 | 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) | | “boron-mullite” is replacing the Fe-dominant analogue of werdingite in B-rich metapelites at Mount Stafford, central...solution containing up to 30% (Mg,Fe)2Al14B4Si4O37 (werdingite). Boralsilite in the Larsemann Hills is commonly...crystallization for precipitation of boralsilite, werdingite, and grandidierite instead of elbaite and B minerals...pegmatites. Keywords: Boralsilite, “boron-mullite,” werdingite, boron, pegmatite, Rietveld refinement, electron...boroaluminosilicate as a breakdown product of werdingite at Mount Stafford, central Australia (Buick et |  | | Journal (article/letter/editorial) | | solid solutions), prismatine, grandidierite, werdingite, boralsilite and dumortierite. Tourmaline can...dravite – foïtite), prismatine, grandidierite, werdingite, boralsilite et dumortierite. On se sert de la...Al)3Al6Si6O18(BO3)3(OH,O)3(OH,F), boralsilite (Al16B6Si2O37), werdingite [(Mg,Fe)2Al12(Al,Fe)2 Si4B2(B,Al)2O37], grandidierite...veinlet containing grandidierite, boralsilite and werdingite (Cempírek et al. 2010) suggests that these three...pegmatites studied, whereas prismatine, grandidierite, werdingite, and dumortierite are less abundant (Table 1); |  | 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) | | sillimanite or as narrow overgrowths around embayed werdingite prisms. In other samples boromullite and sillimanite...Sekaninaite-cordierite, potassium feldspar, biotite, werdingite and its Fe-dominant analogue, hercynite, and...lower SiO2 and B2 O3 contents than the assemblage werdingite + cordierite + sillimanite and thus a decrease...in SiO2 and B2 O3 leads to the replacement of werdingite by boromullite, consistent with textural relations...still less than boromullite in an atoll around werdingite (Fig. 7b, d). FeO and MgO contents do not vary |  | | Journal (article/letter/editorial) | | mineral from Cap Andrahomana, southwest of Fort Dauphin (Tolanaro) in southern Madagascar. Since then...B2 Al8 (Mg0.84 Fe0.16 )2 Al4 (Al0.79 Fe0.21 )2 Werdingite (B0.77 Al0.23 )2 O37 Si4 B2 (B0.77 Al0.23 )2...98 Fig. 15. Crystal structure projections of werdingite (Niven et al., 1991) approximately parallel c...synthesized the pure magnesium end member of werdingite at temperatures between 800 and 875 ◦ C and at...kbar. 5.8. MUL-XXXII.352, P1̄: Werdingite group 6. Conclusions Werdingite with ideal chemical composition |  | | Journal (article/letter/editorial) | | 0s1-Anlarklis (Grew el al. 1998a, Grew 2007), Cap Andrahomana, Madagaskar (Grew et al. 1998b) og Bory granulillmassivel...of grandidierite, ominelite, boralsilite, and werdingite from the Bory granulite massif, Czech Republic... C.K., WIEDENBECK, M. & ROUSE, R.C. (1998b): Werdingite, a borosilicate new to granitic pegmatites. Canadian...G., MEDENBACH, O. & HUIJSMANS, J.J.P. (2010): Werdingite from SW Norway: The role of iron in a borosilicate...G., MEDENBACH, O. & HUIJSMANS, J.J.P. (2011): Werdingite from a pegmatite at Almgjotheii, Rogaland, Norway: |  | | 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 |
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