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Qu'est-ce (qui) est Osmium - définition

CHEMICAL ELEMENT WITH SYMBOL OS AND ATOMIC NUMBER 76

Element 76; Osmic; Osmous; Os (element); Ptene; Osmium compound; Compounds of osmium; History of osmium

Osmium

·noun A rare metallic element of the platinum group, found native as an alloy in platinum ore, and in iridosmine. It is a hard, infusible, bluish or grayish white metal, and the heaviest substance known. Its tetroxide is used in histological experiments to stain tissues. Symbol Os. Atomic weight 191.1. Specific gravity 22.477.

osmium

['?zm??m]

¦ noun the chemical element of atomic number 76, a hard, dense silvery-white metal. (Symbol: Os)

Origin

C19: mod. L., from Gk osme 'smell' (from the pungent smell of one of its oxides).

Osmium

Osmium (from Greek ) is a chemical element with the 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.

https://en.wikipedia.org/wiki/Osmium

Wikipédia

Osmium

Osmium (from Ancient Greek ὀσμή (osmḗ) 'smell') is a chemical element with the 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. When experimentally measured using X-ray crystallography, it has a density of 22.59 g/cm³. Manufacturers use its alloys with platinum, iridium, and other platinum-group metals to make fountain pen nib tipping, electrical contacts, and in other applications that require extreme durability and hardness.

Osmium is among the rarest elements in the Earth's crust, making up only 50 parts per trillion (ppt). It is estimated to be about 0.6 parts per billion in the universe and is therefore the rarest precious metal.

https://en.wikipedia.org/wiki/Osmium

Exemples du corpus de texte pour Osmium

1. Earlier Wednesday, the Prime–Tass news agency quoted documents it had obtained from the ministry as stating that the license to export platinum and sister metals rhodium, iridium, ruthenium and osmium was issued April 23 and would last until the end of 2008. (Reuters) Gas Tax to Be Differentiated Russia will look at differentiating the gas extraction tax from 200' after possibly increasing the tax at the start of 2008, Interfax reported Wednesday, citing Kirill Androsov, deputy economic development and trade minister.