Titre du document / Document title

Chlorartinite, a volcanic exhalation product also found in industrial magnesia screed

Auteur(s) / Author(s)

SUGIMOTO Kunihisa ⁽¹⁾ ; DINNEBIER Robert E. ⁽¹⁾ ; SCHLECHT Thomas ;

Affiliation(s) du ou des auteurs / Author(s) Affiliation(s)

⁽¹⁾ Max-Planck- Institute for Solid State Research, Heisenbergstrasse 1, 70569 Stuttgart, ALLEMAGNE

Résumé / Abstract

The volcanic exhalation product chlorartinite, [Mg₂(CO₃)(H₂O)(OH)]Cl·H₂O, has recently been found to be a minor, and in some samples a major, component of magnesia floors for industrial use. In order to be able to perform quantitative phase analysis using the Rietveld method, its crystal structure was determined from high-resolution synchrotron powder diffraction data by the global optimization technique of simulated annealing and Rietveld refinement. The final Rp and R_wp values are 5.23% and 6.56%, respectively. Chlorartinite crystallizes in the rhombohedral space group R3c (No. 161), with a = 23.14422 (16) Å, c = 7.22333 (5) Å, V = 3350.84 (5) ų, Z = 18. The building units of chlorartinite consist of MgO₆ octahedra forming 15-membered puckered rings which are interconnected by CO₃ triangular moieties. The rings are stacked to form a honeycomb-like three-dimensional framework structure with large isolated channels. Within the channels, free chlorine atoms and disordered water molecules are located.

Revue / Journal Title

Journal of applied crystallography   ISSN 0021-8898   CODEN JACGAR 

Source / Source

2006, vol. 39 (5), pp. 739-744 [6 page(s) (article)] (16 ref.)

Langue / Language

Anglais

Editeur / Publisher

Blackwell, Oxford, ROYAUME-UNI  (1968) (Revue)

Mots-clés anglais / English Keywords

Rietveld method ; Three dimensional structure ; Space groups ; Trigonal lattices ; Simulated annealing ; Powder pattern ; XRD ; Structure resolution ; Crystal structure ; Analysis method ; Phase analysis ; Quantitative chemical analysis ; Magnesia cement (floor covering) ; Magnesium compounds ; Magnesia ; Volcanic gases ;

Mots-clés français / French Keywords

Méthode Rietveld ; 6110N ; Structure 3 dimensions ; Groupe espace ; Réseau rhomboédrique ; Recuit simulé ; Diagramme poudre ; Diffraction RX ; Résolution structurale ; Structure cristalline ; Méthode analyse ; Analyse phase ; Analyse quantitative ; Sol magnésien revêtement ; Magnésium composé ; Magnésie ; Gaz volcanique ;

Mots-clés espagnols / Spanish Keywords

Estructura 3 dimensiones ; Diagrama polvo ; Resolución estructural ; Método análisis ; Análisis fase ; Revestimiento cemento magnesiano ; Magnesia ;

Localisation / Location

INIST-CNRS, Cote INIST : 13882, 35400014302203.0140