What is the coordination environment of f in a hypothetical, Ask an Expert

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In class it was pointed out that the fluorite structure, CaF2, which is generated by filling all the tetrahedral holes in a FCC array, is a common MX2 structure type.

(a) What is the coordination environment of F in a hypothetical relative of CaF2, in which Ca forms a hcp array and F occupies all the tetrahedral sites?

(b) Suggest a reason why the structure described in (a) is very rare.

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Category:- Chemistry
Reference No.:- M9455868

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