An alloy of `Cu, Ag` and `Au` is found to have copper constituting the `c.c.p.` lattice. If `Ag` atom occupy the edge centres and `Au` atom is present at body centre, the formula of this alloy is `:`
A
`Cu_(4)Ag_(4)Au`
B
`Cu_(4)Ag_(2)Au`
C
`CuAgAu`
D
`Cu_(4)Ag_(3)Au`
Text Solution
Verified by Experts
The correct Answer is:
d
In each unit cell, `Cu-` atoms `8xx(1)/(2)+6xx(1)/(2)=4` `Ag-` atoms `=12xx(1)/(4)=3` `Au` atoms`=1xx1=1` `:. ` Formula is `Cu_(4)Ag_(3)Au.`
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