In fluorite structure, positive ions are arranged in ?

simple cubic

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bcc

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ccp

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hcp

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Solution

The correct option is C ccp
In flrorite ions like $C a F_{2}$ the positively charged cations are arranged in ccp arrangement i.e. these ions occupy all the corner positions and the center of each of the cube.
Fluoride ions are so located that there are four cations around it. It may be said that the fluoride ions occupy tetrahedral sites and the coordination number of fluoride ion is 4.

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K_{2} [P_{2} i C l_{3}]

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