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Question

The number of molecules in a unit cell of fluorite is_____.

Solution
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The number of molecules in a unit cell of fluorite is 4. Examples include CaF2,BaCl2,BaF2,SrF2.

In CaF2 unit cell, Ca2+ ion occupy ccp and F ions occupy all the tetrahedral voids.

The coordination number of Ca2+ is 8 and the coordination number of F ions is 4.

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