the most closely packed among the following crystal lattices is
(A)simple cubic close packing

(B)body centred cubic arrangement

(C)face centred cubic arrangement

(D)both fcc and bcc

Correct option is (C)
The most closely packed structure is determine by its packing efficiency.

Packing efficiency for FCC = 74%
Packing efficiency for BCC = 68%
​Packing efficiency for simple cubic crystal = 52%
This shows that FCC is most closely packed crystal lattice.


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