Acta Crystallographica Section E

Structure Reports Online

Volume 70, Part 1 (January 2014)


inorganic compounds



Acta Cryst. (2014). E70, i6    [ doi:10.1107/S1600536813033850 ]

The aluminoarsenate Na1.67K1.33Al3(AsO4)4

M. A. Bouhassine and H. Boughzala

Abstract: The title compound, sodium potassium trialuminium tetra­kis­(orthoarsenate), was prepared by solid-state reactions. The anionic framework consists of corrugated layers parallel to (010) and is made up of corner-sharing AlO6 octa­hedra (site symmetries .2. and 2/m..) that are connected to isolated AsO4 tetra­hedra (site symmetries .2. and m..) through edge- and corner-sharing. The alkali cations are occupationally disordered. The two K+ cations [site symmetries .2. and m..; occupancies 0.314 (7) and 0.035 (12)] are situated in the inter­layer space, whereas the smaller Na+ cations [both with site symmetry m..; occupancies = 0.725 (14) and 0.112 (14)] are located in the cavities of the anionic framework. The K+ cations are surrounded by six and seven O atoms, the Na+ cations by seven and nine O atoms. The resulting coordination polyhedra of the two types of cations are highly distorted.


htmldisplay filedownload file

Hyper-Text Markup Language (HTML) file
[ doi:10.1107/S1600536813033850/wm2786sup0.html ]
Supplementary materials


Notes:

To open or display or play some files, you may need to set your browser up to use the appropriate software. See the full list of file types for an explanation of the different file types and their related mime types and, where available links to sites from where the appropriate software may be obtained.

The download button will force most browsers to prompt for a file name to store the data on your hard disk.

Where possible, images are represented by thumbnails.

 bibliographic record in  format

  Find reference:   Volume   Page   
  Search:     From   to      Advanced search

Copyright © International Union of Crystallography
IUCr Webmaster