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Temperature and com...
Temperature and composition induced phase transitions in Sr2-xCa1+xTeO6 (0 <= x <= 2) double perovskite oxides
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- Tamraoui, Y. (author)
- Univ Hassan 1er, LS3M, Khouribga 25000, Morocco.
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- Manoun, Bouchaib (author)
- Univ Hassan 1er, LS3M, Khouribga 25000, Morocco.;Mohammed VI Polytech Univ, Ctr Adv Mat, Lot 660 Hay Moulay Rachid, Ben Guerir 43150, Morocco.
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- Mirinioui, F. (author)
- Univ Hassan 1er, LS3M, Khouribga 25000, Morocco.
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- Saadoune, I. (author)
- Mohammed VI Polytech Univ, Ctr Adv Mat, Lot 660 Hay Moulay Rachid, Ben Guerir 43150, Morocco.;Univ Cadi Ayyad, FST Marrakech, LCME, Av A Khattabi, Marrakech 40000, Morocco.
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- Haloui, R. (author)
- Univ Hassan 1er, LS3M, Khouribga 25000, Morocco.
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- Elhachmi, A. (author)
- Univ Hassan 1er, LS3M, Khouribga 25000, Morocco.
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- Saad, E. (author)
- Univ Hassan 1er, Lab Physicochim Proc & Mat PCPM, Fst Settat, Morocco.
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- Lazor, Peter (author)
- Uppsala universitet,Mineralogi, petrologi och tektonik
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Univ Hassan 1er, LS3M, Khouribga 25000, Morocco Univ Hassan 1er, LS3M, Khouribga 25000, Morocco.;Mohammed VI Polytech Univ, Ctr Adv Mat, Lot 660 Hay Moulay Rachid, Ben Guerir 43150, Morocco. (creator_code:org_t)
- Elsevier BV, 2017
- 2017
- English.
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In: Journal of Molecular Structure. - : Elsevier BV. - 0022-2860 .- 1872-8014. ; 1131, s. 103-113
- Related links:
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https://urn.kb.se/re...
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https://doi.org/10.1...
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Abstract
Subject headings
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- Structures of Sr2-xCa1+xTeO6 double perovskites have been studied by the profile analysis of X-ray diffraction data and Raman spectroscopy at room temperature. This series adopts a monoclinic symmetry for the compositions (0 <= x <= 0.5) with P2(1)/n as space group and a triclinic system with P (1) over bar space group for the compositions (0.5 < x <= 2). These results were confirmed by the observed tolerance factor calculated from the distances obtained from the Rietveld refinements which indicates that the true tilt system for the compositions range (0.5 < x <= 2) is the triclinic tilt system. Clear changes in the Raman modes centered at 600, 610 and 620 cm(-1) and the FWHM of O-Te-O bending vibrations, centered at 738 cm(-1) confirmed that the triclinic symmetry takes place between the compositions x = 0.5 and x = 1. Furthermore, Raman spectroscopy studies at high temperature were done for Ca3TeO6. For this compound, considerable changes in the temperature dependence of the modes were well illustrated.
Subject headings
- NATURVETENSKAP -- Geovetenskap och miljövetenskap -- Geokemi (hsv//swe)
- NATURAL SCIENCES -- Earth and Related Environmental Sciences -- Geochemistry (hsv//eng)
Keyword
- Inorganic compounds
- X-ray diffraction
- Raman spectroscopy
- Crystal structure
- Phase transition
Publication and Content Type
- ref (subject category)
- art (subject category)
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