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A spinel is an important class of oxide consisting two types of metal ions withs the oxide ions arranged in ccp layers . The normal spinel has one -eight of the tetrahendral holes occupied by one type of metal ions and one- half of the octaherdral holes occupied by another type of metal ion. Such a spine is formed by `Mg^(2+), Al^(3+) and O^(2-)` . The netutrality of the crystal is benig maintained. Type of hole occupied by `Al^(3+)` ions is:A. tetrahedralB. octahedralC. both (a) amd(b)D. None of these

Answer» Correct Answer - B


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