Sulfate y'Icyuma: Icyuma Gisimbura Umuringa

Icyuma gikora ibintu vuba kurusha umuringa, bityo icyuma gishyizwe mu mazi ya sulfate y'umuringa gifata umwanya w'umuringa: CuSO₄ + Fe → FeSO₄ + Cu. Umuringa usohoka ari icyuma maze amazi agahinduka sulfate y'icyuma(II), ferrous sulfate. (Inganda zibona inyinshi muri yo nk'ibisigazwa byo koza icyuma muri aside sulfurike, cyangwa zihindura pyrite.) Mu mazi akonje ihinduka ikristalu ari heptahydrate y'ubururu n'icyatsi, ibuye rya melanterite; hejuru ya 56.6 °C havuka tetrahydrate aho kuyo. Ferrous sulfate (copperas) yakoreshwaga mu wino wa iron gall, nk'igifatisha irangi mu gusiga ubwoya no gukora amarangi ya Mars.