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A mineral having the formula AB(2) cryst...

A mineral having the formula `AB_(2)` crystallizes in the ccp lattice, with `A` atoms occupying the lattice points. Select the correct statement(s).

A

The coordination number `(CN)` for `A` atoms `= 8`.

B

The `CN` for `B` atom `= 4`

C

`100%` of `TV_(s)` are occupied by `B` atoms

D

`50%` of `TV_(s)` are occupied by `B` atoms.

Text Solution

Verified by Experts

The correct Answer is:
A, B, C
Number of atoms `= 4` (for ccp crystal)
Formula `= 4AB_2 = A_4B_8`
`:. CN` of `A =8`[`CN` of `A =` Number of `B` atoms]
`CN` of `B= 4` [`CN` of `B =` Number of `A` atoms]
In ccp arrangment, all `TVs` are occupied (fluorite-type structure).
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