{"title":"Crystal structure of Ba2La4Ti5O18, member n = 6 of the homologous series (Ba,La)nTin−1O3n of cation deficient perovskite-related compounds","authors":"N. Harre, D. Mercurio, G. Trolliard, B. Frit","doi":"10.1016/S0992-4361(98)80016-7","DOIUrl":null,"url":null,"abstract":"<div><p>Ba<sub>2</sub>La<sub>4</sub>Ti<sub>5</sub>O<sub>18</sub> crystallizes in the trigonal system (space group R3) with the unit-cell parameters: a = 5.584 (1) Å; c = 41.176 (8) Å; Z= 3.</p><p>The structure has been solved from single crystal X-ray diffraction data to a final R<sub>1</sub> = 0.0285. Ba and La atoms are twelve-fold coordinated and Ti atoms six-fold coordinated. The structure can be described as consisting of identical perovskite-like blocks, five corner-sharing TiO<sub>6</sub> octahedra thick, separated by layers of vacant octahedra. The distortion of the cation and anion sublattices has been analysed and a Ba/La order has been evidenced.</p></div>","PeriodicalId":100507,"journal":{"name":"European Journal of Solid State and Inorganic Chemistry","volume":"35 1","pages":"Pages 77-90"},"PeriodicalIF":0.0000,"publicationDate":"1998-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1016/S0992-4361(98)80016-7","citationCount":"21","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"European Journal of Solid State and Inorganic Chemistry","FirstCategoryId":"1085","ListUrlMain":"https://www.sciencedirect.com/science/article/pii/S0992436198800167","RegionNum":0,"RegionCategory":null,"ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"","JCRName":"","Score":null,"Total":0}
引用次数: 21
Abstract
Ba2La4Ti5O18 crystallizes in the trigonal system (space group R3) with the unit-cell parameters: a = 5.584 (1) Å; c = 41.176 (8) Å; Z= 3.
The structure has been solved from single crystal X-ray diffraction data to a final R1 = 0.0285. Ba and La atoms are twelve-fold coordinated and Ti atoms six-fold coordinated. The structure can be described as consisting of identical perovskite-like blocks, five corner-sharing TiO6 octahedra thick, separated by layers of vacant octahedra. The distortion of the cation and anion sublattices has been analysed and a Ba/La order has been evidenced.
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