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In a unit cell, atoms (A) are present at...

In a unit cell, atoms `(A)` are present at all corner lattices, `(B)` are present at alternate faces and all edge centres. Atoms `(C)` are present at face centres left from `(B)` and one at each body diagonal at disntance of `1//4th` of body diagonal from corner.
Formula of given solid is

A

`0.58`

B

`0.25`

C

`0.48`

D

`0.86`

Text Solution

Verified by Experts

The correct Answer is:
A
There are `8` effective TVs out of which 4 are occpied (one at each body diagonal) and 4 effective Ovs such that one is ot filled (body centre). So out of `12(8 TVs + 4 "Ovs")`, only `7` are occpied `= 7/(12) = 0.58`
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