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.
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