For some crystals,the radius ratio for cation and anion is $0.525$,its coordination number will be

Total volume of atoms present in a face-centred cubic unit cell of a metal is ($r$ is atomic radius)

$A$ compound formed by elements $X$ and $Y$ crystallises in a cubic structure, where $X$ atoms are at the corners of a cube and $Y$ atoms are at the body centre. The formula of the compound is:

The number of nearest neighbours and next nearest neighbours of an $Na^{+}$ ion in a crystal of $NaCl$ are respectively

An element has a face-centred cubic $(fcc)$ structure with a cell edge of $a$. The distance between the centres of two nearest tetrahedral voids in the lattice is

In a face-centered cubic unit cell,what fraction of an atom at the corner is shared by the unit cell?