Ferric-Ferrous Equilibria at 1 Bar by A.A.Borisov et al., 1989 Add analyses to this textarea use current ( Sample T lg_fO2 SiO2 TiO2 Al2O3 Fe2O3 FeO MnO MgO CaO Na2O K2O ) programming by Bychkov Kirill (kbs@na.ru)