Karl Klaus, professor at Kazan State University,…

Karl Klaus, professor at Kazan State University, re-investigates Gotttfrid Osann's platinum residues and establishes the existence of the rare metal ruthenium in 1844, after a four-year investigation involving fifteen pounds of native platinum.

The Livonian chemist retains the name, which honors Ruthenia, the Latinized word for Russia, where the metal-bearing ore is first mined.