For an ideal ionic crystal, the simplest formula is AX and the coordination number of cation is 6. The value of radius ratio

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Question

For an ideal ionic crystal, the simplest formula is AX and the coordination number of cation is 6. The value of radius ratio $(r_{A^+} : r_{X^-})$

Prashant Kotian · Accepted Answer

Correct answer: B. A coordination number of 6 corresponds to an octahedral void. For an octahedral arrangement, the ideal radius ratio () must lie in the range [0.414, 0.732). Therefore, correct answer is B.

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