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Ganomalite from Franklin, New Jersey, and Jakobsberg, Sweden: new chemical and crystallographic data

Published online by Cambridge University Press:  05 July 2018

Pete J. Dunn ,
Donald R. Peacor ,
John W. Valley  and
Charles A. Randall
Pete J. Dunn
Affiliation:
Department of Mineral Sciences, Smithsonian Institution, Washington, DC 20560, USA
Donald R. Peacor
Affiliation:
Department of Geological Sciences, University of Michigan, Ann Arbor, Michigan 48109, USA
John W. Valley
Affiliation:
Department of Geological Sciences, University of Michigan, Ann Arbor, Michigan 48109, USA
Charles A. Randall
Affiliation:
Department of Geological Sciences, University of Michigan, Ann Arbor, Michigan 48109, USA
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Abstract

Chemical analyses for ganomalite from Franklin, New Jersey, and Jakobsberg, Nordmark, Sweden, imply that Mn is an essential element and that the formula is Pb9Ca5MnSi9O33, with Z = 1 for the hexagonal unit cell. Preliminary crystal structure data confirm that Mn and Ca are ordered, as implied by the chemical analyses. Ganomalite is hexagonal, space group P3, with a = 9.82 and c = 10.13 Å. Occurrences of samples from both localities are described, together with analytical data for macedonite from Jakobsberg.

Keywords

ganomaliteFranklinNew JerseyUSAJakobsbergSweden
Type
Research Article
Information
Mineralogical Magazine , Volume 49 , Issue 353 , September 1985 , pp. 579 - 582
Copyright
Copyright © The Mineralogical Society of Great Britain and Ireland 1985

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Footnotes

*

Present address: Department of Geology and Geophysics, University of Wisconsin, Madison, Wisconsin 53706.

†

Present address: Thomas Road, Rindge, New Hampshire 03461.

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