 | | Report (issue) | | SERIES NIOBIUM AND TANTALUM by BJM Diehl , __,..\\ I II I ·\ •: ~··.\.\·(t'\ ,/ !;t Open File Report...SURVEY NAMIBIA 1990 Open File Report MRS 12 2 Abstract Niobium-tantalum mineralisation in Namibia occurs...by-products of Tin-mining operations in central Namibia (Uis, Nainais, De Rust). Prominent niobium-tantalum...pegmatites occur in the Tantalite Valley in southern Namibia and have been mined for a long time on a small...pegmatites 2.1.1.1 Witkop pegmatite 2.1.1.2 White City pegmatite 2.1.1.3 Homestead pegmatite 2.1.1.4 Lepidolite |  | Keller, Paul, Fontan, François, Roldan, Francisco Velasco, de Parseval, Philippe (2007) Joosteite, Mn2+(Mn3+, Fe3+)(PO4)O: a new phosphate mineral from the Helikon II Mine, Karibib, Namibia. Neues Jahrbuch für Mineralogie - Abhandlungen, 183 (2) 197-201 doi:10.1127/0077-7757/2007/0069 | Journal (article/letter/editorial) | | a new phosphate mineral from the Helikon II Mine, Karibib, Namibia Paul Keller, François Fontan, Francisco...found in the granitic rare element pegmatite Helikon II, Karibib, Namibia. The new mineral is the Mn3 + -analogue...new mineral honours Mrs. Charlotte Jooste, Karibib, Namibia. Key words: Joosteite, Mn2 + (Mn3 + , Fe3...staněkite, granitic pegmatites, Helikon II mine, Karibib, Namibia. Introduction During a research program...the dumps of the Helikon II pegmatite, Okongava-Ost farm (No. 72), Karibib, Namibia. It turns out that |  | Keller, Paul, Lissner, Falk, Schleid, Thomas (2007) The crystal structure of joosteite, (Mn2+,Mn3+,Fe3+)2[PO4]O, from the Helikon II Mine, Karibib (Namibia), and its relationship to staneěkite, (Fe3+,Mn2+,Fe2+,Mg)2[PO4]O. Neues Jahrbuch für Mineralogie - Abhandlungen, 184 (2) 225-230 doi:10.1127/0077-7757/2007/0095 | Journal (article/letter/editorial) | | (Mn2+,Mn3+,Fe3+)2[PO4]O, from the Helikon II Mine, Karibib (Namibia), and its relationship to staněkite...Fe3+)2[PO4]O, from the type locality Helikon II pegmatite, Karibib (Namibia), space group I2/a, a 11.888(2)...folded zigzag chains and β-Fe2[PO4]O-I or β-Fe2[PO4]O-II is likewise joined together by common vertices but...crystal structure, staněkite, polymorphism, pegmatite, Namibia. Introduction Joosteite was first described...from the granitic pegmatite Helikon II mine at Okongava-Ost farm, Karibib (Namibia) (Keller et al. 2007) |  | | Report (issue) | | 17(3)° Z = 8 X-ray Powder Pattern: Helikon II pegmatite, Karibib, Namibia. 2.819 (10), 3.077 (8), 3.209 (6)...32.14 32.12 35.74 . 100.00 (1) Helikon II pegmatite, Karibib, Namibia; by electron microprobe, corresponding...oxidized sicklerite in a granitic rare-element pegmatite. Association: Lithiophilite, sicklerite, eosphorite...oxides. Distribution: From the Helikon II pegmatite, Karibib, Namibia. Name: Honors Mrs. Charlotte Jooste...(1920-2009), Karibib, Namibia, for her support of pegmatite research in Central Namibia. Type Material: |  | | Book | | REPUBLIC OF NAMIBIA - MINISTRY OF MINES AND ENERGY GEOLOGICAL SURVEY THE MINERAL RESOURCES OF NAMIBIA FIRST...DIRECTORATE: GEOLOGICAL SURVEY Director: Dr Brian G Hoal II , MESSAGE FROM THE HONOURABLE MINISTER OF MINES...ENERGY Of the several hundred minerals present in Namibia, around sixty have been exploited. some, such as...base metals and industrial minerals have helped Namibia rank amongst the top five mining countries in Africa...terms of production and reserves. In this context, Namibia is a major producer of copper, lead, zinc, cadmium |  | | Journal (article/letter/editorial) | | 519(10) IMA No. 2005–010 Skorpion zinc deposit, Namibia Werner Krause Ca3Zn2(PO4)2CO3(OH)2•H2O New structure-type...032(29), 2.013(27) IMA No. 2005–013 Helikon II pegmatite, Karibib, Namibia Paul Keller (Mn2+,Mn3+,Fe3+)2(PO4)O...IMA No. 2005–024 Pirquitas mining district, Puna Region, Rinconada Department, Jujuy Province, Argentina...278, b 3.660, c 17.347 Å, b 91.416° 4.27(61), 3.426(72), 3.345(87), 3.122(78), 3.009(71), 2.966(94), 2.883(100)...366(76), 1.669(64), 1.614(56) IMA No. 2005–029 Pegmatite #61, Karnasurt, Lovozero, Kola Peninsula, Russia |  | | Journal (article/letter/editorial) | | (648 nm). A brownish gray tarnish is observed after 72 h in air. The chemical composition, obtained by WDS...found by V.D. Dusmatov in 1976 in an alkaline pegmatite at the massif Dara-i-Pioz, Tajikistan. Surkhobite...(Mn2+,Mn3+,Fe3+)2[PO4]O, from the Helikon II Mine, Karibib (Namibia), and its relationship to staněkite...15 mm3) from the type locality Helikon II pegmatite, Karibib, Namibia, was determined by single-crystal...fragment measuring 0.10 × 0.06 × 0.03 mm (Bruker Apex II diffractomter, 2K CCD detector, MoKα radiation), |
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