Jahnsite—whiteite solid solutions and associated minerals in the phosphate pegmatite at Hagendorf-Süd, Bavaria, Germany
- 1 December 2010
- journal article
- Published by Mineralogical Society in Mineralogical Magazine
- Vol. 74 (6), 969-978
- https://doi.org/10.1180/minmag.2010.074.6.969
Abstract
Secondary phosphate assemblages from the Hagendorf Süd granitic pegmatite, containing the new Mn-Al phosphate mineral, nordgauite, have been characterized using scanning electron microscopy and electron microprobe analysis. Nordgauite nodules enclose crystals of the jahnsite—whiteite group of minerals, showing pronounced compositional zoning, spanning the full range of Fe/Al ratios between jahnsite and whiteite. The whiteite-rich members are F-bearing, whereas the jahnsite-rich members contain no F. Associated minerals include sphalerite, apatite, parascholzite, zwieselite-triplite solid solutions and a kingsmountite-related mineral. The average compositions of whiteite and jahnsite from different zoned regions correspond to jahnsite-(CaMnMn), whiteite-(CaMnMn) and the previously undescribed whiteite-(CaMnFe) end-members. Mo-Kα CCD intensity data were collected on a twinned crystal of the (CaMnMn)-dominant whiteite and refined in P2/a to wRobs = 0.064 for 1015 observed reflections.Keywords
This publication has 7 references indexed in Scilit:
- Nordgauite, MnAl2(PO4)2(F,OH)2·5H2O, a new mineral from the Hagendorf-Süd pegmatite, Bavaria, Germany: description and crystal structureMineralogical Magazine, 2011
- The Fe-Mn phosphate aplite ‘Silbergrube’ near Waidhaus, Germany: epithermal phosphate mineralization in the Hagendorf-Pleystein pegmatite provinceMineralogical Magazine, 2008
- Jahnsite-(NaFeMg), a new mineral from the Tip Top mine, Custer County, South Dakota: Description and crystal structureAmerican Mineralogist: Journal of Earth and Planetary Materials, 2008
- Phosphate mineral associations in the Cañada pegmatite (Salamanca, Spain) : Paragenetic relationships, chemical compositions, and implications for pegmatite evolutionAmerican Mineralogist: Journal of Earth and Planetary Materials, 2004
- Mineral replacement reactions: from macroscopic observations to microscopic mechanismsMineralogical Magazine, 2002
- WinGXsuite for small-molecule single-crystal crystallographyJournal of Applied Crystallography, 1999
- I. Whiteite, a new species, and a proposed nomenclature for the jahnsite-whiteite complex series. II. New data on xanthoxenite. III. Salmonsite discreditedMineralogical Magazine, 1978