Why do calculations based on Avogadro's number give 6 GaN molecules in one wurtzite unit cell, when there are actually 2 Ga and 2 N atoms in it ?

There are 2 Ga and 2 N atoms in a unit cell of wurtizite GaN as per its crystal structure. But calculations based on Avogadro's number give 6 GaN atoms per unit cell. What could cause this...

05 May 2018 10,033 8 View