A metal crystallises into two cubic phases, one is face-centred cubic (fcc) and other is body-centred cubic (bcc). The edge lengths are 4 A∘ for fcc and 2 A∘ for bcc. Calculate the ratio of densities of fcc to bcc.

A metal crystallises into two cubic phases, one is face-centred cubic

1.	A metal crystallises into two cubic phases, one is face-centred cubic (fcc) and other is body-centred cubic (bcc). The edge lengths are 4 A∘ for fcc and 2 A∘ for bcc. Calculate the ratio of densities of fcc to bcc.
Answer» A metal crystallises into two cubic phases, one is face-centred cubic (fcc) and other is body-centred cubic (bcc). The edge lengths are 4 $A^{\circ}$ for fcc and 2 $A^{\circ}$ for bcc. Calculate the ratio of densities of fcc to bcc.