Q. 10 C3.7( 15 Votes )
Calculate the efficiency of packing in case of a metal crystal for
face-centred cubic (with the assumptions that atoms are touching each other).
Let the base of the hexagon is a and the height is c
Each angle in hexagonal will be 60 degree at the base
Packing efficiency of Hexagonal close- packed lattice
a = 2r c = 1.633a
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