Lanthanum nitride

"LaN" redirects here. For other uses, see Lan.

Lanthanum nitride is a binary inorganic compound of lanthanum and nitride with the chemical formula LaN.^[1][2]

Lanthanum nitride

Names
IUPAC name Azanylidynelanthanum
Other names Lanthanum mononitride, lanthanum(III) nitride
Identifiers
CAS Number	25764-10-7
3D model (JSmol)	Interactive image
ChemSpider	105115
ECHA InfoCard	100.042.936
EC Number	247-245-1
PubChem CID	117627
CompTox Dashboard (EPA)	DTXSID9067140
InChI InChI=1S/La.N Key: QCLQZCOGUCNIOC-UHFFFAOYSA-N
SMILES [La+3].[N-3]
Properties
Chemical formula	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)
Solubility in water	Insoluble
Hazards
GHS labelling:
Pictograms
Signal word	Warning
Hazard statements	H315, H319, H335
Precautionary statements	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). Infobox references

Preparation

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

2LaH₃ + N₂ → 2LaN + 3H₂

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

LaH₃ + NH₃ → LaN + 3H₂

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

La + 1/₂ N₂ → LaN

(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.^[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 + 3H₂O → La(OH)₃ + NH₃

It reacts with acids:

LaN + 4HCl → LaCl₃ + NH₄Cl

Uses

Gerbicidum. LaN is used as a LED material, magnetic material, semiconductor, refractory material, dyes, catalyst.^[7]