The unit cell of a $NaCl$ lattice:

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

$A$ compound of $A$ and $B$ crystallises in a cubic lattice in which $A$ atoms occupy the lattice points at the corners of the cube. The $B$ atoms occupy the centre of each face of the cube. The probable empirical formula of the compound is

In a cubic structure of a compound made from $X$ and $Y$,where $X$ atoms are at the corners of the cube and $Y$ atoms are at the face centers of the cube,the molecular formula of the compound is:

What is the value of the radius ratio for an ionic crystal having a coordination number of $6$?

The ratio of cationic radius to anionic radius in an ionic crystal is greater than $0.732$. Its coordination number is