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New data on the relation between caryinite and arseniopleite

Published online by Cambridge University Press:  05 July 2018

Pete J. Dunn
Affiliation:
Department of Mineral Sciences, Smithsonian Institution, Washington, D.C. 20560, USA
Donald R. Peacor
Affiliation:
Department of Geological Sciences, University of Michigan, Ann Arbor, Michigan 48109, USA

Abstract

Caryinite from Låmgban, Sweden, and arseniopleite from both the Långban and Sjö Mines in Sweden, are re-examined chemically and crystallographically. Both species are monoclinic, with space group C2/c, and similar lattice parameters. The general formula for caryinite is Na4Ca4Ca4(Mn,Mg)8(AsO4)12, and that for arseniopleite is Na4Ca4Mn4(Mn,Mg)8(AsO4)12. The species status of arseniopleite remains uncertain; it may have Mn dominant in the M(1) site.

Type
Mineralogy
Copyright
Copyright © The Mineralogical Society of Great Britain and Ireland 1987

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