... ( Fig. 2b ). Enrichment in Ru takes the form of irregularly distributed clots ( Fig. 3b ). The Ru-dominant compositions correspond to ruthenium or rutheniridosmine; both are uncommon and typically occur as angular relics ( Figs. 4c , 5b ). Fig. 2. (a) A back-scattered electron image (BSE...

... of the systems cobalt ruthenium sulfide (Co 1– x Ru x S 2 ) and rhodium ruthenium sulfide (Rh 1 -x Ru x S 2 ) . Inorganic Chemistry , 22 , 61 – 63...

... for hydrogen species. The catalytic performance test confirmed that the bimetallic catalyst has significantly greater activity and stability. The optimal loadings are 5% copper and 1% ruthenium, and the performance of this catalyst is comparable to those of noble-metal Pt/M catalysts. * Email: liunw...

..., ruthenium and rhodium in komatiites: Evidence for iridium alloy saturation . Chemical Geology 257 , 44 – 58 . DOI: https://doi.org/10.1016/j.chemgeo.2008.08.015 Barnes, S.J. & Ripley E.M...

... , 38 , 312 – 326 . Harris D.C. and Cabri L.J. ( 1973 ) The nomenclature of the natural alloys of osmium, iridium and ruthenium based on new compositional data of alloys from world-wide occurrences . The Canadian Mineralogist , 12 , 104 – 112 . Harris D.C. and Cabri...

... directly with the melt phase or silicate minerals. Ruthenium also has a relatively low solubility in silicate melts. In addition, as the buffered f O 2 is relatively high, Fe loss into Pt capsules is not significant and ferric Fe is present in sufficient concentrations to be accurately measured...

..., from 0.10 to 0.30% (mass), by electron-microprobe analysis, are too elevated compared to ours and may be an artifact of the electron microprobe. The compositional differences are graphically shown in the multi-element plot of Figure 2 . Ruthenium, Rh, Os, and Ir are remarkably depleted, up to five...

... ) The Ni-S system and related minerals . Journal of Petrology , 3 , 126 – 175 . Laurenz , V. , Fonseca , R.O. , Ballhaus , C. , Jochum , K.P. , Heuser , A. , and Sylvester , P.J. ( 2013 ) The solubility of palladium and ruthenium in picritic melts: 2. The effect...

..., Krasnoyarskiy kray, and the second pertains to the Miass placer zone, Chelyabinsk oblast, in the southern Urals. The platinum-group element (PGE) mineralization in both cases is mostly (at least 80%) represented by alloy minerals in the system Ru–Os–Ir, in the order of occurrence osmium, ruthenium and iridium...

... temperature: Evidence from serpentinized and weathered chromitite of the Vourinos complex, Greece . Canadian Mineralogist , 35 , 611 – 626 . Harris , D.C. and Cabri , L.J. ( 1973 ) The nomenclature of the natural alloys of osmium, iridium, and ruthenium based on new compositional data...

...) and shows a chondrite-normalized PGE pattern with a slightly positive slope, with enrichment in Pt and Pd relative to Os and Ir. Ruthenium and Rh show positive and negative peaks, respectively. In agreement with the PGE distribution, the following platinum-group minerals (PGM) have been found: laurite ((Ru...

...% laurite grains), followed by Os- and Ir-dominant alloys (i.e., the minerals osmium and iridium, respectively); unnamed phases of ruthenium selenide [RuSe 2 ] and rhodium telluride [RhTe] are rare. Selenium-rich laurite, not reported previously, likely belongs to an inferred RuS 2 –RuSe 2 series. Native Ru...

.... Photo by O. Pour. – pyrite showed Pt, Re, Au and As concentrations up to 0.23 ppm, 0.42 ppm, 4.96 ppm and 18 400 ppm, respectively. Ruthenium, Rh, Pd and Ir were below minimum detection limit. Millerite showed all PGE, Re and Au values below minimum detection limit; – despite anomalous PGE...

... were deposited from a hydromagmatic fluid that had scavenged PGE from beneath the chromitite. laurite ruthenium PGE PGM Stillwater Complex layered mafic/ultramafic complex Bushveld Complex ophiolite chromitite Our examination of the chromitites from the Stillwater igneous complex...

... (Pt 2 FeNi), and tulameenite (Pt 2 FeCu). Equally, the term Os-Ir-Ru alloy is used for all members of this ternary system which contains the minerals osmium, iridium, ruthenium, and rutheniridosmium. The listing below approximately follows the relative frequency of the PGM with alloys first, followed...

... computed tomography and X-ray diffraction data, provided for the first time in this study, reveal that the Loma Peguera grains consist of a fine intergrown of ruthenium and magnetite not detectable at the scale of the electron microprobe. We believe that the investigated grains were originally laurite...

... bacterium, Magnetospirillum gryphiswaldense strain MSR-1 were grown in the presence of manganese, ruthenium, zinc and vanadium, of which only manganese was incorporated within the magnetosome magnetite crystals. We demonstrate that the magnetic properties of magnetite crystals of magnetotactic bacteria can...