The vacant space in B.C.C. unit cell isA. 0.32B. 0.1C. 0.23D. 0.46

1.	The vacant space in B.C.C. unit cell isA. 0.32B. 0.1C. 0.23D. 0.46
Answer» Correct Answer - A Packing efficiency `= (2 xx (4)/(3) pi R^(3))/(((4R)/(sqrt3))^(3)) = (sqrt3pi)/(8) = 68%` Vacent space `= 100 - 68

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The vacant space in B.C.C. unit cell isA. 0.32B. 0.1C. 0.23D. 0.46

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