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Ionic Compounds: Chemical Formula

If in a mixed...

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If in a mixed oxide of elements A and B, the oxide ions are arranged in CCP lattice and cations (A2+) occupy 12.5% of tetrahedral voids and cation (B3+) occupy 50% octahedral voids, the formula of the oxide is

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Q. In a closed packed structure of mixed oxides, the lattice is composed of mixed oxides ions. One-eighth of tetrahedral voids are occupied by divalent cations

(A^{2 +})

while one half of octahedral voids are occupied by trivalent cations

(B^{3 +})

. The formula of mixed oxide is :

Q. In a solid, oxide ions

(O^{2 -})

are arranged in ccp, cation

(A^{3 +})

occupy one-sixth of tetrahedral void and cations

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occupy one-third of the octahedral voids. What is the formula of the compound?

Q. In a compound

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oxide ions are arranged in ccp and cations A are present in octahedral voids. Cations B are equally distributed among octahedral and tetrahedral voids. The fraction of the octahedral voids occupied is :

Q. In a compound, oxides ions form fcc lattice, whereas

\frac{1}{4} t h

of tetrahedral voids are occupied by cations

A^{2 +}

\frac{1}{8} t h

of octahedral voids are occupied by cations

B^{3 +}

ions. The simplest formula of the compound is

Q. In a close-packed structure of mixed oxides, the lattice is composed of oxide ions, one-eighth of tetrahedral voids are occupied by divalent cations

A

while one-half of octahedral voids are occupied by trivalent cations

B

. The formula of the oxide is:

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