Ferric oxide crystallises 'in a hexagonal close packed array of oxide ions with two out of ever three octahedral holes occupied by ferric. ion: Derive. the formula of the ferric oxide.

A material has cubic close packed (ccp) array of oxide ions with 'm' fraction of octahedral holes occupied by aluminium ions and 'n' fraction of tetrahedral holes cocupied by magnesium ions to form a perfect crystal, m and n, respectively, are

If the unit cell of a material has cubic close packed array of oxygen atoms with m fraction of octahedral holes occupied by aluminium ions and n fraction of tetrahedral holes occupied by magnesium ions, m and n respectively are

In a cubic close packed structure of mixed oxides, the lattice is composed of oxide.ions, one eighth of tetrahedral voids are occupied by divalent cations while one hálf of octahedral voids are occupied by trivalent cations. What is the formula of the oxide

In a cubic lattice, the close packed structure of mixed oxides of the lattice is made up of oxide ion, one eighth of the tetrahedral voids are occupied by divalent ions (X^(2+)) while one half of the octahedral voids are occupied by trivalent ions (Y^(3+)) . What is the formula of the oxide?

Agl crystallises in cubic close packed ZnS structure. What fraction of tetrahedral sites is occupied by Ag+ ions?

In a metal oxide the oxide ions are arranged in hexagonal close packing and metal ion occupy 2//3rd of the octahedral voids. The formula of the oxide is

In spinel structure, O^(2-) ions are cubic-close packed, where 1/8th of the tetrahedral holes are occupied by A^(2+) cations and 1/2 of the octahedral holes are occupied by cations B^(3+) . The general formula of this compound is