Definition of Platinum. Meaning of Platinum. Synonyms of Platinum

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Definition of Platinum

Platinum
Platinum Plat"i*num, n. [NL., fr. Sp. platina, from plata silver, LL. plata a thin plate of metal. See Plate, and cf. Platina.] (Chem.) A metallic element, intermediate in value between silver and gold, occurring native or alloyed with other metals, also as the platinum arsenide (sperrylite). It is heavy tin-white metal which is ductile and malleable, but very infusible, and characterized by its resistance to strong chemical reagents. It is used for crucibles, for stills for sulphuric acid, rarely for coin, and in the form of foil and wire for many purposes. Specific gravity 21.5. Atomic weight 194.3. Symbol Pt. Formerly called platina. Platinum black (Chem.), a soft, dull black powder, consisting of finely divided metallic platinum obtained by reduction and precipitation from its solutions. It absorbs oxygen to a high degree, and is employed as an oxidizer. Platinum lamp (Elec.), a kind of incandescent lamp of which the luminous medium is platinum. See under Incandescent. Platinum metals (Chem.), the group of metallic elements which in their chemical and physical properties resemble platinum. These consist of the light platinum group, viz., rhodium, ruthenium, and palladium, whose specific gravities are about 12; and the heavy platinum group, viz., osmium, iridium, and platinum, whose specific gravities are over 21. Platinum sponge (Chem.), metallic platinum in a gray, porous, spongy form, obtained by reducing the double chloride of platinum and ammonium. It absorbs oxygen, hydrogen, and certain other gases, to a high degree, and is employed as an agent in oxidizing.

Meaning of Platinum from wikipedia

- Platinum is a chemical element; it has symbol Pt and atomic number 78. It is a dense, malleable, ductile, highly unreactive, precious, silverish-white...
- certification categories, which are named after precious materials (gold, platinum and diamond). The threshold required for these awards depends upon the...
- Pokémon Platinum Version is a 2008 role-playing video game developed by Game Freak and published by The Pokémon Company and Nintendo for the Nintendo DS...
- Look up platinum blonde in Wiktionary, the free dictionary. Platinum blonde is a color of blonde hair. Platinum Blonde may also refer to: Platinum Blonde...
- Platinum End (****anese: プラチナエンド, Hepburn: Purachina Endo) is a ****anese manga series written by Tsugumi Ohba and illustrated by Takeshi Obata. It was serialized...
- Naturally occurring platinum (78Pt) consists of five stable isotopes (192Pt, 194Pt, 195Pt, 196Pt, 198Pt) and one very long-lived (half-life 4.83×1011 years)...
- The platinum-group metals (PGMs), also known as the platinoids, platinides, platidises, platinum group, platinum metals, platinum family or platinum-group...
- up platinum, platinic, or platinous in Wiktionary, the free dictionary. Platinum is a chemical element with symbol Pt and atomic number 78. Platinum may...
- The Platinum Jubilee of Elizabeth II was the international celebration in 2022 marking the 70th anniversary of the accession of Queen Elizabeth II on 6...
- Platinum Categorisation is a category within the FIA Drivers' Categorisation. The FIA Drivers' Categorisation is a system created by Fédération Internationale...