An alloy of copper,silverand gold is found to have copper constituting the fcc lattice if silver atoms occupy the edge centres and gold is present at body centre the alloy has a formula ?
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Effective no. of Cu atoms in a unit cell =8×18+6×12
= 1+3 = 4
Effective No. of Ag atoms in a unit cell = 12×14
=3
Effective no. of Au atoms in a unit cell = 1
So, general formula of compound is Cu4Ag3Au
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