In zinc blende structure,the coordination number of $Zn^{2+}$ ion is

What is the number of unit cells in one mole of an atom of a metal that forms a simple cubic structure?

Calculate the number of atoms per unit cell in a face-centered cubic $(fcc)$ unit cell.

The number of octahedral sites per sphere in a $fcc$ structure is

An alloy of gold and copper crystallizes in a cubic lattice in which the gold atoms occupy the lattice points at the corners of a cube and copper atoms occupy the centers of each of the cube faces. Determine the formula of this compound.

What is the coordination number in a hexagonal close-packed $(h.c.p.)$ structure?