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In the fcc arrangement of A and B atoms ...

In the fcc arrangement of `A` and `B` atoms whose `A` atoms are at corners of the unit cell and `B` are at the face centres one of the `A` atom is missing from one corner in each unit cell. What is the simplest formula of the compound?

Text Solution

Verified by Experts

The correct Answer is:
`A_(7)B_(24)`
Corners share `= 7 xx (1)/(8) = (7)/(8)`
Face centre share `= 6 xx (1)/(2) = 3`
Formula: `A_(7//8)B_(3)` or `A_(7)B_(24)`.
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