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Structural characterization of the FeTiO₃-MnTiO₃ solid solution

Authors:	Xiang Wu Shan Qin

Institution:	^a Key Laboratory of Orogenic Belts and Crustal Evolution, MOE, Peking University and School of Earth and Space Sciences, Peking University, Beijing 100871, China ^b Bayerisches Geoinstitut, Bayreuth University, Bayreuth D-95440, Germany

Abstract:	We have synthesized the (Mn_1−xFe_x)TiO₃ (0.0≤x≤1.0) solid solution compounds by high-temperature sintered methods, and characterized their crystal structures by combining X-ray diffraction, Mössbauer spectroscopy and Raman spectroscopy. Lattice constants and volumes show a linear decrease with increase in FeTiO₃ content. All experimental results illustrate a decreasing distortion of TiO₆ (or FeO₆/MnO₆) octahedra with increase in FeTiO₃ content. The vibrational frequency of OTiO bending motions presents a direct dependence on the corresponding bond angle (the ∠OTiO).

Keywords:	Ilmenite Solid solution X-ray diffraction Mö ssbauer spectroscopy Raman spectroscopy
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