Question

The packing efficiency of simple cubic $\left(sc\right)$, body centered cubic $\left(bcc\right)$ and cubic close packing $\left(ccp\right)$ lattices follows the order:

• A. $bcc<ccp<sc$
• B. $ccp<bcc<sc$
• C. $sc<ccp<bcc$
• D. $sc<bcc<ccp$

Answer 1

The correct option is D $sc<bcc<ccp$

The packing efficiency of simple cubic(SC), body centered cubic (bcc) and cubic close packing (ccp) lattices follows the order :

scc (52.4 %) < bcc (68 %) < ccp (74 %).

SC is loosely bonded. Almost half the space is empty. CCP is the most efficient packing.
Option (D) is the correct answer.