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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.
Synthesis occurs at high temperatures (~1000 °C) from a mixture of MgB 2 and OsCl 3. [37] Three osmium borides are known: OsB, Os 2 B 3 and OsB 2. The first two have hexagonal structure, [38] similar to that of rhenium diboride. Osmium diboride was first also sought as hexagonal, [39] but one of its phases was later reassigned to orthorhombic.
The parent compound is [(η 6-cymene)RuCl 2] 2. This half-sandwich compound is prepared by the reaction of ruthenium trichloride with the terpene α-phellandrene. The osmium complex is also known. [5] Hydrogenation gives the saturated derivative p-menthane.
Osmium dioxide is an inorganic compound with the formula OsO 2. It exists as brown to black crystalline powder, but single crystals are golden and exhibit metallic conductivity. It exists as brown to black crystalline powder, but single crystals are golden and exhibit metallic conductivity.
Osmium diphosphide is a binary inorganic compound of osmium metal and phosphorus with the chemical formula OsP 2. Synthesis. Osmium diphosphide can be obtained by ...
Osmium pentacarbonyl is the organoosmium compound with the formula Os(CO) 5. It is the simplest isolatable carbonyl complex of osmium. Osmium pentacarbonyl is a colorless volatile liquid that is obtained by treating solid triosmium dodecacarbonyl under 200 atmospheres of carbon monoxide at 280-290 °C.
Kings of Atlantis is an American animation series produced exclusively for YouTube Premium (then known as YouTube Red) and YouTube Kids, based on and starring Cody Owen and Joseph Kenny, a Minecraft gaming duo known online as TheAtlanticCraft. The series premiered on April 7, 2017, and lasted one season which ended on May 26, 2017.
Osmium hexafluoride is a yellow crystalline solid that melts at 33.4 °C and boils at 47.5 °C. [1] The solid structure measured at −140 °C is orthorhombic space group Pnma . Lattice parameters are a = 9.387 Å , b = 8.543 Å, and c = 4.944 Å.