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:

An element crystallises in a face -centred cubic (fcc) unit cell with cell edge a. The distance between the centre of two nearest octahedral voids in the crystal lattice is ::

An element crystallises in a face -centred cubic (fcc) unit cell with cell edge a. The distance between the centre of two nearest octahedral voids in the crystal lattice is ::

The minimum distance between the centre of two octahedral voids in FCC lattice in terms of edge length is:

The minimum distance between the centre of two octahedral voids in FCC lattice in terms of edge length is:

The distance between an ocatahral and tetrahedral void in fcc lattice would be:

The distance between an ocatahral and tetrahedral void in fcc lattice would be:

The distance between an octahedral and tetrahedral void in fcc lattice would be:

In FCC, distance between nearest tetrahedral voids is :