 | Grew, E. S., Graetsch, H. A., Poter, B., Yates, M. G., Buick, I., Bernhardt, H.-J., Schreyer, W., Werding, G., Carson, C. J., Clarke, G. L. (2008) Boralsilite, Al16B6Si2O37, and "boron-mullite:" Compositional variations and associated phases in experiment and nature. American Mineralogist, 93 (2) 283-299 doi:10.2138/am.2008.2571 | Journal (article/letter/editorial) | | grandidieritebearing lens in metapelitic migmatite and cordierite granofels in metamorphic zone 4 (granulite facies)...manuscript). All three specimens are dominated by cordierite, hercynite, and K-feldspar (Buick et al. 2006...are loose aggregates of subparallel prisms in cordierite. “Boron-mullite” is visible only in back-scattered...replacing; it is also commonly in contact with cordierite, and locally with hercynite, biotite, and K-feldspar...commonly contain the assemblage quartz + biotite + cordierite + K-feldspar ± orthopyroxene ± garnet, and high-Al |  | | Journal (article/letter/editorial) | | enrichments of prismatine and granular tourmaline with cordierite or feldspar, tourmaline–quartz metaquartzite...minerals occurring sparingly in the pegmatites are cordierite, biotite, sillimanite, andalusite and rutile...intergrowth, tourmaline (Tur), quartz (Qtz) and cordierite (Crd). Sample 112801D. C. Photomicrograph (plane-polarized...areas worldwide: Almgjotheii, Norway, Cap Andrahomana, Madagascar, and Horní Bory, Czech Republic (e.g...found with grandidierite and werdingite at Cap Andrahomana): low Ti and F contents and high Al content |  | Buick, Ian S., Grew, Edward S., Armbruster, Thomas, Medenbach, Olaf, Yates, Martin G., Bebout, Gray E., Clarke, Geoffrey L. (2008) Boromullite, Al9BSi2O19, a new mineral from granulite-facies metapelites, Mount Stafford, central Australia: a natural analogue of a synthetic "boron-mullite". European Journal of Mineralogy, 20 (5) 935-950 doi:10.1127/0935-1221/2008/0020-1809 | Journal (article/letter/editorial) | | fine scale (from < 1 μm to > 10 μm). Sekaninaite-cordierite, potassium feldspar, biotite, werdingite and...melt extraction. The assemblage boromullite + cordierite + sillimanite lies at lower SiO2 and B2 O3 contents...contents than the assemblage werdingite + cordierite + sillimanite and thus a decrease in SiO2 and B2...image. Abbreviations: Bmu – boromullite, Crd – cordierite, Hc – hercynite, Kfs – K-feldspar, Sil – sillimanite...(a) Photomicrograph of a boromullite atoll in cordierite matrix; a second aggregate consisting of boromullite |  | | Report (issue) | | The Natural History Museum of Milan and its Madagascar Collection The Museo Civico di Storia Naturale... the museum began paleontologic fieldwork in Madagascar (upper Permian fauna and Jurassic and Cretaceous...fieldwork in Madagascar in 1996 in collaboration with other institu tions in Madagascar, Italy, and the...Pezzotta has spent a total of twenty nine months in Madagascar making geological-mineralogical surveys. In collaboration...both classic and new minerals and gemstones from Madagascar opened at the Natural History Museum in Milan |  | | Journal (issue) | | Albite, 11.2 cm, from the La Marina mine, Muzo District, Boyaca Department, Colombia. See the article...Hodrusa-Hamre (in the Banska Stiavnica mining district) is also the type locality for hodrusite. V INTRODUCTION...historical events before 1920, we will use the older district name of Schemnitz in accordance with the literature...time, whereas for events after 1920 the modem district name of Banska Stiavnica will be used, bearing...to the same district. A list of the names of other sites in the Hanska Stiavnica district is given in |
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