Question

How many aluminium ions are present per unit cell of corundum (A1,03)?

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Answer 1

$\large\mathbf{QUESTION}$

How many aluminium ions are present per unit cell of corundum (A1,03)?

$\huge\underline\bold\pink{Answer}$

Corundum crystallises with trigonal symmetry and each unit cell contains 6 formula units. each formula unit has 2 Al3+ ions. Hence, each unit cell has 12 Al3+ ions.

$\huge\mathfrak{\: \: \: \: \: \: hope \:that \:helps!!!}$

Answer 2

Answer:

12 Al3+

Explanation: