In2O3 lattice unit cell includes 80 atoms per unit cell in the bixbyite Ia3 structure.This corresponds to 16 In2O3 "molecules", each having 8 electrons,
Number of valence electrons is 2x3(for In)+3*6(for O)=24 16 units x 24 = 384 electrons 384 / 2 =192 bands Regards K
