A) \[X{{Y}_{3}}\]
B) \[{{X}_{3}}Y\]
C) \[XY\]
D) \[X{{Y}_{\,}}_{2}\]
Correct Answer: A
Solution :
In unit cell, X-atoms at the comers \[=\frac{1}{8}\times 8=1\] Y-atoms at the face centres\[=\frac{1}{2}\times 6=3\] Ratio of X and\[Y=1:3\]. Hence, formula is\[X{{Y}_{3}}\].
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