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Choose the Best Answer · Q12

Q.The vacant space in bcc lattice unit cell is

(a) 48%
(b) 23%
(c) 32%
(d) 26%
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Step 1. The packing efficiency of a body-centred cubic (bcc) lattice, derived from the body-diagonal relation 3a=4r\sqrt{3}a = 4r, works out to 68%. …

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