 | 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 |  | | 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...Interestingly, these matte black rhombs have formed in a pegmatite environment, which is a fairly rare occurrence |  | | 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...(c/a = 0.451) indicate that it is a member of the schorl-dravite series (Dunn et al, 1975; Epprecht, 1953;...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 |  | | Book | | 42(H2O)0.18[Al2(Be2.35Li0.65)Si6O18] from Mokrusha pegmatite, Murzinka, Middle Urals (Yakubovich et al. 2009;...MgMgMg in the IR spectra of the members of the schorl-dravite solid-solution series), AlAlLi (3650–3690...Fe3+-bearing Mg-poor schorl from the Limoeiro mine, Murta, Minas Gerais, Brazil, the band of OH groups...(c) elbaite, (d) Ca-bearing elbaite, (e) Mn-rich schorl, and (f) dravite. The picture is drawn using data...tourmalines (solid solutions of elbaite, tsilaisite and schorl), the following assignment of O–H-stretching bands |
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