In the ionic solid \( \mathrm{AB} \), the radius of cation \( \mathrm{A} \) is \( 1.29 \AA \) wh...

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In the ionic solid \( \mathrm{AB} \), the radius of cation \( \mathrm{A} \) is \( 1.29 \AA \) while that of anion B is \( 1.76 \AA \). Predict the coordination of A
(a) 4
(b) 8
(c) 6
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