The correct coordination number for the zinc ion in the zinc blende crystal structure is:

In an ionic compound,the unit cell has $A$ ions at the corners and $B$ ions at the face centers. What is the empirical formula of the compound?

$A$ cubic structure is formed where atoms of element $X$ are occupied at the corners of the cube and also at the face centers. Atoms of element $Y$ are present at the body center and at the edge centers. If all the atoms are removed along a plane passing through the middle of the cube (bisecting the four edges),the formula will become

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

In the fluorite structure,the coordination number of $Ca^{2+}$ ion is

How many unit cells are present in $39 \ g$ of potassium that crystallizes in a body-centered cubic $(BCC)$ structure? [Atomic weight of $K = 39$]