The coordination number of cation and anion in Fluorite $C a F_{2}$ and CsCl are respectively

8:4 and 6:3

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6:3 and 4:4

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8:4 and 8:8

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4:2 and 2:4

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Solution

The correct option is C
8:4 and 8:8

$C a F_{2}$ - has antiflourite structure with calcium ions which occupy tetrahedral voids and fluoride ions form the closed pack structure making the co-ordination number of 8:4.

CsCl = between 0.732 to 1,so the co-ordination of both ions is 8.

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Similar questions

(C a F_{2})

C s C l

In calcium fluoride, having the fluorite structure the coordination numbers for the calcium ion $C a^{2 +}$ and fluoride ion $(F^{-})$ are

(C a^{2 +})

(F^{-})

C a F_{2}

C s C l

List-I (Solids)	List-II (Unit cell)	List-III (Coordination number)
(a) Rock salt	(p) Face-centred cubic, anion in tetrahedral void	(w) 6
(b) Fluorite	(q) Face-centred cubic, cation in octahedral void	(x) Cation (8), anion (4)
(c) Agl, ZnS	(r) Face-centred cubic, cation in alternate tetrahedral void	(y) Cation (4), anion (8)
(d) $N a_{2} O$	(s) Face-centred cubic, cation in tetrahedral void	(z) Cation (4), anion (4)

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