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Voids

In a normal s...

Question

In a normal spinal structure, there is a closed packed array of $O^{2 -}$ ions. The trivalent cations are present in:

A

75 %

of octahedral voids

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B

50 %

of octahedral voids

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C

12.5 %

of tetrahedral voids

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D

25 %

of octahedral voids

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Solution

The correct option is B $50 %$ of octahedral voids
In normal spinal structure,
structure, $A^{2 +}$ occupy $\frac{1}{8^{t h}}$ of the tetrahedral voids and $B^{3 +}$ occupy $\frac{1}{2}$ i.e, 50% of the octahedral voids .
Hence, 50% is the answer
The correct option is $B$ .

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