Aluminium nitride

Aluminium nitride
Names
	Other names AlN
Identifiers
CAS Number	24304-00-5 ;
3D model (JSmol)	Interactive image; Interactive image;
ChEBI	CHEBI:50884 ;
ChemSpider	81668 ;
ECHA InfoCard	100.041.931
EC Number	246-140-8;
Gmelin Reference	13611
PubChem CID	90455;
RTECS number	BD1055000;
UNII	7K47D7P3M0 ;
CompTox Dashboard (EPA)	DTXSID8066977 ;
	InChI InChI=1S/Al.N Key: PIGFYZPCRLYGLF-UHFFFAOYSA-N ; InChI=1/Al.N/rAlN/c1-2 Key: PIGFYZPCRLYGLF-PXKYIXAJAH;
	SMILES [AlH2-]1[N+]47[AlH-]2[N+][AlH-]3[N+]8([AlH2-][NH+]([AlH2-]4)[AlH2-]6)[AlH-]4[N+][AlH-]5[N+]6([AlH2-]6)[Al-]78[N+]78[AlH-]([NH+]69)[NH+]5[AlH2-][NH+]4[AlH-]7[NH+]3[AlH2-][NH+]2[AlH-]8[NH+]1[AlH2-]9; [AlH2-]1[NH+]([AlH2-]6)[AlH2-][NH+]7[AlH-]2[N+][Al-]3([N+][AlH-]9[N+]5)[N+]18[Al-]45[N+][AlH-]5[NH+]6[Al-]78[N+]78[AlH2-][NH+]5[AlH2-][N+]4([AlH2-][NH+]9[AlH2-]4)[AlH-]7[N+]34[AlH2-][NH+]2[AlH2-]8;
Properties
Chemical formula	AlN
Molar mass	40.989 g/mol
Appearance	white to pale-yellow solid
Density	3.255 g/cm3
Melting point	2,500 °C (4,530 °F; 2,770 K)
Solubility in water	hydrolyses (powder), insoluble (monocrystalline)
Solubility	insoluble, subject of hydrolysis in water solutions of bases and acids
Band gap	6.015 eV (direct)
Electron mobility	~300 cm2/(V·s)
Thermal conductivity	321 W/(m·K)
Structure
Crystal structure	Wurtzite
Space group	C6v4-P63mc, No. 186, hP4
Lattice constant	a = 0.31117 nm, c = 0.49788 nm
Formula units (Z)	2
Coordination geometry	Tetrahedral
Thermochemistry
Heat capacity (C)	30.1 J/(mol·K)
Std molar; entropy (S⦵298)	20.2 J/(mol·K)
Std enthalpy of; formation (ΔfH⦵298)	−318.0 kJ/mol
Gibbs free energy (ΔfG⦵)	−287.0 kJ/mol
Hazards
	GHS labelling:
Pictograms
Signal word	Warning
Hazard statements	H315, H319, H335, H373, H411
Precautionary statements	P260, P261, P264, P271, P280, P301+P330+P331, P302+P352, P303+P361+P353, P304+P340, P305+P351+P338, P310, P312, P321, P332+P313, P337+P313, P362, P363, P403+P233, P405, P501
NFPA 704 (fire diamond)	1 0 0
	Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa). verify (what is ?) Infobox references

Aluminium nitride (Al N) is a solid nitride of aluminium. It has a high thermal conductivity of up to 321 W/(m·K) and is an electrical insulator. Its wurtzite phase (w-AlN) has a band gap of ~6 eV at room temperature and has a potential application in optoelectronics operating at deep ultraviolet frequencies.