Titre du document / Document title

The crystal structure of christelite Zn₃Cu₂ (SO₄)₂ (OH)₆ . 4 H₂O

Auteur(s) / Author(s)

ADIWIDJAJA G. ⁽¹⁾ ; FRIESE K. ⁽¹⁾ ; KLASKA K.-H. ⁽¹⁾ ; SCHLÜTER J. ⁽¹⁾ ;

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

⁽¹⁾ Universität Hamburg, Mineralogisch-Petrographisches Institut, Grindelallee 48, 20146 Hamburg, ALLEMAGNE

Résumé / Abstract

The crystal structure of christelite Zn₃Cu₂(SO₄)₂(OH)₆. 4H₂O (space group P1; lattice parameters a = 5.4143(8) Å, b = 6.336(1) Å, c = 10.470(3) Å, α = 94.32(3)°, β = 90.06(2)°, γ = 90.27(2)°) was solved using direct methods and difference Fourier-syntheses. The structure was refined to a final R(F)-value of 0.033. The structure contains distorted [(Zn, Cu)O₆] octahedra which are connected as to form sheets of composition ∞²[(Cu,Zn)₂(OH)₃O]^-. These sheets are similar to those observed in the mineral ktenasite. In both structures sulphate groups are attached to the sheets of octahedra through common vertices. In christelite the tetrahedral [SO₄] groups are linked to isolated [Zn(H₂O)₄O₂] octahedra thus forming a three-dimensional structure, whereas in the structure of ktenasite the [SO₄] tetrahedra are bonded to isolated [Zn(H₂O)₆] by a system of hydrogen bonds. The relationship of christelite with other minerals is pointed out and discussed.

Revue / Journal Title

Zeitschrift für Kristallographie   ISSN 0044-2968   CODEN ZEKRDZ 

Source / Source

1996, vol. 211, n^o8, pp. 518-521 (14 ref.)

Langue / Language

Anglais
Revue : Allemand

Editeur / Publisher

Oldenbourg, München, ALLEMAGNE  (1921) (Revue)

Mots-clés anglais / English Keywords

Experimental study ; XRD ; Crystal structure ; Minerals ; Layered crystals ; Zinc sulfates ; Copper sulfates ; Copper hydroxides ; Zinc hydroxides ; Hydrates ; Hydroxides sulfates ; Multi-element compounds ; Hydrogen bonds ; Inorganic compounds ;

Mots-clés français / French Keywords

Etude expérimentale ; XRD ; Structure cristalline ; Minéral ; Cristal lamellaire ; Zinc sulfate ; Cuivre sulfate ; Cuivre hydroxyde ; Zinc hydroxyde ; Hydrate ; Hydroxysulfate ; Composé n éléments ; Liaison hydrogène ; Christelite ; Zn3Cu2(SO4)2(OH)6 ; Cu H O S Zn ; Composé minéral ;

Mots-clés espagnols / Spanish Keywords

Hidroxisulfato ;

Localisation / Location

INIST-CNRS, Cote INIST : 915, 35400006071436.0020