ferric oxide crystallizes in a hexagonal close packed array of oxide ions with 2 out of every three octahedral holes occupied by ferric oxide ions.derive the formula of ferric oxide???
No. of oxide ion per unit cell = 6
No. of octahedral holes = 6 x 1 = 6
No. of Fe3+ ions = 6 x 2/3 = 4
Fromula of the compund = Fe4O6 or Fe2O3
No. of octahedral holes = 6 x 1 = 6
No. of Fe3+ ions = 6 x 2/3 = 4
Fromula of the compund = Fe4O6 or Fe2O3