:5" class="footnote-back-ref">↩</a></p></li> <li id="fn:6"><p>Khomyakov, A.P., Nechelyustov, G.N., and Rastsvetaeva, R.K., 2009: Dualite, Na30(Ca,Na,Ce,Sr)12(Na,Mn,Fe,Ti)6Zr3Ti3MnSi51O144(OH,H2O,Cl)9, a new zircono-titanosilicate with a modular eudialyte-like structure from the Lovozero alkaline Pluton, Kola Peninsula, Russia. Geology of Ore Deposits 50(7), 574–582 <a href="#fnref:6" class="footnote-back-ref">↩</a></p></li> <li id="fn:7"><p>Mindat, http://www.mindat.org/min-27420.html <a href="http://www.mindat.org/min-27420.html" target="_blank">http://www.mindat.org/min-27420.html</a> <a href="#fnref:7" class="footnote-back-ref">↩</a></p></li> <li id="fn:8"><p>Khomyakov, A.P., Nechelyustov, G.N., and Rastsvetaeva, R.K., 2006. Labyrinthite (Na,K,Sr)35Ca12Fe3Zr6TiSi51O144(O,OH,H2O)9Cl3, a new mineral with a modular eudialyte-like structure from Khibiny Alkaline Massif, Kola Peninsula, Russia. Zapiski Vserossiyskogo Mineralogicheskogo Obshchestva 135(2), 38–49 <a href="#fnref:8" class="footnote-back-ref">↩</a></p></li> <li id="fn:9"><p>Khomyakov, A.P., Nechelyustov, G.N., and Rastsvetaeva, R.K., 2006. Labyrinthite (Na,K,Sr)35Ca12Fe3Zr6TiSi51O144(O,OH,H2O)9Cl3, a new mineral with a modular eudialyte-like structure from Khibiny Alkaline Massif, Kola Peninsula, Russia. Zapiski Vserossiyskogo Mineralogicheskogo Obshchestva 135(2), 38–49 <a href="#fnref:9" class="footnote-back-ref">↩</a></p></li> <li id="fn:10"><p>Khomyakov, A.P., Nechelyustov, G.N., and Rastsvetaeva, R.K., 2006. Labyrinthite (Na,K,Sr)35Ca12Fe3Zr6TiSi51O144(O,OH,H2O)9Cl3, a new mineral with a modular eudialyte-like structure from Khibiny Alkaline Massif, Kola Peninsula, Russia. Zapiski Vserossiyskogo Mineralogicheskogo Obshchestva 135(2), 38–49 <a href="#fnref:10" class="footnote-back-ref">↩</a></p></li> </ol>