• Title of article

    New mixed aluminium–chromium diarsenate

  • Author/Authors

    Bouhassine, Mohamad Alem Laboratoire de Materiaux et Cristallochimie - Faculté des Sciences de Tunis, Tunisia , Boughzala, Habib Laboratoire de Materiaux et Cristallochimie - Faculté des Sciences de Tunis, Tunisia

  • Pages
    10
  • From page
    1
  • To page
    10
  • Abstract
    Potassium chromium aluminium diarsenate, KCr1/4Al3/4As2O7, was prepared by solid-state reaction. The structure consists of (Cr1/4/Al3/4)O6 octa­hedra and As2O7 diarsenate groups sharing corners to build up a three-dimensional anionic framework. The potassium cations are located in wide channels running along the c-axis direction. The crystal structure is isostructural with the triclinic AIMIIIX2O7 (AI = alkali metal; MIII = Al, Cr, Fe; X = As, P) compounds. However, the MIII octa­hedrally coordinated site is 25% partially occupied by chromium and 75% by aluminium.
  • Keywords
    crystal structure , single crystal diffraction , mixed occupancy , channel structure , diarsenate
  • Journal title
    Acta Crystallographica Section E: Crystallographic Communications
  • Serial Year
    2017
  • Full Text URL
    journals.iucr.org/e/issues/2017/03/00/pj2041/pj2041.pdf
  • Record number

    2621331

    • Link To Document
    https://search.isc.ac/dl/search/defaultta.aspx?DTC=10&DC=2621331