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Title

Isosymmetric structural phase transition of the orthorhombic lanthanum gallate structure as a function of temperature determined by Rietveld analysis

AuthorsTang, Y. Q.; López-Cartes, C.; Avilés Escaño, Miguel Ángel ; Córdoba, J.M.
Issue Date7-Oct-2018
PublisherRoyal Society of Chemistry (UK)
CitationCrystEngComm 20(37): 5562-5569 (2018)
AbstractHigh energy planetary ball milling has been used to synthesize pseudo-cubic highly-pure LaGaO in one hour from its oxide components in an air atmosphere. Calcination at different temperatures led to the crystallization of lanthanum gallate in an orthorhombic structure with its local lanthanum coordination number environment changing from 12 to 7 when the temperature was increased. This change was attributed to the thermal expansion of the Ga-O bonds that varied non-monotonically inducing GaO tilting. Rietveld analysis, Raman spectroscopy, and transmission electron microscopy were used to elucidate the LaGaO structures at different temperatures.
Publisher version (URL)http://doi.org/10.1039/C8CE00726H
URIhttp://hdl.handle.net/10261/193282
DOIhttp://dx.doi.org/10.1039/c8ce00726h
E-ISSN1466-8033
Appears in Collections:(ICMS) Artículos
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