Solid StateMedium
Question
MgAl2O4, is found in the Spinal structure in which O2- ions constitute CCP lattice, Mg2+ ions occupy 1/8th of the Tetrahedral voids and Al3+ ions occupy 1/2 of the Octahedral voids.
Find the total +ve charge contained in one unit cell.
Find the total +ve charge contained in one unit cell.
Options
A.+7/4 electronic charge
B.+6 electronic charge
C.+2 electronic charge
D.+8 electronic charge
Solution
Total positive charge = Charge on Mg2+ + Charge on Al3+
=
× 8 × 2 + 
× 4 × 3 = 8 electronic charge.
=
× 8 × 2 + × 4 × 3 = 8 electronic charge. Create a free account to view solution
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