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In compound atoms of element Y forms ccp lattice and those of element

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asked Dec 9, 2017 in Chemistry by sforrest072 (157,439 points) ● 63 ● 448 ● 1286

 In compound atoms of element Y forms ccp lattice and those of element X occupy 2/3rd of tetrahedral voids. What is the formula of the compound ?

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answered Dec 9, 2017 by mdsamim (213,225 points) ● 5 ● 10 ● 23
selected Dec 9, 2017 by sforrest072
 
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No. of Y atoms per unit cell in ccp lattice = 4

 No. of tetrahedral voids = 2 × 4 = 8

 No. of tetrahedral voids occupied by X = 2/3 × 8 = 16/3

 Therefore, Formula of the compound = X16/3Y4

= X16Y12

= X4 Y3

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