...Windeati Argapadmi; Eniko R. Toth; Manuela A. Fehr; Maria Schönbächler; Christoph A. Heinrich AbstractSilver isotopes are a potential tracer for understanding the geochemical enrichment of gold, which is monoisotopic but occurs in metallic form with silver as a stable alloy component. This study...

... and Ireland weishanite crystal structure gold silver mercury gold–silver alloys amalgam nomenclature rules Weishanite , an alloy of Au, Ag and Hg, was originally described from a silicified zone in the silver-rich part of a gold–silver orebody in the biotite granulite of the Poshan mining district...

..., with the exception of one Au position which links five Te atoms and closes its coordination sphere with a contact with itself. Crystal-chemical features of the Au and Te atoms are discussed in relation to other gold and silver tellurides. Electron microprobe analyses of the crystal used for the structural study led...

... of Pb in the coatings in Rouyn Noranda reflect higher proportions of Zn- and Pb-bearing minerals in the ore in Rouyn Noranda (predominantly Au-Cu-Ag-Zn-Pb-rich ore hosted as chalcopyrite, pyrrhotite, sphalerite, galena, native gold, and silver), whereas Ni-bearing particulate matter and higher...

...) R 1 5.25 4.5 – 3.49 5.00 Z 1 1 3 1 1 Reference a 1 2 3 4 4 a 1 – this study; 2 – Orlandi et al . (2012); 3 – Orlandi et al . (2017); 4 – Topa & Makovicky (2016) . The silver substitution appears at the same site in écrinsite (Ag10 in Fig. 8 ) and type...

... , C. , Corazza , M. and Mazzetti , G. ( 1996 ) Reinvestigation of natural silver antimonides . European Journal of Mineralogy , 8 , 1347 – 1350 . Deschênes , G. , Xia , C. , Fulton , M. , Cabri , L.J. and Price , J. ( 2007 ) Leaching of a refractory gold ore...

... Mining Ltd. data, the mean gold concentration is 14 g/t together with 8 g/t silver. There is no available information about the palladium and platinum content in the mine. The Cavalcante region lies on the basement rocks of the Brasília Fold Belt (Neoproterozoic): the Paleoproterozoic graphite-bearing...

... to within ±3°C. A charge of ∼200 mg was carefully weighed out from the native elements. We used, as starting chemicals silver powder (Aldrich Chem. Co., 99.999% purity), lead ingot (Aldrich Chem. Co., 99.999% purity) and palladium powder (Aldrich Chem. Co., 99.95% purity). The starting mixture was first...

... microvolumes of a late-stage fluid rich in noble metals and metalloids at a postmagmatic-hydrothermal stage of crystallization. A compositionally diverse assemblage of ore minerals is recognized, which includes PGM and Au-bearing silver (Ag 78.8 Au 16.8 Cu 4.3 ). In general, the enrichment in Te, Bi and Pb...

..., with the simultaneous occurrence of copper, silver, and mercury as essential components. Indeed, balkanite is the only well-characterized mineral in the ternary system Ag 2 S–Cu 2 S–HgS. In order to achieve a better knowledge of this system, a more accurate characterization of danielsite, ideally (Cu,Ag) 14 HgS 8...

... , A. and Graeser , S. ( 1994 ) Polytypism in baumhauerite . American Mineralogist , 79 , 302 – 307 . Pring , A. , Birch , W.D. , Sewell , D. , Graeser , S. , Edenharter , A. and Criddle , A. ( 1990 ) Baumhauerite-2 a : A silver-bearing mineral with a baumhauerite-like supercell...

... of a Ni-Sb melt at 600 °C additional factors need to be considered. Silver is known to depress melting temperatures in sulfide systems ( Mavrogenes et al. 2001 ) and from the occurrence of Ag-bearing phases in association with breithauptite it is apparent that Ag could have stabilized the Ni-Sb-Ag melt...

...Luca Bindi; Christopher J. Stanley; Yurii V. Seryotkin; Vladimir V. Bakakin; Galina A. Pal'yanova; Konstantin A. Kokh AbstractThe crystal structure of the mineral uytenbogaardtite, a rare silver-gold sulfide, was solved using intensity data collected for a crystal from the type locality...

... and roshchinite confirms its independence as a mineral species. The structure of oscarkempffite contains five distinct coordination polyhedra of cations and seven of anions. It contains a mixed (Pb,Bi) site with a trigonal prismatic coordination, a silver site with a distorted tetrahedral coordination...

... parameter. It raises a question whether there exists a pure phase with only silver-substituted N  = 4 slabs. Structurally, it might face a size misfit between the N  = 3 and N  = 4 slabs, which is adjusted easily when every second N  = 4 slab is Pb rich. The perfection of intra-cell separation...

... of early zeolite, middle prehnite-pumpellyite, and late zeolite facies. The Rb-Sr age (apophyllite, calcite, metabasalts) of metamorphism varies from 232 Ma (onset) to 122 Ma (completion). The metamorphosed ores contain remobilized metamorphic-hydrothermal silver mineralization (Au-free silver, Hg-rich...

... of samples from Millport, Isle of Cumbrae, Firth of Clyde, show particles of native gold up to 10 µm size, typically with less than 15 wt% silver. Their context indicates that the gold was concentrated during diagenesis, in rocks that had not experienced regional temperatures above 100°C. These occurrences...

... as electrum and gold-silver telluride inclusions. Additionally, polymetallic veins (mainly containing sphalerite and galena) occur in the sedimentary rocks and the felsic volcanic rocks. They are not common and are considered to have formed later than the Au mineralization. Geologic data from the logs of 130...

...), represented by the member of the routhierite isotypic series stalderite. ralphcannonite new mineral species sulfosalt thallium zinc silver arsenic crystal structure Lengenbach Binn Valley Switzerland A mong the world-class localities for the study of sulfosalt assemblages, Lengenbach occupies...