Ferric oxide crystallises in a hcp of oxide ions with two

Last updated: 7/3/2023

Ferric oxide crystallises in a hcp of oxide ions with two out of every three octahedral voids occupie by ferric ions Derive the formula of ferric oxide In a closed packed arrangement there is one octahedral site corresponding to each ato constituting the lattice Therefore number of oxide ions per unit cell in hcp arrangement is 6 Number of octahedral voids 6 1 6 2 6x 4 3 Number of Fe 3 ions 6 x Formula of the compound Fe O 2 or is Fe O3 4 6