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| 1. |
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. The fromule of the spinel is :A. `mg_(2)AlO_(2)`B. `MgAl_(2)O_(4)`C. `Mg_(3)Al_(3)O_(6)`D. none of the above |
| Answer» Correct Answer - B | |