Abstract
This paper describes a nondestructive and complete analysis of magnetite(FeO•Fe2O3)-maghemite(γ-Fe2O3) solid solutions including minor constituents: the proposed method consists of measurements of the lattice constant and X-ray
fluorescent determination of the minor constituents. The diffraction angles of the solid solution were corrected using a silicon internal standard for calculation of the lattice constant, a0. Intensity ratios of Mn Kα/Fe Kα and Zn Kα/Fe Kα were measured for the determination of manganese and zinc and for the correction of the lattice constant due to the minor elements. The final analysis was done using the linear relation between a0 and the sum total of converted mole percentages of divalent metal oxides. Differences between the analytical results obtained by the present method and those obtained by the wet methods were within 3.4 wt% for Fe2O3, within 1.5 wt% for FeO, and within 0.08 wt% for MnO and ZnO. Time required for a complete analysis is about 30min.
