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CBSE Class 12-science Answered

In AB2O4, the oxide ions are placed in cubic close packed lattice, cation A is present in tetrahedral voids and cations B are present in octahedral voids. What is the percentage of tetrahedral and octahedral voids occupied by A and B respectively?
Asked by Topperlearning User | 17 Jun, 2016, 10:51: AM
answered-by-expert Expert Answer

In CCP lattice of oxide ions, there would be two tetrahedral voids and one octahedral void for each oxide ion. Therefore for four oxide ions, there would be 8 tetrahedral and 4 octahedral voids. Out of 8 tetrahedral voids, 1 is occupied by

A and out of 4 octahedral voids 2 are occupied by B
% of tetrahedral voids occupied by A =begin mathsize 10px style 1 over 8 cross times 100 equals 12.5 % end style
% of octahedral voids occupied by B =begin mathsize 10px style 2 over 4 cross times 100 equals 50 % end style
Answered by | 17 Jun, 2016, 12:51: PM

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ANSWERED BY EXPERT ANSWERED BY EXPERT
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