...Joseph Murdoch Abstract X -ray powder photographs of colusite, germanite and reniérite show them to be essentially isostructural. They are isometric or pseudo-isometric, some divergences from a truly isometric pattern being shown. Colusite and germanite are isotropic on the polished surface...

...Charles B. Sclar; B. H. Geier Abstract Textural relations observed in germanium-rich sulfide ore from the Tsumeb mine, South-West Africa, suggest that germanite was deposited at an early stage of the hypogene mineralization and that renierite, which is closely associated with the germanite...

..., chalcopyrite, sphalerite, bomite, tennantite, fluorite, geocronite, and possibly germanite. Renierite is of widespread occurrence in Cu-Zn-Pb ores throughout the world and is particularly characteristic of dolomite-hosted Cu-Zn-Pb sulfide deposits. Small grains of what appears to be bomite or “orange bomite...

... on a single specimen originating from the Tsumeb mine, Tsumeb, Namibia, as very fine-grained aggregates in vugs of massive renierite – germanite – tennantite ore. There are no other associated secondary phases. Individual subhedral to rarely euhedral crystals are platy to very thin prismatic, elongate [001...

... represents the world’s largest occurrence of Ge in sulfide minerals ( Melcher 2003 ). Within the orebody were pockets, some attaining several tens of tonnes, that contained high-grade ores of germanite [Cu 26 Fe 4 Ge 4 S 32 ] and renierite [(Cu,Zn) 11 (Ge,As) 2 Fe 4 S 16 ] ( Lombaard et al. 1986...

... absorption atom. These minerals include 209 Ge(II)-sulfides such as GeSe and GeS (Wyckoff 1963), as well as Ge(IV)-sulfides 210 such as germanite (Tettenhorst and Corbato 1984), renierite (Bernstein et al. 1989) 211 and GeS2 (Zachariasen 1936). The calculations were performed using FEFF10 212 software (Rehr...

...Clifford Frondel; Jun Ito Abstract The primary ores of the Cu-Pb-Zn deposit at Tsumeb contain germanium in solid solution in relatively large amounts in enargite, tennantite, renierite and germanite. Oxidation of the ores in a limestone environment has given rise to an extensive suite of secondary...

... to Strunz et al. (1958) , gallite occurs in association with germanite, renierite, sphalerite, galena, chalcopyrite, pyrite, bornite, and chalcocite. Phase equilibria of the Cu–S system have received much attention from mineralogists and economic geologists, so that this binary system is now well...

... with germanite and renierite ( Springer 1969b , Geier & Ottemann 1970 , Innes & Chaplin 1986 , Spiridonov 1987 , Spiridonov et al. 1992 ). Germanium- and tungsten-bearing colusite are present in trace quantities at the carbonate-hosted Khusib Springs deposit, Otavi Mountains, Namibia ( Melcher et...

... within this ore type but never in contact with omariniite. * E-mail: [email protected] 26 9 2016 26 10 2016 © 2017 The Mineralogical Society 2017 According to Höll et al. (2007) Cu-Fe-Zn-Ge-sulfides like germanite and renierite are characteristic for the carbonate...

... these deposits, Ge-rich zones are usually associated with high-grade copper ore ( Bernstein 1985 ). Germanium either occurs as an essential component of several sulfide minerals, particularly those with Cu ( e.g. , renierite, briartite and germanite), or it substitutes for As and Sn ( e.g. , Ge-bearing colusite...

... with bornite and chalcocite-digenite. Coarse (up to 1.1-cm diam) carrollite (Cu(Co,Ni) 2 S 4 ) is proposed to have formed from the breakdown of cobaltiferous pyrite ( Hitzman, 1986 ). Other minor phases include renierite ((Cu,Zn) 11 (Ge,As) 2 Fe 4 S 16 ) and germanite (Cu 11 Ge(Cu, Ge, Fe, Zn, W, Mo, As, V) 4...

... for renierite and kipushite and the joint-type locality (with Tsumeb, Namibia) for briartite and gallite ( Lhoest, 1995 ). Resampling of the large, historical collections of well-located ore and gangue minerals acquired by these researchers from various mine levels, forms the basis of this study. We focus...

... indicating an intermediate-sulfidation systems. Ge-bearing minerals (germanite, briartite, renierite, Ge-rich colusite) are also reported in several deposits from the Upper Cretaceous Panagyurishte district of Bulgaria (Radka, Chelopech, Krassen). These are considered as high- or intermediate-sulfidation...

... of abundance: galena, tennantite, sphalerite, chalcocite, enargite, and bornite together with lesser chalcopyrite, germanite, renierite, and pyrite ( Hayes 1984 ). Supergene chalcocite, djurleite, digenite, and covellite are important in an upper and a lower oxidation zone. The Cu-bearing hypogene sulfide...

...) and mindat.org, 37 naturally occurring Ge-bearing minerals have been identified and approved by the Commission of New Minerals, Nomenclature and Classification of the International Mineralogical Association (IMA-CNMNC). Among them, 18 are Ge-sulfide minerals, with argyrodite, briartite, renierite, and germanite...

... with higher activity of sulfur contain Ge in the form of its own sulfides, such as germanite, renierite, briartite or argyrodite ( Bernstein 1985 ). This is also the case at Capillitas, where Ge is present as distinct sulfides (putzite, catamarcaite, unnamed Cu 8 Fe 2 ZnGe 2 S 12 ). On the basis...

... of 4.105(40,011), 3.681(100,111), 3.121(60b,220,121), 2.921(100,211), 2.512(40,131), 2.403(90,320), 1.646(80,322) and 1.624(50,142). The mineral occurs with no other secondary associations in a vug (4 × 5 mm) on a single specimen (1.6 × 2.3 × 3.5 cm) of renierite-germanite-tennantite ore from...

... (PO 4 ) 2 (OH) 6 0 ≤ x ≤ 1, is a new supergene mineral from the Tsumeb deposit, Tsumeb, Namibia. It formed by alteration of Ge-Ga minerals in the second oxidized zone of a dolostone-hosted, polymetallic, hydrothermal ore. The mineral was found in millimeter-sized vugs in massive germanite-renierite...