Solid StateHard
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
View Solution FreeMore Solid State Questions
The packing efficiency of the two-dimensional square unit cell shown below is...A transition metal M can exist in two oxidation states +2 and +3. It forms an oxide whose experimental formula is given ...An ionic solid is HCP of Q2− ions and Px+ ions are in half of the tetrahedral voids. The value of x should be...If the anions (A) form hexagonal closest packing and cations (C) occupy only 2/3 octahedral voids in it, then the genera...The number of next nearest neighbours of Cs+ ion in CsCl crystal is...