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Crystalline and Amorphous Solid

10. If A Atom...

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10. If A Atoms are present at corners of unit cell and b at alternate face centre then what is formuale AB of the compound

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A

present at corners and atoms

B

present at centre of each face. then what is the formula.

Q. Find the lowest possible empirical formula in an arrangement of unit cell where A atoms are present at corners and alternate face centers, B atoms are present at alternate edge centres and C atoms are present at half of the mid of line joining opposite face centers. Assume: Any atom present in the inner locations of the unit cell should be considered completely within the unit cell structure.

A B

has zinc blende structure with '

A

' atoms at corners and face centre of the unit cell. If all the atoms present in one body diagonal are removed, the simplest formula of the compound becomes

A_{x} B_{y}

(x + y)

Q. X,Y atoms crystallize in a cubic lattice . X atoms are present at the corners while Y atoms are at face centers. What would be the simplest formula of the compound if one of the Y atoms is missing from a face centre in each unit cell?

Q. In a unit cell, atoms

A, B, C

D

are present at corners, face-centres, body-centre and edge-centres respectively. If atoms touching one of the plane passing through two diagonally opposite edges are removed, then formula of compound is:

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