Crossword clues for platina
The Collaborative International Dictionary
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 of atomic number 78, one of the noble metals, classed with silver and gold as a precious metal, occurring native or alloyed with other metals and also as the platinum arsenide (sperrylite). It is a heavy tin-white metal which is ductile and malleable, but very infusible (melting point 1772[deg] C), and characterized by its resistance to strong chemical reagents. It is used for crucibles in laboratory operations, as a catalyst, in jewelry, 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 195.1. 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.
Wiktionary
n. (context chemistry obsolete English) platinum
Wikipedia
Platina is a municipality ( município) in the state of São Paulo in Brazil. The population is 3,434 (2015 est.) in an area of 326.73 km². The elevation is 466 m.
Platina may refer to:
- Platina, a municipality in Brazil
- Platina, California, an unincorporated community in the United States
- Piadena ("Platina" in Latin), an Italian village
- Bartolomeo Platina, a 15th-century author
- Nissan Platina, one alternative name of the Renault Clio
Usage examples of "platina".
There was a certaine man in the court of the Emperour, which had many offices, and in great favour, who at last by the envy of divers persons, was banished away and compelled to forsake the court : his wife Platina, a woman of rare faith and singular shamefastnes having borne ten children to her husband, despised all worldly Pompe and delicacy, and determined to follow her husband, and to be partaker of his perils and danger, wherefore shee cut off her haire, disguised her selfe like a man, and tooke with her all her treasure, passing through the hands of the souldiers, and the naked swords without any feare, whereby she endured many miseries, and was partaker of much affliction, to save the life of her husband, such was her love which she bare unto him.