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

JOURNAL OF ADVANCES IN CHEMISTRY

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Field Value
 
Title ab initio X-ray structure determination of NaAl(SO4)2
 
Creator Boujelbene, Mohamed
Mhiri, T.
 
Subject Alum; Rietveld method; X-ray powder diffraction; Anhydrous Alum ; disordered structure.
 
Description 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+ . 
 
Publisher CIRWORLD
 
Date 2009-04-29
 
Type info:eu-repo/semantics/article
info:eu-repo/semantics/publishedVersion
Peer-reviewed Article
 
Format application/pdf
 
Identifier http://cirworld.com/index.php/jac/article/view/941
 
Source JOURNAL OF ADVANCES IN CHEMISTRY; Vol 5 No 1; 607-613
2321-807X
 
Language eng
 
Relation http://cirworld.com/index.php/jac/article/view/941/920
 
Rights Copyright (c) 2016 JOURNAL OF ADVANCES IN CHEMISTRY
 

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