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Open Access RbFe(HAsO4)2 and TlFe(HAsO4)2, two new hydrogenarsenates adopting two closely related structure types

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Rubidium iron bis[hydrogen arsenate(V)], RbFe(HAsO4)2, and thallium iron bis[hydrogen arsenate(V)], TlFe(HAsO4)2, were grown under mild hydrothermal conditions (T = 493 K, 7 d). RbFe(HAsO4)2 adopts the RbFe(HPO4)2 structure type (space group Roverline{3}c), while TlFe(HAsO4)2 crystallizes in the (NH4)Fe(HPO4)2 structure type (space group Poverline{1}). Both compounds have tetrahedral–octahedral framework topologies. The M+ cations are located in channels of the respective framework and are disordered in TlFe(HAsO4)2, which may suggest that the M+ cations can move in the channels.
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Document Type: Research Article

Affiliations: 1: Institute for Chemical Technology and Analytics, Division of Structural Chemistry, TU Wien, Getreidemarkt 9/164-SC, 1060 Vienna, Austria 2: Naturhistorisches Museum, Burgring 7, 1010 Wien, and Institut für Mineralogie und Kristallographie, Universität Wien, Althanstrasse 14, 1090 Wien, Austria

Publication date: January 1, 2018

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