Question

In a CCP structure of compound XY, atom X is
present at octahedral voids. The ratio of 6th C. N.
and 3rd C.N. for an atom X located at body-
centre is
​

Answer 1

The ratio of 6th coordination number and 3rd coordination number is 3

Explanation

As the atom has a cubic close-packed structure,

Therefore in body center,

Number of edge centers present in X atoms=4

Number of unit cells present in x atoms=6

The 6th coordination number of atom X=6*4=24

Similarly,

The 3rd coordination number of atom X=8

Therefore,

The ratio of 6th coordination number and 3rd coordination number is:

6th C.N/3rd C.N=24/8=3

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