 | Atencio, D., Roberts, A. C., Cooper, M. A., Filho, L. A. D. Menezes, Coutinho, J. M. V., Stirling, J. A. R., Venance, K. E., Ball, N. A., Moffatt, E., Chaves, M. L. S. C., Brandão, P. R. G., Romano, A. W. (2012) Carlosbarbosaite, ideally (UO2)2Nb2O6(OH)2·2H2O, a new hydrated uranyl niobate mineral with tunnels from Jaguaraçu, Minas Gerais, Brazil: description and crystal structure. Mineralogical Magazine, 76 (1) 75-90 doi:10.1180/minmag.2012.076.1.75 | Journal (article/letter/editorial) | | niobate mineral with tunnels from Jaguaraçu, Minas Gerais, Brazil: description and crystal structure D. ATENCIO1...Paulo, Rua do Lago, 562, 05508-080 São Paulo, SP, Brazil Geological Survey of Canada, 601 Booth Street,...Federal de Minas Gerais, Avenida Antônio Carlos, 6627, 31270-901 Belo Horizonte, Minas Gerais, Brazil Canadian...de Engenharia de Minas, Escola de Engenharia da Universidade Federal de Minas Gerais, Avenida Antônio...Carlos, 6627, 31270-901 Belo Horizonte, Minas Gerais, Brazil [Received 31 December 2010; Accepted 1 December |  | Belakovskiy, D., Welch, M. D., Camara, F., Gatta, G. D., Tait, K. T. (2012) New Mineral Names. American Mineralogist, 97 (8) 1523-1530 doi:10.2138/am.2012.596 | Journal (article/letter/editorial) | | and Alay Mt. Ranges (Tajikistan) in a zonal microcline-calcite vein with aegirine-hedenbergite, quartz...beginning of the 20th century from a granite pegmatite in a small pit near Åskagen quarry, mining village...niobate mineral with tunnels from Jaguaraçu, Minas Gerais, Brazil: description and crystal structure...hydrated uranyl niobate from the Jaguaraçu pegmatite, Minas Gerais, Brazil, where it is a late-stage cavity...high-potassium peralkaline pegmatite about 10 m long and up to 1 m thick. The pegmatite was (currently mined |  | | Journal (issue) | | 92kg); crystal 18km from Santa Barbara, Minas Gerais, Brazil Natural History Museum London Personal...limestones with graphite, serpentine and sporadic pegmatite complexes of synorogenic metasomatic or post-orogenic...alexandrite, cat's-eye and 102-8 chrysoberyl in Brazil. Journal of Gemmology, 23, 333-54 Epprecht, W....a n d the inferred s u l p h i d e s suggest pegmatite-like crystallization in an incompatible-element-enriched...occurs in feldspars of the triclinic system, thus microcline and the plagioclases show twinning but not sanidine |  | | Catalog/List | | IMPERIAL TOPAZ Ouro Preto, Iron Quadrangle, Minas Gerais, Brazil Only one area on the planet produces Imperial...commercial quantities: the Ouro Preto district in Brazil. Colors of the material produced range from pale... 53043 AQUAMARINE Guaratinga (Jaquetô), Bahia, Brazil Large and stout enough to qualify as a ‘blunt instrument’...workings south of the village of Paprok that explore pegmatite zones within the local Triassic slates. Thirty...of Feldspar, one is the blocky Baveno twinned Microcline that serves as the host for many glassy Tourmaline |  | | Book | | 42(H2O)0.18[Al2(Be2.35Li0.65)Si6O18] from Mokrusha pegmatite, Murzinka, Middle Urals (Yakubovich et al. 2009;...Mg-poor schorl from the Limoeiro mine, Murta, Minas Gerais, Brazil, the band of OH groups in the W site coordinated...phosphates: nahpoite Na2(HPO4) from peralkaline pegmatite of the Lovozero massif (a), newberyite Mg(HPO4)·3H2O...[nominally, Fe2+Mn2+2(PO4)2·3H2O] from Cigana mine, Brazil (a), landesite [nominally, Fe3+Mn2+2 (PO4)2(OH)·]...Al)4(B,Be)12O28 (Fig. 2.5) Locality: Sahutany pegmatite field, Madagascar. Description: Yellowish semitransparent |
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Jaguaraçu pegmatite, Jaguaraçu, Minas Gerais, Brazil