The lattice of the hexagonal close packed crystal is hexagonal and a basis of two atoms is placed in the same orientation on each lattice point. The diagrams below illustrate the geometry and space ...

Since the crystal lattices of the two layers are no longer ... Kiper and her colleagues use two layers of hexagonal boron nitride (an artificially synthesized solid that is almost as hard as ...

The crystal structure is also known as diamond cubic and may be thought of as two interpenetrating fcc lattices, one for sulphur the other for zinc, with their origins displaced by one quarter of a ...