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A crystalline solid XY3 has ccp arrangem...

A crystalline solid `XY_3` has ccp arrangement for its element Y. X occupies

A

66% of tetrahedral, voids

B

33% of tetrahedral voids

C

66% of octahedral coids

D

33% of octahedral voids

Text Solution

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The correct Answer is:
D
In ccp arrangement, a unit cell has 4 particles of Y. To keep formula `XY_3`, number of x particles are 4/3 = 1.33. As ccp has 4 octahedral sites, the percentage of X particles occupying octahedral sites `= (1.33)/(4) xx 100 = 33%`
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