Boron nitride

This article is a stub. It needs to be expanded.

Some ionic bond strength component in contrast to carbon structures. Very strong (comparably to covalent) dative bonding.

h-BN

Isostructural to graphite.
Most common in literature as of 2025.
In stark contrast to graphite a very good insulator.

Isostructural to diamond and zincblende structure.
Less common in literature as of 2025.

Interesting in seamless crystal structure transitions to and from diamond.

Either for structural mechanical reasons (intentional bending by slight size differences).
Or for electronic property reasons.

One period up analogous compound would be aluminum phosphide. Highly toxic.
The two mixed period variants:

Aluminum nitride (attacked by water if not sealed, hexagonal wurzite structure lower engery)
Boron phosphate (very stable and hard)

Isostructural to lonsdaleite and wurzite structure.
Exotic in literature as of 2025.