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Lanthanum nitride
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<h2 id="preparation">Preparation</h2> <p>Lanthanum nitride can be prepared from the reaction of nitrogen and lanthanum trihydride: </p> 2LaH3 + N2 → 2LaN + 3H2 <p>It can also be prepared from the reaction of <a href="/facts/Ammonia/MtLtJFtz">ammonia</a> and lanthanum trihydride:<a class="footnote-ref" id="fnref:3" href="#fn:3"><sup>3</sup></a> </p> LaH3 + NH3 → LaN + 3H2 <p>The reaction of nitrogen and lanthanum amalgam can also work:<a class="footnote-ref" id="fnref:4" href="#fn:4"><sup>4</sup></a> </p> La + 1/2 N2 → LaN <p>(1000 - 1400 C) </p><p>Ammonia is more reactive than N2 gas, so the synthesis works at lower temperatures: </p><p>La + NH3 -> LaN + 3/2 H2 (700 C) </p> <h2 id="physical-properties">Physical properties</h2> <p>Lanthanum nitride forms black powder that is insoluble in water.<a class="footnote-ref" id="fnref:5" href="#fn:5"><sup>5</sup></a> Their crystals are of the <a href="/facts/Cubic_crystal_system/92Co7BKM">cubic system</a> with the <i>Fm3m</i> <a href="/facts/Space_group/2XQx0J7M">space group</a>.<a class="footnote-ref" id="fnref:6" href="#fn:6"><sup>6</sup></a> </p><p>It is paramagnetic. </p> <h2 id="chemical-properties">Chemical properties</h2> <p>Lanthanum nitride reacts with water and moisture from the air:<a class="footnote-ref" id="fnref:7" href="#fn:7"><sup>7</sup></a> </p> LaN + 3H2O → La(OH)3 + NH3 <p>It reacts with acids: </p> LaN + 4HCl → LaCl3 + NH4Cl <h2 id="uses">Uses</h2> <p>Gerbicidum. LaN is used as a LED material, magnetic material, <a href="/facts/Semiconductor/zFf3mGTE">semiconductor</a>, <a href="/facts/Refractory_material/LoKrzGkR">refractory material</a>, dyes, catalyst.<a class="footnote-ref" id="fnref:8" href="#fn:8"><sup>8</sup></a> </p> <h2 id="references">References</h2> <ol> <li id="fn:1"><p>"Lanthanum Nitride". American Elements. Retrieved 8 February 2024. <a href="https://www.americanelements.com/lanthanum-nitride-25764-10-7" target="_blank">https://www.americanelements.com/lanthanum-nitride-25764-10-7</a> <a href="#fnref:1" class="footnote-back-ref">↩</a></p></li> <li id="fn:2"><p>Derz, Friedrich W. (18 May 2020). H-Z. Walter de Gruyter GmbH & Co KG. p. 1179. ISBN 978-3-11-232209-3. Retrieved 8 February 2024. <a href="978-3-11-232209-3" target="_blank">978-3-11-232209-3</a> <a href="#fnref:2" class="footnote-back-ref">↩</a></p></li> <li id="fn:3"><p>Foster, L. S. (1945). The Preparation of Crucibles from Nitrides. U.S. Atomic Energy Commission. Technical Information Service. p. 8. Retrieved 8 February 2024. <a href="https://books.google.com/books?id=GNDJKHX1aOIC&dq=lanthanum+nitride&pg=PA8" target="_blank">https://books.google.com/books?id=GNDJKHX1aOIC&dq=lanthanum+nitride&pg=PA8</a> <a href="#fnref:3" class="footnote-back-ref">↩</a></p></li> <li id="fn:4"><p>Young, R. A.; Ziegler, W. T. (November 1952). "Crystal Structure of Lanthanum Nitride 1,2". Journal of the American Chemical Society. 74 (21): 5251–5253. doi:10.1021/ja01141a004. ISSN 0002-7863. Retrieved 8 February 2024. <a href="https://pubs.acs.org/doi/pdf/10.1021/ja01141a004" target="_blank">https://pubs.acs.org/doi/pdf/10.1021/ja01141a004</a> <a href="#fnref:4" class="footnote-back-ref">↩</a></p></li> <li id="fn:5"><p>"Lanthanum Nitride". American Elements. Retrieved 8 February 2024. <a href="https://www.americanelements.com/lanthanum-nitride-25764-10-7" target="_blank">https://www.americanelements.com/lanthanum-nitride-25764-10-7</a> <a href="#fnref:5" class="footnote-back-ref">↩</a></p></li> <li id="fn:6"><p>Young, R. A.; Ziegler, W. T. (November 1952). "Crystal Structure of Lanthanum Nitride 1,2". Journal of the American Chemical Society. 74 (21): 5251–5253. doi:10.1021/ja01141a004. ISSN 0002-7863. Retrieved 8 February 2024. <a href="https://pubs.acs.org/doi/10.1021/ja01141a004" target="_blank">https://pubs.acs.org/doi/10.1021/ja01141a004</a> <a href="#fnref:6" class="footnote-back-ref">↩</a></p></li> <li id="fn:7"><p>"Lanthanum Nitride Powder, LaN, CAS 25764-10-7 - Heeger Materials". Heeger Materials Inc. Retrieved 8 February 2024. <a href="https://heegermaterials.com/nitride-powder/1676-cobalt-nitride-powder-con-cas-12139-70-7.html" target="_blank">https://heegermaterials.com/nitride-powder/1676-cobalt-nitride-powder-con-cas-12139-70-7.html</a> <a href="#fnref:7" class="footnote-back-ref">↩</a></p></li> <li id="fn:8"><p>Deng, Zihao; Kioupakis, Emmanouil (1 June 2021). "Semiconducting character of LaN: Magnitude of the bandgap and origin of the electrical conductivity". AIP Advances. 11 (6). arXiv:2106.04646. Bibcode:2021AIPA...11f5312D. doi:10.1063/5.0055515. S2CID 235376911. Retrieved 8 February 2024. <a href="https://pubs.aip.org/aip/adv/article/11/6/065312/994237/Semiconducting-character-of-LaN-Magnitude-of-the" target="_blank">https://pubs.aip.org/aip/adv/article/11/6/065312/994237/Semiconducting-character-of-LaN-Magnitude-of-the</a> <a href="#fnref:8" class="footnote-back-ref">↩</a></p></li> </ol>