Question

How to calculate packing efficiency of bcc

Answer 1

Answer:

In body-centred cubic structures, the three atoms are diagonally arranged. To find the packing efficiency we consider a cube with edge length a, face diagonal length b and cube diagonal as c. Therefore packing efficiency of the body-centred unit cell is 68%. Metals like iron and chromium fall under bcc category.

Answer 2

✳In BCC the atoms are present at the corners and at body centered.

✳If there are 8 corners their contribution to each is 8*1/8. that is 1.

✳There fore the packing efficiency is 68percent..

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