crude platinum

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• platinum group — ▪ chemical element group Introduction       six metals, in order of increasing atomic weight, ruthenium (Ru), rhodium (Rh), palladium (Pd), osmium (Os), iridium (Ir), and …   Universalium

• Platinum group — The platinum group (alternatively, the platinum group metals or platinum metals) is a collective name sometimes used for six metallic elements clustered together in the periodic table. These elements are all transition metals, lying in the d… …   Wikipedia

• Palladium — (pronounced pəˈleɪdiəm) is a rare and lustrous silvery white metal that was discovered in 1803 by William Hyde Wollaston, who named it palladium after the asteroid Pallas, which in turn, was named after the epithet of the Greek goddess Athena,… …   Wikipedia

• Ruthenium — (pronEng|ruːˈθiːniəm) is a chemical element that has the symbol Ru and atomic number 44. A rare transition metal of the platinum group of the periodic table, ruthenium is found associated with platinum ores and used as a catalyst in some platinum …   Wikipedia

• Rhodium — Rh redirects here. For other uses, see rh (disambiguation) Rhodium (pronEng|ˈroʊdiəm) is a chemical element with the symbol Rh and atomic number 45. A rare, silvery white hard transition metal and a member of the platinum group, rhodium is found… …   Wikipedia

• rhodium — /roh dee euhm/, n. Chem. a silvery white metallic element of the platinum family, forming salts that give rose colored solutions: used to electroplate microscopes and instrument parts to prevent corrosion. Symbol: Rh; at. wt.: 102.905; at. no.:… …   Universalium

• Wollaston, William Hyde — ▪ British scientist Introduction born Aug. 6, 1766, East Dereham, Norfolk, Eng. died Dec. 22, 1828, London  British scientist who enhanced the techniques of powder metallurgy to become the first to produce and market pure, malleable platinum. He… …   Universalium

• Timeline of chemical elements discoveries — The discovery of the elements known to exist today is presented here in chronological order. The elements are listed generally in the order in which each was first defined as the pure element,[clarification needed] as the exact date of discovery… …   Wikipedia

• 1804 in science — The year 1804 in science and technology involved some significant events, listed below.ChemistryThe drug morphine is isolated, and many elements are discovered, including cerium, iridium, osmium, palladium, and rhodium: * William Hyde Wollaston… …   Wikipedia

• 1804 in archaeology — The year 1804 in archaeology involved some significant events.ExplorationsExcavations* In southern France, the Ratapignata Pyramid ( Aven de Ratapignata ) is discovered on the hillside north of Nice, France and northwest of Falicon. It was… …   Wikipedia

• Business and Industry Review — ▪ 1999 Introduction Overview        Annual Average Rates of Growth of Manufacturing Output, 1980 97, Table Pattern of Output, 1994 97, Table Index Numbers of Production, Employment, and Productivity in Manufacturing Industries, Table (For Annual… …   Universalium