Osmium is a hard but brittle metal that remains lustrous even at high temperatures. It has a very low compressibility. Correspondingly, its bulk modulus is extremely high, reported between 395 and 462 GPa, which rivals that of diamond (443 GPa). The hardness of …

2025年2月28日 · Osmium, chemical element, one of the platinum metals of the periodic table and the densest naturally occurring element. A gray-white metal, osmium is very hard, brittle, and difficult to work, even at high temperatures. Pure osmium metal does not occur in nature.

Osmium metal is unaffected by air, water and acids, but dissolves in molten alkalis. The powdered metal slowly gives off osmium (VIII) oxide, the source of its pungent odor. Extra pure Osmium of 190.2 mol. wt. is available from Sigma-Aldrich for $140.35 per gram.

2023年11月18日 · Osmium is an extremely hard and dense metallic element with symbol Os and atomic number 76. Although it is a rare element, you encounter it in daily life in ballpoint pens and electrical contacts. English chemist Smithson Tennant discovered osmium and iridium in a sample of platinum ore in 1803.

Osmium is a Nobel metal and belongs to the platinum family. It is the densest and corrosion-resistant element. It was discovered in 1803. Osmium has an intertwined history with platinum and dates to the late 17 th century.

The melting point of osmium is 3045°C, which is the highest amongst the platinum group members, and fourth highest amongst all the elements. Presented below is tabulated data about the chemical elements with the highest melting points.

Element Osmium (Os), Group 8, Atomic Number 76, d-block, Mass 190.23. Sources, facts, uses, scarcity (SRI), podcasts, alchemical symbols, videos and images.

Osmium | Os | CID 23937 - structure, chemical names, physical and chemical properties, classification, patents, literature, biological activities, safety/hazards/toxicity information, supplier lists, and more.

Osmium is the chemical element with symbol Os and atomic number 76. Osmium forms compounds with oxidation state from -2 to 8. It is slightly attacked by aqua regia, and by fuming nitric acid, and it is attacked by molten hydroxides.

Osmium is a lustrous, silvery metal which is unaffected by acids, water, and air at room temperature. Solid osmium dissolves with molten alkalis, but the spongy or powdered metal releases osmium tetroxide. Osmium tetroxide is very toxic and can cause eye and skin damage and lung congestion. The extraction of the metal is time-consuming and complex.