 | | Journal (article/letter/editorial) | | MAY 1945 SIMPSONITE AND THE NORTHERN BRAZILIAN PEGMATITE REGION BY FREDERICK H. POUGH CONTENTS Page 505...and acknowledgments General description of the Alto do Giz Mineralogy Simpsonite Microlite Tantalite and...ILLUSTRATIONS Figure 1.—Typical tabular yellow-brown Alto do Giz simpsonite crystal 2.—Minute tabular, buff-colored...fragment from Onca Mine Plate 1.—Simpsonite 2.—Alto do Giz 3.—Kaolinite replacements 4.—Microlite and cyrtolite...ABSTRACT A study of the Alto do Giz, near Equador, Rio Grande do Norte, Brazil, reveals an interesting |  | | Report (issue) | | 505(2) Z=3 X-ray Powder Pattern: Alto do Giz pegmatite, Brazil; after removal of lines due to microlite...05 4.95 [5.5] [100.0] 100.00 (1) Alto do Giz pegmatite, Brazil; by electron microprobe, H2 O + F by...of microlite crystals, in a decomposed zoned pegmatite. Association: Microlite, simpsonite, tantalite...alumotantite, stibiotantalite, beryl, spodumene, petalite. Distribution: Name: In the Alto do Giz pegmatite, near...near Parelhas, Rio Grande do Norte, Brazil. From the Greek for near and its relation to bariomicrolite |  | Hawthorne, Frank C., Burke, Ernst A. J., Ercit, T. Scott, Grew, Edward S., Grice, Joel D., Jambor, John L., Puziewicz, Jacek, Roberts, Andrew C., Vanko, David A. (1988) New Mineral Names. American Mineralogist, 73 (1-2) 189-199 | Journal (article/letter/editorial) | | = [l00], Z A c = 15. The mineral occurs in a pegmatite with beryl and columbite at Kobokobo, Kiku, Zaire...280(70)(112,131).Three weak lines have ftkl valuesthat do not spacegroup/4 /mmm, a: 4.597(5),c: 11.034(8)A...oxide zone of the Mannarditet Cumobabi molybdenum pegmatite deposit southwest of CumJ.D. Scott, G.R. Peatfield...5)(4.1,6.3) mineral speciesfrom the Evans-Lou pegmatite,Quebec.Can. data are a: 2.26(l), e: 2.42(l). calculatedfrom...oxide-mineral assemblages of the Alto do Giz pegmatite,Rio Grande do Norte, Brazil. Associatedminerals include |  | | Book | | another oxide, "yttria", from minerals found in the pegmatite at Ytterby, Sweden. Both supposed oxides were...Swedish ehernist Ekeberg in the eourse of analyzing pegmatite minerals from Ytterby, Sweden and Kimito, Finland...minerals from the same loeality, the farnaus pegmatite at Ytterby, Swcden. This faet stresses the geoehemieal...themselves. Then, why and under which conditions do they fractionate? Understanding the fractionation...(with 3 Figures) . . 189 Characteristics of Pegmatite Deposits of Tantalum. P. Cerny (with 18 Figures) |  | | Book | | incompletely characterized hydromicas-these nebulous species do not form visible crystals and in themselves are never...Watson, Trimble and Cowgill, 1977). LATINAMERICA BRAZIL Jacupiranga mine, Sao Paulo. Among the crystallized...Remedios mine, although generally Taxco ilvaite crystals do not exceed 6 mm (Des Revieres and Beals, 20 l l )...Mcgaw, per'>onalcommunication, 2007). 4 ITALY Rio Marina area, Island of Elba, Tuscany. Elba (Latin:...just to the south of the Rio Marina iron mine. On the coast near Torre di Rio, near the clock tower for |  | | Book (edition) | | the simple expositions given in Practical Gemmology do not now cover the subject adequately and a new book...to crystallize around local centres. The first to do so are those that form at the highest temperatures...Very coarse pegmatite at least 8 m (26 ft) thick at Urubu, near Araçuai, Minas Gerais, Brazil. Fine pink...and elsewhere are famous for carrying gold, and pegmatite veins may contain minerals with rare elements...acid members of the volcanic province in southern Brazil and Uruguay, and the fire opals occurring in small |  | | Book (volume) | | and Peng Wenshi (1982). However, these publications do not contain any analytical data for reference samples...yegorovite Na4[Si2O4(OH)2]2·7H2O from the Palitra pegmatite, Lovozero massif, Kola peninsula hydrated proton)...synthetic analogue of hydroniumjarosite because they do not conform to R-3 m symmetry. In IR spectrum of...Locality: Ampanodiana North pegmatite, Tetezantsio-Andoabatokely Pegmatite Field, Andrembesoa Commune... Locality: Ministerskaya Yama Pit, Sarapulka pegmatite field (near Sarapulka village), Murzinka district |
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