1) what is the packing efficiency of metal crystal in body centred cubic lattice.
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Explanation:
Packing efficiency =162 r3316πr3×100=74%
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For simple cubic metal crystal the efficiency of packing = 52.4%. (b) Body centred cubic: From the figure it is clear that the atom at the centre will be in touch with other two atoms diagonally arranged and shown with solid boundaries. Hence, for face centred cubic, efficiency of packing = 74%.
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