Titre du document / Document title

Taikanite, BaSr₂Mn³⁺₂O₂[Si₄O₁₂], from the Wessels mine, South Africa: a chain silicate related to synthetic Ca₃Mn³⁺₂O₂[Si₄O₁₂)

Auteur(s) / Author(s)

ARMBRUSTER T. ⁽¹⁾ ; OBERHÄNSLI R. ; KUNZ M. ;

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

⁽¹⁾ Univ. Bern, Lab. chemische mineralogische Kristallographie, 3012 Bern, SUISSE

Résumé / Abstract

The crystal structure of the title compound has been determined (space group C2, a=14.600, b=7.759, c=5.142Å, β=93.25°, Z=2) and refined to R=8% for 800 reflections. The structure is characterized by vierer single chains [Si₄O₁₂] parallel to [010], which link edge-sharing zigzag chains of MnO₆ octahedra running parallel to [001]. Open channels in the structure are plugged by eightfold-coordinated Ba and Sr. The structure is related to that of synthetic Ca₃Mn³⁺₂O₂[Si₄O₁₂], which has the vierer single chain [Si₄O₁₂] in common

Revue / Journal Title

The American mineralogist   ISSN 0003-004X   CODEN AMMIAY 

Source / Source

1993, vol. 78, n^o9-10, pp. 1088-1095 (30 ref.)

Langue / Language

Anglais

Editeur / Publisher

Mineralogical Society of America, Washington, DC, ETATS-UNIS  (1916) (Revue)

Mots-clés anglais / English Keywords

Experimental study ; XRD ; Crystal structure ; Minerals ; Barium compounds ; Strontium compounds ; Manganese compounds ; Oxides ; Silicates ; Multi-element compounds ; Inorganic compounds ; Transition element compounds ;

Mots-clés français / French Keywords

Etude expérimentale ; XRD ; Structure cristalline ; Minéral ; Baryum composé ; Strontium composé ; Manganèse composé ; Oxyde ; Silicate ; Composé n éléments ; Taikanite ; Composé minéral ; Métal transition composé ;

Localisation / Location

INIST-CNRS, Cote INIST : 503, 35400004853504.0210