Zippeite from Cap Garonne, France: an example of reticular twinning
Author:
Plášil Jakub1, Petříček Václav1, Mills Stuart J.2, Favreau Georges3, Galea-Clolus Valérie4
Affiliation:
1. Institute of Physics of the Czech Academy of Sciences , Na Slovance 2 , 182 21 Praha 8 , Czech Republic 2. Geosciences, Museums Victoria , GPO Box 666 , Melbourne, Victoria 3001 , Australia 3. 421 Avenue Jean Monnet , Aix-en-Provence 13090 , France 4. 10 rue Combe Noire , Sollies-Toucas 83210 , France
Abstract
Abstract
We describe here the case of twinning by reticular (pseudo)merohedry in case of natural zippeite crystal from Cap Garonne, France. The twin is by two-fold rotation in [100] and it is a first document of this type of twinning in zippeite-related minerals and compounds. Zippeite crystals from Cap Garonne mine, France, were studied by single-crystal X-ray diffraction [a=8.7243(4), b=13.9337(7), c=8.8741(4) Å, β=104.243(5) and V=1045.59(9) Å3, Z=2, in C2/m]; refinement taking into account of the twinning resulted in R=2.81% for 1596 reflections with [I>3σ(I)] and refined twin fraction 0.7773(9):0.2227(9).
Publisher
Walter de Gruyter GmbH
Subject
Inorganic Chemistry,Condensed Matter Physics,General Materials Science
Reference18 articles.
1. R. J. Finch, T. Murakami, Systematics and paragenesis of uranium minerals. In Uranium: Mineralogy, Geochemistry and the Environment, (Eds. P. C. Burns, R. J. Finch) Reviews in Mineralogy and Geochemistry, Vol. 38, Mineralogical Society of America and Geochemical Society, Washington, DC, p. 91, 1999. 2. S. V. Krivovichev, J. Plášil, Mineralogy and crystallography of uranium. In Uranium, from Cradle to Grave, (Eds. P. C. Burns, G. E. Sigmon) Mineralogical Association of Canada Short Course, Vol. 43, Mineralogical Society of Canada, Winnipeg, MB, p. 15, 2013. 3. J. Plášil, J. Geosci.2014, 59, 99. 4. C. Frondel, J. Ito, R. M. Honea, M. A. Weeks, Can. Mineral.1976, 14, 429. 5. P. C. Burns, K. M. Deely, L. A. Hayden, Can. Mineral.2003, 41, 687.
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