CsBr crystallises in a body centered cubic lattice. The unit cell length is 436.6 pm. Given that the atomic mass of Cs = 133 and that of Br = 80 amu and Avogadro number being 6.02 $$ \times $$ 10²³ mol^$$-$$1, the density of CsBr is

In a face-centered cubic lattice, a unit cell is shared equally by how many unit cells?

A compound formed by elements X and Y crystallizes in a cubic structure in which the X atoms are at the corners of a cube and the Y atoms are at the face-centers. The formula of the compound is :-

The pyknometric density of sodium chloride crystal is 2.165 $$ \times $$ 10³ kg m^$$-$$3 while its X-ray density is 2.178 $$ \times $$ 10³ kg m^$$-$$3. The fraction of unoccupied sites in sodium chloride crystal is