The unit cell present in the crystal lattice of diamond is

The angle between $(100)$ and $(110)$ planes of an $FCC$ lattice is: (in $^{\circ}$)

In a face-centred cubic $(FCC)$ unit cell,the edge length $(a)$ in terms of atomic radius $(r)$ is:

$A$ solid compound $XY$ has $NaCl$ structure. If the radius of the cation is $100 \ pm,$ the radius of the anion $(Y^-)$ will be .............. $pm$.

In a tetragonal crystal system,which of the following conditions is correct?

$A$ match box exhibits