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In the spinel structure, oxides ions are cubical-closest packed whereas 1/8th of tetrahedral voids are occupied by A2+ cation and 1/2 of octahedral voids are occupied by B3+ cations. The general formula of the compound having spinel structure is:

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a

A2B2O4

b

AB2O4

c

A2B4O2

d

A4B2O2

answer is B.

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Detailed Solution

Effective no.of O2- in a unit Cell=8Ã18+6Ã12=4Effective no, of A2+ in a unit cell =8Ã18=1Effective no. of B3+ in a unit cell 1=4Ã12=2â´ general formula is AB2O4

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In the spinel structure, oxides ions are cubical-closest packed whereas 1/8th of tetrahedral voids are occupied by A2+ cation and 1/2 of octahedral voids are occupied by B3+ cations. The general formula of the compound having spinel structure is: