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Osmium (from Ancient Greek ὀσμή (osmḗ) 'smell') is a chemical element; it has symbol Os and atomic number 76. It is a hard, brittle, bluish-white transition metal in the platinum group that is found as a trace element in alloys, mostly in platinum ores. Osmium is the densest naturally occurring element.
Osmium(I) iodide is a metallic grey solid produced by the reaction of osmium tetroxide and hydroiodic acid heated in a water bath for 48 hours in a carbon dioxide atmosphere. It is an amorphous compound. [34] Osmium(II) iodide is a black solid [35] produced by the reaction of osmium tetroxide and hydroiodic acid at 250 °C in nitrogen: [34]
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Osmium(II) chloride or osmium dichloride is an inorganic compound composed of osmium metal and chlorine with the chemical formula OsCl 2. [1] Synthesis.
Osmium tetrasulfide is an inorganic compound, a salt of osmium metal and hydrogen sulfide acid with the chemical formula OsS 4. [1] Synthesis
Osmium(IV) fluoride is an inorganic chemical compound of osmium metal and fluorine with the chemical formula OsF 4. [1] [2] Synthesis. Passing fluorine over heated ...
Osmium(V) chloride is an inorganic chemical compound of osmium metal and chlorine with the chemical formula OsCl 5. [3] [4] Potential synthesis.