Name Boron nitride
Chemical formula BN
Appearance White solid


Formula weight 24.8 amu
Boiling point sublimes at 3273 K (3000 °C)
Density 2.2 ×103 kg/m3
Crystal structure zinc blende or layered
Solubility insoluble


ΔfH0gas 476.98 kJ/mol
ΔfH0solid -250.91 kJ/mol
S0gas, 1 bar 212.36 J/mol·K
S0solid 14.77 J/mol·K


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.