What is the C.N. of octahedral void ?...

What is the C.N. of octahedral void ?

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What is the ratio of octahedral voids & number of lattice points in a FCC cyrstal structure?

A : The number of spheres are equal to the number of octahedral voids as well as tetrahedral void. R : Octahedral void and tetrahedral void has equal size.

In chromium (III) chloride CeCl_(3) chloride ions have cubic close packed arrangement and Cr (III) ions present in the octahedral voids. What fraction of the octahedral void is occupied ? What fraction of the total number of voids is occupied?

If r is the radius of the octahedral voids and R is the radius of the atom in close packing,then :

Which of the following statement is correct for a closet packed structure? (i) Each tetrahedral void is surrounded by 4 spheres and each sphere is surrounded by 8 tetrahedral voids. (ii) Each octahedral voids is surrounded by 6 spherus and each sphere is surrounded by 6 octahedral voids. (iii) The number of tetrahedral voids in a closest-packed arrangement is twice the number of spheres. (iv) The number of octahedral voids in a closest-packed arrangement is equal to the number of spheres.

Statement -1 : In NaCl crystal , all the octahdefral voids are occupied by Na^(+) ions. Statement-2 : The number of octahedral voids is equal to the number of Cl^(-) ions in the packing .

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