In Chrysoberyl, a compound containing Beryllium, Aluminium and oxygen, oxide ions form cubic close packed structure. Aluminium ions occupy 1/4 text th of tetrahedral voids and Beryllium ions occupy 1/4 text th of octahedral voids. The formula of the compound is

Question

In Chrysoberyl, a compound containing Beryllium, Aluminium and oxygen, oxide ions form cubic close packed structure. Aluminium ions occupy 1/4 text th of tetrahedral voids and Beryllium ions occupy 1/4 text th of octahedral voids. The formula of the compound is (A) BeAlO 4 (B) BeAl 2 O 4 (C) Be 2 AlO 2 (D) BeAlO 2

Tardigrade Admin · Accepted Answer

CCP = N =4 Octahedral void = N =1 × 4=4 × (1/4)=1: Be Tetrahedral void =2 N =2 × 4=2 × (1/4)=2: A l

Q. In Chrysoberyl, a compound containing Beryllium, Aluminium and oxygen, oxide ions form cubic close packed structure. Aluminium ions occupy $1/ 4^{th}$ of tetrahedral voids and Beryllium ions occupy $1/ 4^{th}$ of octahedral voids. The formula of the compound is

$B e A l O_{4}$

$B e A l_{2} O_{4}$

$B e_{2} A l O_{2}$

$B e A l O_{2}$

$CCP = N = 4$
Octahedral void $= N = 1 \times 4 = 4 \times \frac{1}{4} = 1 : B e$
Tetrahedral void $= 2 N = 2 \times 4 = 2 \times \frac{1}{4} = 2 : A l$

Q. In Chrysoberyl, a compound containing Beryllium, Aluminium and oxygen, oxide ions form cubic close packed structure. Aluminium ions occupy 1/4 th of tetrahedral voids and Beryllium ions occupy 1/4 th of octahedral voids. The formula of the compound is

BeAlO4​

BeAl2​O4​

Be2​AlO2​

BeAlO2​