Thallium diphosphates
Author:
Weil Matthias1ORCID, Stöger Berthold2ORCID
Affiliation:
1. Institute for Chemical Technologies and Analytics, Division of Structural Chemistry, TU Wien , Getreidemarkt, 9/164-SC , A-1060 Vienna , Austria 2. X-Ray Centre, TU Wien , Getreidemarkt 9 , A-1060 Vienna , Austria
Abstract
Abstract
Three thallium(I) diphosphates with compositions Tl4P2O7, Tl2H2P2O7, Tl2H2P2O7(H2O)0.5 and the mixed-valent thallium(I,III) diphosphate Tl2P2O7 (= TlITlIIIP2O7) were obtained from aqueous solutions using an ion-exchange resin (Tl4P2O7), through thermal treatment of TlH2PO4 at 190 °C and subsequent crystallization from aqueous solutions (Tl2H2P2O7, Tl2H2P2O7(H2O)0.5), and from a phosphate flux at 220 °C (Tl2P2O7). The crystal structures of monoclinic Tl4P2O7 (C2/c, Z = 4) and orthorhombic Tl2H2P2O7 (Pbca, Z = 8) are unique, whereas monoclinic Tl2H2P2O7(H2O)0.5 (C2/c, Z = 8) is isotypic with its potassium analogue, and triclinic Tl2P2O7 (P
1
‾
$‾{1}$
, Z = 4) crystallizes in the TlInAs2O7 structure type. The crystal structure of Tl2P2O7 is related to that of In2P2O7 (= InIInIIIP2O7; P21/c, Z = 4) by a translationengleiche group-subgroup relationship (t2). IR spectra of Tl4P2O7, Tl2H2P2O7 and Tl2P2O7 are reported and discussed.
Publisher
Walter de Gruyter GmbH
Subject
General Chemistry
Reference59 articles.
1. Gmelins Handbuch der Anorganischen Chemie, 8th ed., Thallium 34; Verlag Chemie: Berlin, 1940; pp. 427–432. 2. Oh, I. H., Merz, M., Mattauch, S., Heger, G. Acta Crystallogr. 2006, B62, 719–728; https://doi.org/10.1107/s0108768106018222. 3. Oddon, Y., Vignalou, J. R., Tranquard, A., Pepe, G. Acta Crystallogr. 1979, B35, 2525–2528; https://doi.org/10.1107/s0567740879009821. 4. Oh, I. H. Strukturelle Phasenübergänge in TlH2PO4 und Kristallstrukturen von Rb0.7Tl0.3H2PO4 und Rb0.5Tl0.5H2PO4. Dissertation, RWTH Aachen, Aachen, 2005. 5. Zalkin, A., Templeton, D. H., Eimerl, D., Velsko, S. P. Acta Crystallogr. 1986, B42, 1686–1687; https://doi.org/10.1107/s0108270186090935.
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