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A mineral having the formula AB(2), crys...

A mineral having the formula `AB_(2)`, crystallises in the cubic close -packed lattice, with the A atom occupying the lattice points. The co-ordination number of the A atoms is x, that of B atoms is y. Report your answer `( x- y)`

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Verified by Experts

The correct Answer is:
`4(8 - 4)`
It is fluorite `(CaF_(2))` strucutre. Since formula is `AB_(2)`
`rArr` No. of B atoms is twice the no. of A atoms. Hence B occupies all the tetrahedral voids (100%)
`{:(AB_(2) " is " (8 " : " 4)" compound (Fluorite Structure compound)",),(" "darr" "darr,),(" "C.N. "of" A " "C.N. "of "B,):}`
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