D. Mercurio, J.C. Champarnaud-Mesjard, I. Gouby, B. Frit
{"title":"On the crystal structure of Bi2Te2O7","authors":"D. Mercurio, J.C. Champarnaud-Mesjard, I. Gouby, B. Frit","doi":"10.1016/S0992-4361(98)80014-3","DOIUrl":null,"url":null,"abstract":"<div><p>Bi<sub>2</sub>Te<sub>2</sub>O<sub>7</sub> is orthothobic, space group Pbcn. The lattice parameters derived from a Guinier powder pattern (Si standard) are: a= 22.794 ± 0.005, b= 5.526 ± 0.001, c= 22.065 ± 0.005Å, z= 16. The structure was solved by analysis of single crystal X-ray data and refined on the basis of neutron powder diffraction data. It is an anion-deficient 4: 1: 4 superstructure of fluorite in which the electron lone-pairs of tellurium are stereochemically active. The structural relationships with fluorite and with Bi<sub>2</sub>TeO<sub>5</sub> (and other anion-deficient fluorite-related superstructures) have been shown and discussed.</p></div>","PeriodicalId":100507,"journal":{"name":"European Journal of Solid State and Inorganic Chemistry","volume":"35 1","pages":"Pages 49-65"},"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)80014-3","citationCount":"13","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/S0992436198800143","RegionNum":0,"RegionCategory":null,"ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"","JCRName":"","Score":null,"Total":0}
引用次数: 13
Abstract
Bi2Te2O7 is orthothobic, space group Pbcn. The lattice parameters derived from a Guinier powder pattern (Si standard) are: a= 22.794 ± 0.005, b= 5.526 ± 0.001, c= 22.065 ± 0.005Å, z= 16. The structure was solved by analysis of single crystal X-ray data and refined on the basis of neutron powder diffraction data. It is an anion-deficient 4: 1: 4 superstructure of fluorite in which the electron lone-pairs of tellurium are stereochemically active. The structural relationships with fluorite and with Bi2TeO5 (and other anion-deficient fluorite-related superstructures) have been shown and discussed.
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