Question

The correct order of the packing efficiency in different types of unit cells is

• A. fcc < bcc < simple cubic
• B. fcc > bcc > simple cubic
• C. fcc < bcc > simple cubic
• D. bcc < fcc > simple cubic

Answer 1

Answer: (B)

Packing efficiency,
for sc unit cell = 54%
for bcc unit cell = 68%
for fcc unit cell = 74%
Thus, the order of packing efficiency is fcc > bcc > sc