...A. D. Westland; F. E. Beamish Abstract Some of the difficulties associated with the chemical separation and determination of the constituents of iridosmines are discussed and the methods of dissolution are reviewed. Applications of these procedures to the analysis of iridosmines from various world...

...R. J. Ford Abstract Platinum-group minerals in Tasmania occur mostly in placer deposits and are composed mainly of iridosmine and rutheniridosmine. Platinum-rich alloys are rare. Silicate inclusions in the metals include olivine (Fo (sub 94-89) ), enstatite, and nonstoichiometric pyroxene rich...

...C. E. Feather Abstract Approximately 80 percent of the platinum-group mineral grains in the Precambrian Witwatersrand conglomerate reefs are (Ir, Os, Ru) alloys. Osmium, iridosmine, osmiridium, and iridium are most abundant; rutheniridosmine, ruthenosmiridium, and ruthenian iridium are less...

... as iridosmine and osmiridium; (2) inclusions in native alloys and sperrylite may provide information on the mineralogy of primary deposits--michenerite and hollingworthite in Urals placers are a case in point; and (3) alteration of platinum-group element alloys in placers is a widespread process which takes...

...Donald C. Harris; Louis J. Cabri Abstract Osmiridium and iridosmine for binary alloys, rutheniridosmine and ruthenosmiridium for ternary alloys; Papua, New Guinea, Colombia, Canada © 1973 Mineralogical Association of Canada 1973 ...

...Kenneth G. Snetsinger Abstract The nugget was found in stream gravels of the South Fork of the Trinity River. Laths of anisotropic ruthenium-rich iridosmine make up 80 volume percent of it; the rest is iron-rich platinum. This assemblage is probably not primary in the sense of having crystallized...

... of lead contrasts with native platinum and iridosmine where iron is generally the principal base metal constituent and is associated with a large solid solubility of Pb in Pd but a small solubility in Pt. © 1961 Mineralogical Association of Canada 1961 ...

... their environment of formation. We discuss our results in light of the various models proposed for the formation of the Os-rich PGE alloys and recent models for formation of podiform chromite. The samples studied here are millimeter-sized iridosmine and osmiridium grains collected from the black sand placer...

... significant amounts of Ir (up to 31.1% by weight) and Pt (up to 11.7% by weight). Within the ore, osmium minerals are represented by iridosmine and platiniferous iridosmine. Besides native osmium, aggregates of iridium (up to 31.1% by weight) and platinum (up to 11.7% by weight) occur in association...

... structures in Southern Mongolia within the fracture zone, adjacent to the Ulahid ultrabasic massif. The PGE minerals of the Os–Ru–Jr system were found in the latter: rutheniridosmine, iridosmine, and osmiride, as well as awaruite and silver [ 10 ]. The Harat-Ula and Ulahid Massifs are divided by a 7-km wide...

.... Tagilsk, Russie. Coll. Dufrénoy, 1865. Orig.: Dr. Krantz.”.The sample is composed of a fine powder. Abbreviated as MNHN in this work. Label: #6774. “Iridosmine, Variété: Irite. Taguilsk, Oural, URSS”. An old printed label by “Dr Krantz-Berlin” is identical to the one from Vienna. Register...

... with cubic iridian taenite and Os-rich hexaferrum. The authors also reported that hexaferrum (presumably all three variants) is associated with “….. iridosmine (sic), rutheniridosmine, osmiridium (sic), laurite, and, occasionally, tulameenite, and solid solutions of the composition (Fe, Rh, Ir) and (Ni, Fe...

... concentrations in Pt-Fe alloys vary from to 0 to 1.7 wt. % ; grains with low Pd content are predominant. In the placers of the Kaura River, Pt(Fe) grains contain abundant inclusions of native Os and iridosmine. In this case, the Ir content in platinum increases to 6–7 wt. % and Os to 2.7 wt. % . In general...

... , 1985 ), form equidimensional inclusions and veinlet-like grains of isoferroplatinum and a thin rim around them. Individual rounded grains, up to 0.3 mm in size, and polymineralic intergrowths with iridosmine, erlichmanite, laurite and, in some cases, with sperrylite, bismutharsenide, irarsite...

... composition ( e.g., osmium, ruthenium, ruthen-iridosmine, Pt–Ir–Os, Ru–Ir–Pt, Ru–Pt and Pt–Fe alloys) was found to range from 0.10987 to 0.1095 ( Table 5 ). Since the concentration of Re in all samples is less than detection limit by EMPA (0.05 wt.%), the isotopic effect resulting from radioactive decay...

... known as osmiridium, iridosmine, etc.; Harris and Cabri 1973 ; for present nomenclature, see Harris and Cabri 1991 ). The composition data for natural alloys and experimental phase diagrams of PGE binaries suggest wide miscibility gaps in complex PGE systems (see Harris and Cabri 1991 and references...

... ]. This feature is typomorphic for the type in general, in contrast to ophiolite-related Os-Ir-Ru alloys which form the Ru trend. The Pt concentration in these alloys exceeds Ru concentration, reaching 3.31 wt. % . Rhodium is also always present in iridosmine, amounting to 0.5 % . In addition to the above...

... of Koryak Highland . Mineral. Zh . 9 ( 4 ), 71 – 82 (in Russ.). Rudashevsky , N.S. , Mochalov , A.G. , Budko , I.A. & Shumskaya , N.I. ( 1988 ): Pt–Ir-bearing and Ir–Pt-bearing taenite and Fe-bearing iridosmine – new mineral species . Mineral. Zh . 10 ( 1 ), 15 – 22...

... in most detail. The placers are dominated by isoferroplatinum; tetraferroplatinum and ferroplatinum are in subordinate amounts; of considerably rarer occurrence are tulameenite, hongshiite, iridosmine, native osmium, ruthenosmiridium, platiniridium, ruthenoplatosmiridium, rutheniridosmine, irarsite...