Titre du document / Document title

Crystal structure of revdite Na₁₆ŔsI₄O₆(OH)₅]₂[Si₈O₁₅(OH)₆](OH)₁₀.28H₂O

Auteur(s) / Author(s)

RASTSVETAEVA R. K. ; MIKHEEVA M. G. ; YAMNOVA N. A. ; PUSHCHAROVSKII D. YU. ; KHOMYAKOV A. P. ; KIRSCH S. G. (Traducteur) ;

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

Russian acad. sci., inst. crystallography, RUSSIE, FEDERATION DE

Résumé / Abstract

The authors have determined the crystal structure of revdite (Enraf-Nonius autodiffractometer, MoKα radiation, 1785 reflections). The parameters of the monoclinic unit cell are: a = 53.83(4), b = 9.972(9), c = 6.907(4) Å, β = 96.78(1)°, space group C2. All the calculations were made by means of the AREN program system. Refinement of the model in the anisotropic approximation led to R_hkl = 0.084. In the structure of revdite we distinguish two types of silicon-oxygen bands, not joined together. The first type consists of bands [Si₄O₆(OH)₅], geometrically close to the bands of the synthetic crystals Li₂Mg₂[Si₄O₁₁] and comparable to the bands of vlasovite. The second type of silicon-oxygen bands are a combination of two bands of the first type, displaced relative to one another

Revue / Journal Title

Soviet physics. Crystallography   ISSN 0038-5638   CODEN SPHCA6 

Source / Source

1992, vol. 37, n^o5, pp. 632-636 (10 ref.)

Langue / Language

Anglais

Editeur / Publisher

American Institute of Physics, New York, NY, ETATS-UNIS  (1956-1992) (Revue)

Mots-clés anglais / English Keywords

crystal structure ; X-ray diffraction analysis ; unit cell ; cell dimensions ; symmetry ; space groups ; bonding ; atomic packing ; silicates ; crystal form ; color ;

Mots-clés français / French Keywords

Structure cristalline ; Diffraction RX ; Maille élémentaire ; Constante réticulaire ; Symétrie ; Groupe espace ; Liaison interatomique ; Empilement atome ; Silicate ; Formule structurale ; Revdite ; Forme cristalline ; Couleur ;

Mots-clés espagnols / Spanish Keywords

Estructura cristalina ; Difracción RX ; Celdilla cristalina ; Constante reticular ; Simetría ; Grupo espacio ; Enlace interatómico ; Estructura átomo ; Silicato ; Forma cristalina ; Color ;

Localisation / Location

INIST-CNRS, Cote INIST : 1182, 35400003288199.0110