The number of close neighbours in a body-centred cubic $(BCC)$ lattice of identical spheres is:

The number of atoms/molecules contained in one body-centered cubic unit cell is

If $Z$ is the number of atoms in the unit cell that represents the closest packing sequence $ABCABC$,the number of tetrahedral voids in the unit cell is equal to

The ionic radii of $A^{+}$ and $B^{-}$ ions are $0.98 \times 10^{-10} \ m$ and $1.81 \times 10^{-10} \ m$. The coordination number of each ion in $AB$ 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?