iridosmine

iridosmine
/ir'i doz"min, -dos"-, uy'ri-/, n.
a native alloy of iridium and osmium, usually containing some rhodium, ruthenium, platinum, etc., used esp. for the points of gold pens.
Also, iridosmium /ir'i doz"mee euhm, -dos"-, uy'ri-/. Also called osmiridium.
[1820-30; IRID- + OSM(IUM) + -INE2]

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also called  Osmiridium,  

      mineral consisting of an alloy of iridium and a smaller proportion of osmium. It occurs in gold-bearing conglomerates, as at the Witwatersrand in South Africa, and in gold sands, as in California and Oregon, U.S. Because of their hardness and resistance to corrosion, both natural and synthetic iridosmine are used for tips of pen nibs, surgical needles, and sparking points in engines. Similar alloys composed of more osmium than iridium are called siserskite. Both iridosmine and siserskite crystallize in the hexagonal system. For detailed properties, see native element (table).

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Universalium. 2010.

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Look at other dictionaries:

  • iridosmine — ● iridosmine nom féminin Alliage naturel d iridium et d osmium, du système hexagonal, se trouvant dans les gisements de platine. ● iridosmine (synonymes) nom féminin Alliage naturel d iridium et d osmium, du système hexagonal, se trouvant...… …   Encyclopédie Universelle

  • Iridosmine — Ir i*dos mine, Iridosmium Ir i*dos mi*um, n. [Iridium + osmium.] (Min.) The native compound of iridium and osmium. It is found in flattened metallic grains of extreme hardness, and is often used for pointing gold pens. [1913 Webster] …   The Collaborative International Dictionary of English

  • iridosmine — [ir΄i däz′mē əm, ī΄ri däz′mē əm, ir΄i däs′mē əm, ī΄ri däs′mē əmir΄i däz′min, ī΄ridäz′min; ir΄i däs′min, ī′′ridäs′min; ir΄i däz′mēn, ī΄rə däz′mēn, ir΄i däs′mēn, ī΄rə däsmēn] n. [< IRIDIUM + OSMIUM] a native alloy of iridium and osmium… …   English World dictionary

  • iridosmine — sisertskitas statusas T sritis chemija apibrėžtis Mineralas. formulė (Os,Ir) atitikmenys: angl. iridosmine; syssertskit rus. иридосмин; сысертскит ryšiai: sinonimas – iridosminas …   Chemijos terminų aiškinamasis žodynas

  • iridosmine — noun Etymology: German, from New Latin iridium + osmium Date: 1827 a mineral that is a native iridium osmium alloy usually containing some rhodium and platinum …   New Collegiate Dictionary

  • iridosmine — (i ri do smi n ) s. f. Terme de minéralogie. Alliage naturel d iridium et d osmium …   Dictionnaire de la Langue Française d'Émile Littré

  • iridosmine — iri·dos·mine …   English syllables

  • iridosmine — ir•i•dos•mine [[t]ˌɪr ɪˈdɒz mɪn, ˈdɒs [/t]] n. mel a native alloy of iridium and osmium, usu. containing some rhodium, ruthenium, platinum, etc., used esp. for the points of gold pens • Etymology: 1820–30 …   From formal English to slang

  • iridosmine — /ɪrəˈdɒzmən/ (say iruh dozmuhn), /aɪrə / (say uyruh ) noun a native alloy of iridium and osmium, usually containing some rhodium, ruthenium, platinum, etc., used especially for the points of gold pens; osmiridium. Also, iridosmium. {irid(ium) +… …  

  • iridosmine — noun a hard and corrosion resistant mineral that is a natural alloy of osmium and iridium (usually containing small amounts of rhodium and platinum); used in needles and pen nibs etc. • Syn: ↑osmiridium • Hypernyms: ↑mineral …   Useful english dictionary

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