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Question
Atoms X and Y form bcc crystalline structure. Atom X is present at the corners of the cube and Y is at the centre of the cube. What is the formula of the compound?
Solution
Atoms X and Y form bcc crystalline structure. Atom X is present at the corners of the cube Atom Y is present at the centre of the cube.
No. of atoms of X in the unit cell = `"N"_"c"/8 = 8/8` = 1
No. of atoms of Y in the unit cell = `"N"_"b"/1 = 1/1` = 1
Ratio of atoms X : Y = 1 : 1
Hence formula of the compound = XY.
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