If the coordination ofCa²⁺inCaF² is 8, then the coordination number of F^- ion would be

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Solution

The correct option is B
4

In each CaF₂ each calcium cation is surrounded by eight fluoride anions in a
body centred cubic arrangement. Each fluoride ion is in contact with four
calcium ions. Thus CaF₂ has 8 : 4 co-ordination number.

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