Asked by  | 26th Jun, 2013, 06:54: PM

Expert Answer:

The element Y forms CCP lattice.
The number of octahedral voids = the number of atoms of Y present.
As all the octahedral voids are occupied by the atoms of  X, their number would be equal to that of Y.
So the atoms of elements X & Y are present in equal numbers, in a ratio of 1:1 .
Therefore the formula of the compound is XY. 

Answered by  | 27th Jun, 2013, 12:49: AM

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