Which of the following is not true about the ionic solids? (i) Bigg...

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Which of the following is not true about the ionic solids?
(i) Bigger ions form the close packed structure.
\( \mathrm{P} \)
(ii) Smaller ions occupy either the tetrahedral or the octahedral voids depending upon their size.
W
(iii) Occupation of all the voids is not necessary.
(iv) The fraction of octahedral or tetrahedral voids occupied depends upon the radii of the ions occupying the voids.
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