1971 Volume 44 Issue 3 Pages 719-722
The solid solutions in the system FeO-Fe2O3-TiO2 were synthesized under hydrothermal conditions up to 700°C and 2.5 kb (PH2O). The results of X-ray diffraction, chemical and thermomagnetic analyses indicated that the products always consisted of magnetite-ulvöspinel or hematite-ilmenite solid solutions and, in some cases, rutile was also formed. The presence of the solid solutions of magnetite and ulvöspinel indicates a reducing atmosphere during the treatment. When PH2O increased from 1 kb to 2.5 kb, the FeO contents in the products decreased.
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