Iridium (ir) - SpringerLink
2023年7月13日 · This chapter describes native Iridium, important PGE ore (abbrv. Ir), as seen with optical, reflected light microscopy. After summing up compositional data, main properties and optical parameters, the presentation follows a systematic scheme to facilitate...
Iridium: Mineral information, data and localities. - mindat.org
Natural iridium often contains distinct amounts of Os, Ru or Pt. The definition of iridium now incorporates old " osmiridium " and " ruthenosmiridium " mineral species (all have Ir as the dominant element).
Iridium - Wikipedia
Iridium was discovered in 1803 in the acid-insoluble residues of platinum ores by the English chemist Smithson Tennant. The name iridium, derived from the Greek word iris (rainbow), refers to the various colors of its compounds.
First Finds of Native Iridium in Chromite–Platinum Ledge Ore and ...
2021年8月1日 · The results of studying the aggregates of native iridium from chromitites of the Svetloborskii and Sosnovskii clinopyroxenite–dunite massifs of the platinum-bearing belt of the Urals and...
Iridium (ir): Ir: Cubic - ResearchGate
2023年7月13日 · This chapter describes native Iridium, important PGE ore (abbrv. Ir), as seen with optical, reflected light microscopy. After summing up compositional data, main properties and optical...
Native metal - Wikipedia
Native metals were prehistoric man's only access to metal, since the process of extracting metals from their ores is thought to have been discovered around 6500 BC. However, native metals could be found only in impractically small amounts, so while copper and iron were known well before the Copper Age and Iron Age , they did not have a large ...
Iridium Mineral Data
Named after the element Iridium which was from the Latin, Iris = "rainbow" in allusion to the colored salts derived from its compounds. Comments: Silvery metallic crystalline iridium micrograin and irregular nuggets. Location: Fox Gulch, Goodnews Bay, …
Review Origin and depositional history of platinum-group …
2022年5月1日 · Furthermore, he described the occurrence of native osmium and native iridium exsolutions in Pt-Fe alloys. These observations were recently confirmed by EPMA of platinum nuggets and associated PGM recovered from the Nizhni Tagil placers.”
Native Ore of Iridium - British & Exotic Mineralogy
The ore of Iridium is found in brighter and flatted grains among the Peruvian Platinum, having an appearance of their having received some flattening blows from an hammer on a polished anvil, giving them a specular brightness. They are in general more or less irregularly angular, with their edges slightly worn; in colour almost as dark as Lead ...
Where does Iridium Come From? Extra-terrestrial or Volcanic?
2019年10月14日 · Ir is found in nature as a native element and in natural alloys; in particular the IrOs alloys, osmiridium (Os rich), and iridosmium (Ir rich). In the Ni and Cu deposits, the platinum group metals can be found as sulfides (i.e., (Pt,Pd)S), tellurides (i.e., PtBiTe), antimonides (PdSb), and arsenides (i.e. PtAs2).