http://en.wikipedia.org/wiki/Gallium(III)_nitride#Physical_properties


Gallium nitride

IUPAC name [show]
Gallium nitride
Identifiers
CAS number [25617-97-4]
Properties
Molecular formula GaN
Molar mass 83.73 g/mol
Appearance Yellow powder.
Density 6.15 g/cm3, solid
Melting point >2500°C[1]

Solubility in water Reacts.
Basicity (pKb) N/A
Band gap 3.2 eV (300 K)
Electron mobility 440 cm2/(V*s) (300 K)
Thermal conductivity 1.3 W/(cm*K) (300 K)
Refractive index (nD) 2.3
Structure
Crystal structure Wurtzite
Space group C6v4-P63mc
Coordination
geometry Tetrahedral
Hazards
EU Index Not listed
Flash point Non-flammable.
Related compounds
Other anions Gallium phosphide
Gallium arsenide
Gallium antimonide
Other cations Boron nitride
Aluminium nitride
Indium nitride
Related compounds Aluminium gallium arsenide
Indium gallium arsenide

Gallium arsenide phosphide

Except where noted otherwise, data are given for
materials in their standard state
(at 25 °C, 100 kPa)
Infobox references