Boron nitride

Properties

General
Name	Boron nitride
Chemical formula	BN
Appearance	White solid
Physical
Formula weight	24.8 amu
Boiling point	sublimes at 3273 K (3000 °C)
Density	2.2 ×103 k/m3
Crystal structure	zinc blende or layered
Solubility	insoluble
Thermochemistry
ΔfH0gas	476.98 k/mol
ΔfH0solid	-250.91 kJ/mol
S0gas, 1 bar	212.36 J/mol·K
S0solid	14.77 J/mol·K
Safety
Ingestion	Classified "not hazardous"
Inhalation	?
Skin	?
Eyes	?
More info	?
SI units were used where possible. Unless otherwise stated, standard conditions were used. Disclaimer and references

Boron nitride is a binary chemical compound, consisting of equal proportions of boron and nitrogen, with composition BN. Structurally, it is isoelectronic to carbon and takes on similar physical forms: a graphite-like one, and a diamond-like one. The latter is the only material nearly as hard as diamond. It is widely used for grinding and as material for tools in industry.