Assertion : An important feature of fluorite structure is that cations being large ib size occupy `FC C` lattice points, the formula unit `AB_(2)` (A cation, B anion)
Reason: There are `6` cations and `12` anions per `FC C` unit cell of the flucrite structure

Assertion:- Antigluorite structure is 4:8 (cation:anion) type coordination crystal. Reason:- Ratio of no. of cation and anions in CaF_(2) crystal is 1:2

Assertion:- Antifluorite structure is 4:8 (cation:anion) type coordination crystal. Reason:- Ratio of no. of cation and anions in CaF_(2) crystal is 1:2

Consider an fcc lattice made of a metal cation (M^(6+)) and unit cell. The resultant structure would have

Assertion (A) : In Rock salt type structuires, all the coctahedral voids in the close packing of anions are occupied by cations. Reason(R): In Rock salt structure, the distance of closest apprach between two anions is equal to hal the face diagonal of unit cell.

Assertion : A simplified coordination number ratio for ions of any ionic crystal is inverse of molar ratio. Reason : Coordination number ratio of cation to anion in CaF_(2) (fluorite structure) is 8 : 4.