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 for the compound??
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Atoms of Y occupy the corners of the cube.
=> Number of Y atoms in a unit cell = 8 x 1/8 = 1
The atom of X occupies the body centre.
=> Number of Y atoms in a unit cell = 1
Therefore, the ratio of the number of X atoms to the number of Y atoms;
X : Y = 1 : 1
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