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Coordination Complexes

in a cubic la...

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in a cubic lattice if atom are present only at all the corner and alternate face centrwvthen the packing efficiency will b

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In a unit cell, atoms A are present at all corner lattices, B atoms are present at alternate faces and all edge centers. Atoms C is present at face centers left from B and one at each body diagonal at a distance of

\frac{1}{4}

th of body diagonal from the corner.

The formula of the given solid is :

Q. There are three ionic compounds, first compound has fcc lattice of anions and cations are present in all tetrahedral voids, second compound has fcc lattice of anions and cations are present in all octahedral voids and the third compound has simple cubical lattice in which cubical void is occupied by cation, then the order of packing efficiency of these will be :

Q. A and B atoms crystallize in cubic lattice. A atoms are present at the corners while B atoms are at face centers. What would be the simplest formula of the compound if two of the A atoms are missing from each unit cell?

Q. If in a cubic cell, atoms

A

present at all corners and atoms

B

at the center of each face. What will be the molecular formula of the compound, if all the atoms present in one body diagonal are replaced by atom

C

?

Q. In a face centered cubic lattice, atoms A are at the corner points and atoms B at the face centered points. If atom B is missing from one of the face centered points, the formula of the ionic compound is:

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