Figure 4.
The XRD patterns obtained at different temperatures during TRXRD experiments using mixtures of 18.2% ZnFe2O4 + 81.8% FeSO4∙7H2O (a), 18.1% CuFe2O4 + 81.9% FeSO4∙7H2O (b), 17.2% ZnFe2O4 + 82.8% FeSO4∙7H2O (c) and 17.1% CuFe2O4 + 82.9% FeSO4∙7H2O (d), where a—ZnFe2O4; b—FeSO4∙4H2O; c—FeSO4∙H2O; d—FeSO4; e—Fe(OH)SO4; f—Fe2(SO4)3; g—Fe2O3; h—ZnSO4; i—CuFe2O4; k—CuSO4; l—Fe2(SO4)3∙5H2O; m—Fe2(SO4)3∙7H2O; n—Fe2(SO4)3∙9H2O.
