Question
Tue April 15, 2014 By: Abhilasha T.

A binary solid AB with B negative ions constituting the FCC lattice and A positive ions occupying 25% tetrahedral holes.The formula is

a)AB

b)A2B

c)AB2

d)AB4

Expert Reply
Thu April 17, 2014
The formula of the binary solid having FCC arrangement and in which A positive ions occupy 25% tetrahedral voids will be option (C) AB2.
This is so because each there are two tetrahedral viods per each B anion.
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