Question

Whe be so ( 0^{2} ), in the crystap vetatedral varide 2 so Qefsehedral voide ( =2 times 0 mathrm{cta} )
[
begin{array}{r}
2160
A^{3+}, text { isne } 2 frac{1}{r} times 160=20
end{array}
]
( 3^{3+text { ione }} frac{21}{2} times 60=40 )
[
A^{2}+3^{3+}: 0^{2}=20: 40: 80
]
( int_{text {Umato }}, A_{1 / 3}, 0_{4}, 21: 2: 4 )

# Example 80. In a cubic lattice, the closed packed struc- ture of mixed oxides of the lattice is made up of oxide ions; one eighth of the tetrahedral voids are occupied by divalent ions (A2+) while one half of the octahedral voids are occupied by trivalent ions (B3). What is the formula of the oxides?

Solution