In a cubic close packed structure of mixed oxides, the lattice is made up of oxide ions, one eigth of the tetrahedral voids are occupied by divalent ions `(A^(2+))` while one half of octrahedral voids are occupied by trivalent ions `(B^(3+))`. What is the formula of the oxide?

In a solid, oxide ions are aranged in ccp. One sixth of the tetrahedral voids and occupied by the cations A and one third of the octahedral voids and occupied by the cations B. what is the formula of the compound?

In a normal spinel structure O^(2-) ions form fcc packing and 1/8 of the tetrahedral sites are occupied by divalent metal, A^(2+) ions and half of the octahedral sites are occupied by trivalent metal B^(3+) ions, what is the ratio of the tetrahedral/octahedral sites: occupied in spinel structure.

In the spinel structur, oxides ions are cubical-closet packed whereas 1/8th of tetrahedral voids are occupied by A^(2+) cation and 1/2 of octahedral voids are occupied by B^(+) cations. The general formula of the compound having spinel structure is:

A spinel is an important class of oxide consisting two types of metal ions withs the oxide ions arranged in ccp layers . The normal spinel has one -eight of the tetrahendral holes occupied by one type of metal ions and one- half of the octaherdral holes occupied by another type of metal ion. Such a spine is formed by Mg^(2+), Al^(3+) and O^(2-) . The netutrality of the crystal is benig maintained. Type of hole occupied by Al^(3+) ions is:

Ferric oxide crystallizes in a hexagonal close pakced array of oxide ions with two out of every three octahedral holes occupied by ferric ions. Derive the formula of the ferric oxide.

A spinel is an important class of oxide consisting two types of metal ions with the oxide ions arranged in ccp layers . The normal spinel has one -eight of the tetrahedral holes occupied by one type of metal ions and one- half of the octahedral holes occupied by another type of metal ion. Such a spinel is formed by Mg^(2+), Al^(3+) and O^(2-) . The neutrality of the crystal is being maintained. The formula of the spinel is :

Grerric oxide crystalises in a hexagonal close-packed array of oxide ions with two out of every three octahedral holes occupied by ferric ions. Derive the formula of a ferric oxide.

In a solid, oxide ions are arrnged in ccp, cations A occupy A occupy (1/8)^th of the tetrahedral voids and cation B occupy (1/4)^(th) of the octahedral voids. The formula of the compound is:

What is the radius of ratio (r^+/r^-) for an ion to occupy: tetrahedral void.