In the crystal of $CsCl$,the nearest neighbours of each $Cs^+$ ion are

$A$ cubic solid is made up of two elements $X$ and $Y$. Atoms of $X$ are present on every alternate corner and one at the center of the cube. $Y$ is at $\frac{1}{3}$ of the total faces. The empirical formula of the compound is

Identify the type of unit cell that has particles at the centre of each face in addition to the particles at eight corners of a cube?

The mineral $ZnAl_2O_4$ has a spinel structure. The percentage of occupied octahedral voids is ........... $\%$.

The coordination number of the sphere in cubic close packed $(ccp)$ structure is

In a face-centred cubic $(FCC)$ unit cell,what fraction of the edge length is not covered by the constituent atoms?