Definition of Platinum black. Meaning of Platinum black. Synonyms of Platinum black

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Definition of Platinum black

Platinum black
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 black from wikipedia

- Platinum black (Pt black) is a fine powder of platinum with good catalytic properties. The name of platinum black is due to its black color. It is used...
- Platinum is a chemical element; it has symbol Pt and atomic number 78. It is a dense, malleable, ductile, highly unreactive, precious, silverish-white...
- becomes active after exposure to hydrogen whereupon it converts to platinum black, which is responsible for reactions. Adams' catalyst is prepared from...
- multi-platinum status in eight, platinum in twelve more, and gold in the four remaining. On the first day of its US release, 20 October 2008, Black Ice...
- American Express abandoned the black card in 1987 because the newly introduced Platinum Card offered "95% of the black card's services." In 1999, American...
- display and features a full-body magnesium alloy construction in platinum and black finish. The device is the first Surface Pro to contain a USB-C port...
- 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...
- another) The surface of platinum is platinized (i.e., covered with a layer of fine powdered platinum also known as platinum black) to: Increase total surface...
- in the UK reached number 29 on the UK Albums Chart, and was certified platinum by the British Phonographic Industry (BPI). Five singles were released...
- published in March 1993. A gold logo incentive variant as well as the ‘platinum’ (black and white with silver foil logo) version of this issue exists. Each...