The woodwardite group includes: honessite: (Ni1-xFe3+x)(SO4)x/2(OH)2.nH2O (x < 0.5, n < 3x/2) woodwardite: (Cu1-xAlx)(SO4)x/2(OH)2.nH2O (x < 0.5, n < 3x/2) Back to Minerals