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Marshite–miersile solid solution and iodargyrite from Broken Hill, New South Wales, Australia

Published online by Cambridge University Press:  05 July 2018

P. W. Millsteed
P. W. Millsteed*
Affiliation:
Faculty of Applied Science University of Canberra, PO Box 1 Belconnen, A.C.T. 2616 Australia
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Abstract

Microprobe analysis of marshite and miersite from Broken Hill, Australia, demonstrate extensive solid solution between the end-members CuI and AgI, indicating the possibility of a complete solid-solution series. Unit-cell parameters increase from 6.054 Å for marshite to 6.504 Å for miersite, closely following Vegard's Law. The Cu content of iodargyrite is generally below the limit of detection, but one zoned crystal contained 0.28 wt.% Cu. Crystallization of either miersite or iodargyrite at Broken Hill appears to be dependent upon the local availability and ratio of copper, silver and iodine ions.

Keywords

marshitemeirsiteiodargyriteBroken Hillsolid solutioncoppersilver
Type
Research Article
Information
Mineralogical Magazine , Volume 62 , Issue 4 , August 1998 , pp. 471 - 475
Copyright
Copyright © The Mineralogical Society of Great Britain and Ireland 1998

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