ab initio X-ray structure determination of NaAl(SO4)2

Authors

  • Mohamed Boujelbene Laboratory of the Physico-Chemistry of Solid States. LR11 ES51. of Sfax. Road of Soukra km 4. Sfax3071
  • T. Mhiri Laboratory of the Physico-Chemistry of Solid States. LR11 ES51. of Sfax. Road of Soukra km 4. Sfax3071

DOI:

https://doi.org/10.24297/jac.v5i1.941

Keywords:

Alum, Rietveld method, X-ray powder diffraction, Anhydrous Alum, disordered structure.

Abstract

The sodium aluminium disulphate NaAl(SO4)2 has been obtained after calcinations at 300 °C of NaAl(SO4)2.12H2O alum. The structure of this compound has been refined from powder       X-ray diffraction data using the Rietveld method. This compound crystallises in trigonal system       P 3 2 1 with the following parameters: a = 4.749(12) Å, c = 8.314 (4) Å (Z = 1).  The final refinement led to RF = 6.3 %, RB = 4.12 %. In the proposed model the sulfate ions is in disorder between two nonequivalent crystallographic sites with probabilities p1/p2= 0.30/70. The atomic arrangement of NaAl(SO4)2 is characterised by two different alternating layers parallel to (001): the first layer is composed of corner-linked AlO6 octhahedra and SO4 tetrahedra, the second layer is built from monovalent Na+ . 

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Author Biography

Mohamed Boujelbene, Laboratory of the Physico-Chemistry of Solid States. LR11 ES51. of Sfax. Road of Soukra km 4. Sfax3071

Departement of chemistry

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Published

2009-04-29

How to Cite

Boujelbene, M., & Mhiri, T. (2009). ab initio X-ray structure determination of NaAl(SO4)2. JOURNAL OF ADVANCES IN CHEMISTRY, 5(1), 607–613. https://doi.org/10.24297/jac.v5i1.941

Issue

Vol. 5 No. 1 (2013)

Section

Articles

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