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Preparation

Lanthanum nitride can be prepared from the reaction of nitrogen and lanthanum trihydride:

It can also be prepared from the reaction of ammonia and lanthanum trihydride:³

The reaction of nitrogen and lanthanum amalgam can also work:⁴

(1000 - 1400 C)

Ammonia is more reactive than N2 gas, so the synthesis works at lower temperatures:

La + NH3 -> LaN + 3/2 H2 (700 C)

Physical properties

Lanthanum nitride forms black powder that is insoluble in water.⁵ Their crystals are of the cubic system with the Fm3m space group.⁶

It is paramagnetic.

Chemical properties

Lanthanum nitride reacts with water and moisture from the air:⁷

It reacts with acids:

Uses

Gerbicidum. LaN is used as a LED material, magnetic material, semiconductor, refractory material, dyes, catalyst.⁸

References

1. "Lanthanum Nitride". American Elements. Retrieved 8 February 2024. https://www.americanelements.com/lanthanum-nitride-25764-10-7 ↩

2. 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. 978-3-11-232209-3 ↩

3. Foster, L. S. (1945). The Preparation of Crucibles from Nitrides. U.S. Atomic Energy Commission. Technical Information Service. p. 8. Retrieved 8 February 2024. https://books.google.com/books?id=GNDJKHX1aOIC&dq=lanthanum+nitride&pg=PA8 ↩

4. 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. https://pubs.acs.org/doi/pdf/10.1021/ja01141a004 ↩

5. "Lanthanum Nitride". American Elements. Retrieved 8 February 2024. https://www.americanelements.com/lanthanum-nitride-25764-10-7 ↩

6. 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. https://pubs.acs.org/doi/10.1021/ja01141a004 ↩

7. "Lanthanum Nitride Powder, LaN, CAS 25764-10-7 - Heeger Materials". Heeger Materials Inc. Retrieved 8 February 2024. https://heegermaterials.com/nitride-powder/1676-cobalt-nitride-powder-con-cas-12139-70-7.html ↩

8. 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. https://pubs.aip.org/aip/adv/article/11/6/065312/994237/Semiconducting-character-of-LaN-Magnitude-of-the ↩