A binary solid A+B- has a ZnS structure with B- ions constituting the lattice and A + ions occupying 25% tetrahedral holes.Formula of the solid is.?

No.of B- ions= 4 (Corners+ face centres)
No.of A+ ions= 1 (total there are 4 tetrahedral holes but in which only 25% is occupied i.e. only one void is occupied )
formula of solid= AB4

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