Natural and synthetic compounds with krošhnkite-type chains: Review and classification
- Autor(en)
- Michel Fleck, Uwe Kolitsch, Birgit Hertweck
- Abstrakt
The crystal structure of krošhnkite [Na2Cu(SO4)2 ž 2 H2O], which contains infinite chains composed of CuO6 octahedra comer-linked with SO4 tetrahedra, was originally determined 1952 by Dahlman. Since then, a large number of both minerals (e.g., collinsite, fairfieldite, etc.) and synthetic compounds with closely related structures have been investigated, but the structural relation was not always recognised. In the present review we compare the structures of AnM(XO4)2 ž 2 H2O (A = mono- or divalent cation, n = 1, 2; M = di- or trivalent cation; X = penta- or hexavalent cation) compounds with krošhn-kite-type infinite chains, and propose a structural classification into six types. The rod group symmetries of the chains are compared. Furthermore, the linkage of these chains to double chains (in krausite-type compounds) and sheets (in yavapaiite-, merwinite-, bafertisite-type and similar structures) is discussed, and the occurrence of octahedral-tetrahedral chains topologically identical to those in krošhnkite (referred to as krošhnkite-type) and similar chains (referred to as krošhnkite-like) in several related compounds is pointed out.
- Organisation(en)
- Institut für Mineralogie und Kristallographie, Institut für Romanistik
- Journal
- Zeitschrift für Kristallographie : international journal for structural, physical, and chemical aspects of crystalline materials
- Band
- 217
- Seiten
- 435-443
- Anzahl der Seiten
- 9
- ISSN
- 0044-2968
- Publikationsdatum
- 2002
- Peer-reviewed
- Ja
- ÖFOS 2012
- 1051 Geologie, Mineralogie
- Link zum Portal
- https://ucrisportal.univie.ac.at/de/publications/bd34eea0-badd-4518-8b49-fa06318b6380