A metal crystallizes into two cubic system-face centred cubic (FCC) and body centred cubic (BCC) whose unit cell lengths are 3.5 and 3.0 respectively. Calculate the ratio of densities of FCC and BCC.
Given:
FCC unit cell length = 3.5 BCC
unit cell length = 3.0
z1 for FCC = 4
z2 for BCC = 2
To Find: Ratio of densities of FCC and BCC
Calculation:
FCC unit cell length = 3.5
BCC unit cell length = 3.0 From formula
(i),
