Gaseous StateHard
Question
A substance AxBy crystallizes in a face-centred cubic (fcc) Lattice in which atoms ′A′ occupy each corner of the cube and atom ′B′ occupy the centres of eqch face of the cube. Identify the correct composition of the substance AxBy.
Options
A.AB3
B.A4B3
C.A3B
D.composition cannot be specified
Solution
A at f. c. c. thus A = 
= 1
and B at centre thus B =
× 6 = 3
Thus formula is AB3
= 1and B at centre thus B =
× 6 = 3Thus formula is AB3
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