Lanthanum nitride
Chemical compound
From Wikipedia, the free encyclopedia
Lanthanum nitride is a binary inorganic compound of lanthanum and nitride with the chemical formula LaN.[1][2]
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| Names | |
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| IUPAC name
Azanylidynelanthanum | |
| Other names
Lanthanum mononitride, lanthanum(III) nitride | |
| Identifiers | |
3D model (JSmol) |
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| ChemSpider | |
| ECHA InfoCard | 100.042.936 |
| EC Number |
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PubChem CID |
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CompTox Dashboard (EPA) |
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| Properties | |
| LaN | |
| Molar mass | 152.912 g·mol−1 |
| Appearance | Black powder |
| Density | 6.73 g/cm3 |
| Melting point | 2,450 °C (4,440 °F; 2,720 K) |
| Insoluble | |
| Hazards | |
| GHS labelling: | |
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| Warning | |
| H315, H319, H335 | |
| P264, P271, P280, P302, P304, P305, P312, P313, P332, P338, P340, P351, P352, P362, P501 | |
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa).
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Preparation
Lanthanum nitride can be prepared from the reaction of nitrogen and lanthanum trihydride:
- 2 LaH3 + N2 → 2 LaN + 3 H2
It can also be prepared from the reaction of ammonia and lanthanum trihydride:[3]
- LaH3 + NH3 → LaN + 3 H2
The reaction of nitrogen and lanthanum amalgam can also work:[4]
- La + ½ N2 → LaN (1000 - 1400 °C)
Ammonia is more reactive than N2 gas, so the synthesis works at lower temperatures:
- La + NH3 → LaN + 1.5 H2 (700 °C)
Physical properties
Lanthanum nitride forms black powder that is insoluble in water.[1] Their crystals are of the cubic system with the Fm3m space group.[5]
It is paramagnetic.
Chemical properties
Lanthanum nitride reacts with water and moisture from the air:[6]
- LaN + 3 H2O → La(OH)3 + NH3
It reacts with acids:
- LaN + 4 HCl → LaCl3 + NH4Cl
Uses
LaN is used as a LED material, magnetic material, and in semiconductors, refractory materials, dyes, and catalysts.[7]