<div class="csl-bib-body">
<div class="csl-entry">Weil, M., & Stöger, B. (2020). Thallium diphosphates. <i>Zeitschrift Für Naturforschung B</i>, <i>75</i>, 927–937. https://doi.org/10.1515/znb-2020-2108</div>
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dc.identifier.issn
0932-0776
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dc.identifier.uri
http://hdl.handle.net/20.500.12708/140729
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dc.description.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 TlH2P2O7(H2O)0.5 (C2/c, Z = 8) is isotypic with its potassium analogue, and triclinic Tl2P2O7 (P, 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.
