If the unit cell a mineral has |CHEMISTRY|JEE Advance 2015

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JEE Advance 2015

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Question

If the unit cell of a mineral has cubic close packed (ccp) array of oxygen atoms with m fraction of octahedral holes occupied by aluminium ions and n fraction of tetrahedral holes occupied by magnesium ions, m and n, respectively, are

Select the correct option:

A

$\frac{1}{2}, \frac{1}{8}$

B

$1, \frac{1}{4}$

C

$\frac{1}{2}, \frac{1}{2}$

D

$\frac{1}{4}, \frac{1}{8}$

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