Spinel is an important class of oxides consisting of two types of metal ions with the oxide ions arr — Solid State Chemistry Question
Question
Spinel is an important class of oxides consisting of two types of metal ions with the oxide ions arranged in CCP pattern. The normal spinel has one-eighth of the tetrahedral holes occupied by one type of metal ion and one-half of the octahedral holes occupied by another type of metal ion. Such a spinel is formed by Zn2+, Al3+ and $O_2$-. The simplest formula of such spinel is
Answer: A
💡 Solution & Explanation
Oxide ions ($O_2$-) in CCP = 4. Total tetrahedral holes = 8, occupied by Zn2+ = 1/8 × 8 = 1. Total octahedral holes = 4, occupied by Al3+ = 1/2 × 4 = 2. The formula is ZnAl2O4.
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