An investigation of polyhedral deformation in two mixed-metal diarsenates: SrZnAs<sub>2</sub>O<sub>7</sub> and BaCuAs<sub>2</sub>O<sub>7</sub>
- Author(s)
- Sabina Kovac, Ljiljana Karanovic, Tamara Đorđević
- Abstract
Two isostructural diarsenates, SrZnAs2O7 (strontium zinc diarsenate), (I), andBaCuAs2O7 [barium copper(II) diarsenate], (II), have been synthesized underhydrothermal conditions and characterized by single-crystal X-ray diffraction.The three-dimensional open-framework crystal structure consists of cornersharingM2O5 (M2 = Zn or Cu) square pyramids and diarsenate (As2O7) groups.Each As2O7 group shares its five corners with five different M2O5 squarepyramids. The resulting framework delimits two types of tunnels aligned parallelto the [010] and [100] directions where the large divalent nine-coordinated M1(M1 = Sr or Ba) cations are located. The geometrical characteristics of theM1O9 , M2O5 and As2O7 groups of known isostructural diarsenates, adoptingthe general formula M1IIM2IIAs2O7 (M1II = Sr, Ba, Pb; M2II = Mg, Co, Cu, Zn)and crystallizing in the space group P21/n, are presented and discussed.
- Organisation(s)
- Department of Mineralogy and Crystallography
- External organisation(s)
- University of Belgrade
- Journal
- Acta Crystallographica. Section C: Crystal Structure Communications
- Volume
- C71
- Pages
- 330-337
- No. of pages
- 8
- ISSN
- 0108-2701
- DOI
- https://doi.org/10.1107/S2053229615005616
- Publication date
- 03-2015
- Peer reviewed
- Yes
- Austrian Fields of Science 2012
- 104017 Physical chemistry, 104011 Materials chemistry, 105113 Crystallography
- Keywords
- ASJC Scopus subject areas
- Condensed Matter Physics, Materials Chemistry, Inorganic Chemistry, Physical and Theoretical Chemistry
- Portal url
- https://ucrisportal.univie.ac.at/en/publications/an-investigation-of-polyhedral-deformation-in-two-mixedmetal-diarsenates-srznas2o7-and-bacuas2o7(2f15b50a-e57d-40d7-bbc3-02b49a863250).html