The number of next nearest neighbours around each particle in face-centred cubic lattice is

How many nearest neighbours surrounded each particle in a face-centred cubic lattice?

An example of a face centred cubic lattice is

An example of a face centred cubic lattice is

How many nearest neighbours surround each ion in a face-centered cubic lattice of an ionic crystal ?

How many nearest neighbours surround each ion in a face-centered cubic lattice of an ionic crystal ?

The number of nearest neighbours and that of next nearest neighbours of an atom of a metal with face-centred cubic crystal structure, respectively, are-