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Investigation into high-pressure behavior of MnTiO3: X-ray diffraction and Raman spectroscopy with diamond anvil cells
2011
Geoscience Frontiers
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The structural stability of manganese titanate MnTiO 3 at high pressure was investigated by X-ray diffraction and Raman spectroscopy with diamond anvil cells. Ilmenite-type MnTiO 3 is stable at least to 26.6 GPa, and lithium niobate type MnTiO 3 reversibly transforms at room temperature to perovskite at 2.0 GPa. Bulk moduli (K 300 ) of ilmenite, lithium niobate and perovskite are 174(4) GPa, 179 (8) GPa, and 208(5) GPa, respectively (at fixed first pressure derivative K 0 Z 4). The Grüneisen
doi:10.1016/j.gsf.2010.09.003
fatcat:y36g6wgqc5cttlkqcdkz3dwq64