Solid StateHard

Question

An ionic compound has a unit cell consisting of A ions at the corners of a cube and B ions on the centres of the faces of the cube. The empirical formula for this compound would be

Options

A.AB
B.A2B
C.AB3
D.A3B

Solution

A = × 8 = 1
(Corner)
B = × 6 = 3
(Face centre)
∴     AB3

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