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X-ray powder diffraction study of CaTiO3 perovskite at high temperatures

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Abstract

CaTiO3 perovskite has been studied at high temperature and P = 1 bar by powder x-ray diffraction and its structure refined subsequently by the Rietveld method. This Pbnm perovskite shows a decrease of orthorhombic distortion with increasing temperature as manifested by the increasing of the inter-octahedral angles towards 180°. Linear thermal expansion is observed for CaTiO3 to 1373 K; extrapolation of these data suggest a possible transition to a tetragonal or pseudo-tetragonal phase near 1600 K.

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Authors and Affiliations

  1. Center for High Pressure Research, and Department of Earth and Space Sciences, State University of New York at Stony Brook, 11794, Stony Brook, NY, USA

    Xing Liu & Robert C. Liebermann

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  1. Xing Liu
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  2. Robert C. Liebermann
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Liu, X., Liebermann, R.C. X-ray powder diffraction study of CaTiO3 perovskite at high temperatures. Phys Chem Minerals 20, 171–175 (1993). https://doi.org/10.1007/BF00200119

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  • DOI: https://doi.org/10.1007/BF00200119

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