Karl Klaus
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Karl Ernst Claus (Tartu, 22 January 1796 – 24 March 1864) was a Russian chemist of Baltic German origin, professor at Kazan State University, and discoverer of ruthenium.
Karl Ernst Claus (Tartu, 22 January 1796 – 24 March 1864) was a Russian chemist of Baltic German origin, professor at Kazan State University, and discoverer of ruthenium.