Potassium hexachloroplatinate, $K_{2} [{PtCl}_{6}]$ adopts anti-fluorite crystal structure. The correct informations about ideal $K_{2} [{PtCl}_{6}]$ crystal is/are :

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$K^{+}$ ions occupy all the tetrahedral voids.

The unit cell is FCC with respect to ${PtCl}_{6}^{2 -}$ ions.

The coordination number of ${PtCl}_{6}^{2 -}$ ions is 4.

The coordination number of ${PtCl}_{6}^{2 -}$ ions is 8.

answer is A, D, B.

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Detailed Solution

In antiflurite structure, the cations occupy tetrahedral voidsy and anions occupy FCC points. Thus $K^{+}$ is present in all the tetrahedral voids. If we remove the cations, the anion ${PtCl}_{6}^{2 -}$ forms. FCC structure. The coordination number of ${PtCl}_{6}^{2 -}$ ions in FCC lattice is 8. Hence, the correct options are A, B and D.

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