InterviewSolution
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InterviewSolution
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In the spinel structure, oxides ions are cubical`-` closest packed whereas `1//8 th` of tetrahedral voids are occupied by `A^(2+)` cation and `1//2` of octahedral voids are occupied by `B^(2+)` cations. The general formula of the compound having spinel structure is `:`A. `A_(2)B_(2)O_(4)`B. `AB_(2)O_(4)`C. `A_(2)B_(4)O_(2)`D. `A_(4)B_(2)O_(2)` |
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Answer» Correct Answer - B Effective no. of `O^(2-)` in a unit cell `=8xx(1)/(8)+6xx(1)/(2)=4` Effective no of `A^(2+)` in a unit cell `=8xx(1)/(8)=1` Effective no. of `B^(3+)` in a unit cell `=4xx=2" ":." "` general formula is `AB_(2)O_(4)` |
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