Titre du document / Document title

Crystal chemistry of inorganic compounds based on chains of oxocentered tetrahedra. III. Crystal structure of georgbokiite, Cu₅O₂(SeO₃)₂Cl₂

Auteur(s) / Author(s)

KRIVOVICHEV S. V. ⁽¹⁾ ; SHUVALOV R. R. ⁽¹⁾ ; SEMENOVA T. F. ⁽¹⁾ ; FILATOV S. K. ⁽¹⁾ ;

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

⁽¹⁾ St Petersburg University, University Emb. 7/9, Department of Crystallography, 199034 St. Petersburg, RUSSIE, FEDERATION DE

Résumé / Abstract

The monoclinic crystal structure of georgbokiite. a new mineral with the chemical composition Cu₅O₂(SeO₃)₂Cl₂ (a 6.030(1) A), b = 13.744(3) A, c = 5.562(1) A. β = 95.75(1)°, V = 458.6(2) A³, Z = 2, P2₁/c) has been refined to an R index of 0.043 (wR = 0.108). The structure is similar to that previously determined for synthetic Cu₅Se₂O₈Cl₂. It is based on the unbranched zweier chains {uB. 1¹_x} [O₂Cu₅] running parallel to the c axis which are composed of [OCu₄] oxocentered copper tetrahedra linked through corners and edges in turn. The pyramidal (SeO₃) groups are in face-to-face' positions relative to the [OCu₄] tetrahedra and together with the oxocentered chains form the more complex chains {[O₂Cu₅](SeO₃)₂} lying side by side in the (010) plane. The chloride anions are located between the chains to link them into a three-dimensional framework. The main structural features of other inorganic compounds based on single chains of oxocentered condensed copper tetrahedra are discussed in comparison.

Revue / Journal Title

Zeitschrift für Kristallographie   ISSN 0044-2968   CODEN ZEKRDZ 

Source / Source

1999, vol. 214, n^o3, pp. 135-138 (14 ref.)

Langue / Language

Anglais
Revue : Allemand

Editeur / Publisher

Oldenbourg, München, ALLEMAGNE  (1921) (Revue)

Mots-clés anglais / English Keywords

crystal chemistry ; crystal structure ; crystal systems ; new minerals ; structural formula ; unit cell ; cell dimensions ; space groups ; coordination ; atomic packing ; fumaroles ; exhalative deposits ; volcanic deposits ; Kamchatka Russian Federation ; Tolbachik ; X-ray diffraction ; interatomic bond ; Russian Federation ; Eurasia ; Kamchatka Peninsula ; Russian Pacific region ;

Mots-clés français / French Keywords

Cristallochimie ; Structure cristalline ; Système cristallin ; Minéral nouveau ; Formule structurale ; Maille élémentaire ; Constante réticulaire ; Groupe espace ; Coordinence ; Empilement atome ; Fumerolle ; Gîte exhalatif ; Gîte volcanogène ; Kamchatka ; Volcan Tolbachik ; Diffraction RX ; Liaison interatomique ; Georgbokiite ; Russie ; Eurasie ; Péninsule Kamtchatka ; Région Pacifique Russe ;

Mots-clés espagnols / Spanish Keywords

Cristaloquímica ; Estructura cristalina ; Sistema cristalino ; Mineral nuevo ; Celdilla cristalina ; Constante reticular ; Grupo espacio ; Coordinancia ; Estructura átomo ; Fumarola ; Difracción RX ; Enlace interatómico ; Rusia ; Eurasia ;

Localisation / Location

INIST-CNRS, Cote INIST : 915, 35400007393235.0010