Hemijski elemenat, teško topljiv metal, pronađen u uralskoj platinskoj rudi (lat.)
Sinonimi: Ru | atomic number 44
ETYM New Lat. So named from the Ruthenians, a Little Russian people, as coming from Russia, the metal having been found in the Ural mountains.
Hard, brittle, silver-white, metallic element, symbol Ru, atomic number 44, atomic weight 101.07. It is one of the so-called platinum group of metals; it occurs in platinum ores as a free metal and in the natural alloy osmiridium. It is used as a hardener in alloys and as a catalyst; its compounds are used as coloring agents in glass and ceramics.
It was discovered by J A Sniadecki in Vilno, Poland 1808, and then rediscovered 1828 by G W Osann and named for its place of discovery, the Ural mountains in Ruthenia (now part of the Ukraine). Pure ruthenium was isolated in 1845 by K K Klaus.
A rare polyvalent metallic element of the platinum group; it is found associated with platinum; SYN. Ru, atomic number 44.