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Acta Crystallographica Section C: Structural ChemistryVolume 71, 1 April 2015, Pages 330-337

An investigation of polyhedral deformation in two mixed-metal diarsenates: SrZnAs2O7 and BaCuAs2O7(Article)(Open Access)

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  • aUniversity of Belgrade, Faculty of Mining and Geology, Laboratory of Crystallography, Dušina 7, Belgrade, 11000, Serbia
  • bUniversität Wien, Institut für Mineralogie und Kristallographie, Althansstrasse 14, Vienna, A-1090, Austria

Abstract

Two isostructural diarsenates, SrZnAs2O7 (strontium zinc diarsenate), (I), and BaCuAs2O7 [barium copper(II) diarsenate], (II), have been synthesized under hydrothermal conditions and characterized by single-crystal X-ray diffraction. The three-dimensional open-framework crystal structure consists of corner-sharing M2O5 (M2 = Zn or Cu) square pyramids and diarsenate (As2O7) groups. Each As2O7 group shares its five corners with five different M2O5 square pyramids. The resulting framework delimits two types of tunnels aligned parallel to the [010] and [100] directions where the large divalent nine-coordinated M1 (M1 = Sr or Ba) cations are located. The geometrical characteristics of the M1O9, M2O5 and As2O7 groups of known isostructural diarsenates, adopting the general formula M1II M2IIAs2O7 (M1II = Sr, Ba, Pb; M2II = Mg, Co, Cu, Zn) and crystallizing in the space group P21/n, are presented and discussed. © 2015 International Union of Crystallography.

Author keywords

barium-coppercrystal structurediarsenateshydrothermal synthesispolyhedral deformationstrontium-zincX-ray diffraction

Indexed keywords

Engineering controlled terms:BariumBarium compoundsCopperDeformationHydrothermal synthesisLeadSingle crystalsStrontiumX ray diffractionZinc
Engineering uncontrolled termsCorner sharingdiarsenatesGeneral formulasGeometrical characteristicsHydrothermal conditionsOpen frameworksSingle crystal x-ray diffractionSquare pyramid
Engineering main heading:Crystal structure
  • ISSN: 20532296
  • CODEN: ACSCG
  • Source Type: Journal
  • Original language: English
  • DOI: 10.1107/S2053229615005616
  • Document Type: Article
  • Publisher: International Union of Crystallography

  Kovač, S.; University of Belgrade, Faculty of Mining and Geology, Laboratory of Crystallography, Dušina 7, Belgrade, Serbia;
© Copyright 2017 Elsevier B.V., All rights reserved.

Cited by 4 documents

Dordević, T. , Gerger, S. , Karanović, L.
Hydrothermal and ionothermal synthesis of mineral-related arsenates in the system CdO-MO-As2O5 (M2+ = Mg, Co, Ni, Cu, Zn) and their crystal structures
(2017) European Journal of Mineralogy
Dordević, T. , Kolitsch, U. , Nasadala, L.
A single-crystal X-ray and Raman spectroscopic study of hydrothermally synthesized arsenates and vanadates with the descloizite and adelite structure types
(2016) American Mineralogist
Weil, M.
The isotypic family of the diarsenates MM′As2O7 (M = Sr, Ba; M′ = Cd, Hg)
(2016) Zeitschrift fur Naturforschung - Section B Journal of Chemical Sciences
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