Select the incorrect statement(s) (a) The C.N. of cation occupying a tetrahedral hole is 4 (b) T...

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Select the incorrect statement(s)
(a) The C.N. of cation occupying a tetrahedral hole is 4
(b) The C.N. of cation occupying a octahedral hole is 6
(c) In schottky defects, density of the lattice decreases
(d) In Frenkel defects, density of the lattice increases
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