dc.identifier.uri | http://www.repo.uni-hannover.de/handle/123456789/2433 | |
dc.identifier.uri | https://doi.org/10.15488/2407 | |
dc.contributor.author | Abriel, Walter | |
dc.contributor.author | du Bois, André | |
dc.date.accessioned | 2017-11-24T09:37:02Z | |
dc.date.available | 2017-11-24T09:37:02Z | |
dc.date.issued | 1989 | |
dc.identifier.citation | Abriel, W.; du Bois, A.: Die Kristallstrukturen von Verbindungen des Typs A2TeX6 (A = K, NH4, Rb, Cs; X = Cl, Br, I). In: Zeitschrift für Naturforschung - Section B Journal of Chemical Sciences 44 (1989), Nr. 10, S. 1187-1194. DOI: https://doi.org/10.1515/znb-1989-1007 | |
dc.description.abstract | With the determination of the crystal structure of (NH4)2TeI6 the list of the descriptions of A2TeX6 structures is further completed. At 293 K three structure types are observed with an antifluorite packing of cations and anions: The cubic K2PtCl6 type structure (space group Fm 3̄ m, Z = 4), the tetragonal Rb2TeI6 type structure (space group P4/mnc, Z = 2), and the monoclinic K2TeBr6 type structure (space group P21/n, Z = 2). The latter type was found for (NH4)2TeI6 with a = 8.0694(7), b = 8.0926(9), c = 11.7498(8) Å and β = 89.605(8)° and refined to a final Rw of 0.065. From ionic radii ratios the symmetry of the A2MX6 type structures can be predicted including a prediction of low temperature instability (soft mode condensation). Group-subgroup relationships connect the corresponding space groups and the space groups of the high/low temperature polymorphs. | eng |
dc.language.iso | ger | |
dc.publisher | Berlin : De Gruyter | |
dc.relation.ispartofseries | Zeitschrift für Naturforschung - Section B Journal of Chemical Sciences 44 (1989), Nr. 10 | |
dc.rights | CC BY-NC-ND 3.0 Unported | |
dc.rights.uri | https://creativecommons.org/licenses/by-nc-nd/3.0/ | |
dc.subject | Crystal Structure | eng |
dc.subject | Ferroelastics | eng |
dc.subject | Phase Transitions | eng |
dc.subject | Tellurates | eng |
dc.subject.ddc | 540 | Chemie | ger |
dc.title | Die Kristallstrukturen von Verbindungen des Typs A2TeX6 (A = K, NH4, Rb, Cs; X = Cl, Br, I) | ger |
dc.type | Article | |
dc.type | Text | |
dc.relation.essn | 1865-7117 | |
dc.relation.issn | 0932-0776 | |
dc.relation.doi | https://doi.org/10.1515/znb-1989-1007 | |
dc.bibliographicCitation.issue | 10 | |
dc.bibliographicCitation.volume | 44 | |
dc.bibliographicCitation.firstPage | 1187 | |
dc.bibliographicCitation.lastPage | 1194 | |
dc.description.version | publishedVersion | |
tib.accessRights | frei zug�nglich |
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