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The Chemical Educator

ISSN: 1430-4171 (electronic version)

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Abstract Volume 19 (2014) pp 106-105

Karl Karlovich Klaus (1796–1864) and the Discovery of Ruthenium

George B. Kauffman,*James L. Marshall, and Virginia R. Marshall

Department of Chemistry, California State University, Fresno, Fresno, CA 93740-8034,; Department of Chemistry, University of North Texas, Denton TX 76201,

Published: 13 May 2014

Abstract. Karl Karlovich Klaus (also known as Carl Ernst Claus) (1796–1864) was born in Dorpat, Russia (now Tartu, Estonia). He was a professor at the universities of Dorpat and Kazan, Russia. He discovered the last of the six platinum metals, which he named ruthenium in honor of Russia. His life and career are discussed along with earlier efforts of others to find this elusive element.roscopy, and comment on the purity of the final sample. The use of unknowns increases students’ individual responsibility and prevents using a partner’s data analysis.

Key Words: Chemistry and History; Chemistry in Russia; Chemistry in Estonia; Chemistry in Lithuania; Discovery of Elements; Inorganic Chemistry; Platinum Metals; Ruthenium; Vestium

(*) Corresponding author. (E-mail:

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