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Ganophyllite from Franklin, New Jersey; Pajsberg, Sweden; and Wales new chemical data

Published online by Cambridge University Press:  05 July 2018

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
Joseph E. Nelen
Affiliation:
Department of Mineral Sciences, Smithsonian Institution, Washington, DC 20560, USA
Robert A. Ramik
Affiliation:
Royal Ontario Museum, 100 Queen's Park, Toronto, Ontario, Canada

Abstract

Ganophyllite from Franklin, New Jersey, Pajsberg, Sweden, and the Benallt Mine, Wales, has been chemically reinvestigated. Twelve new analyses confirm the general structure of Kato (1980) and yield the tentative formula (K,Na,Ca)2Mn8(Si,Al)12(O,OH)32(OH)4·8H2O. There is little solid solution among octahedral cations, and the Si:Al ratio is nearly constant at 10:2. Ca and (Na + K) are apparently differentiated, but all examined ganophyllites are K-rich. Much of the water content is loosely bound and the upper limit of water content is not well defined. Ganophyllite is relatively invariant in chemical composition from locality to locality.

Type
Research Article
Copyright
Copyright © The Mineralogical Society of Great Britain and Ireland 1983

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References

Dunn, P. J., Leavens, P. B., Norberg, J. A., and Ramik, R. A. (1981) Am. Mineral. 66, 1063–7.Google Scholar
Peacor, D. R., and Leavens, P. B. (1983) Ibid, (in press).Google Scholar
Eggleton, R. A. (1972) Mineral. Mag. 38, 693711.CrossRefGoogle Scholar
Foshag, W. F. (1936) Am. Mineral. 21, 63–7.Google Scholar
Hamberg, A. (1890) Geol. Foren Forhandl. 12, 586–98.Google Scholar
Jefferson, D. A. (1978) Ada Crystallogr. A34, 491–7.CrossRefGoogle Scholar
Kato, T. (1980) Mineral. J. 10, 1-13.CrossRefGoogle Scholar
Larsen, E. S., and Shannon, E. V. (1922) Am. Mineral. 7, 149–52.Google Scholar
Larsen, E. S., (1924) Ibid. 9, 238–40.Google Scholar
Palache, C. (1910) Am. J. Sci. 29, 177–87.CrossRefGoogle Scholar
Peacor, D. R., Dunn, P. J., and Simmons, W. B. Mineral. Mag. (in press).Google Scholar
Smith, W. C. and Bannister, F. A. (1948) Ibid. 28, 343–51.Google Scholar
Smith, M. L., and Frondel, C. (1968) Ibid. 36, 893913.Google Scholar
Threadgold, I. (1979) Seminar on Broken Hill. Min. Soc. New South Wales & Min. Soc. Victoria, Australia.Google Scholar