The stacking pattern in a body-centered cubic $(bcc)$ lattice is of the type............

The ratio of densities if the same element undergoes $FCC$ and $HCP$ close packing is:

$A$ solid element (metal) crystallises in $ABABAB$ type packing in three dimensions. If the density of the element and its atomic radius are $5.0 \ g/cm^3$ and $100\sqrt{2} \ pm$ respectively, the atomic mass of the element is $(N_A = 6 \times 10^{23} \ mol^{-1})$

$A$ mineral consists of a cubic close-packed structure formed by $O^{2-}$ ions,where half the octahedral voids are occupied by $Al^{3+}$ and one-eighth of the tetrahedral voids are occupied by $Mn^{2+}$. The chemical formula of the mineral is

In a cubic close packing,the unit cell has...

Show that in a cubic close packed $(ccp)$ structure,eight tetrahedral voids are present per unit cell.