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Wilhelm Klemm
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<p>Wilhelm Karl Klemm (5 January 1896 – 24 October 1985) was an <a href="/facts/Inorganic_chemistry/ErD6ypnb">inorganic</a> and <a href="/facts/Physical_chemistry/WqwnJjRM">physical chemist</a>. Klemm did extensive work on <a href="/facts/Intermetallic_compounds/nnzksayl">intermetallic compounds</a>, <a href="/facts/Rare_earth_metals/PQSUQumk">rare earth metals</a>, <a href="/facts/Transition_elements/0slGWoLQ">transition elements</a> and compounds involving <a href="/facts/Oxygen/acyn6o8r">oxygen</a> and <a href="/facts/Fluorine/YUV0Fb8m">fluorine</a>. He and Heinrich Bommer were the first to isolate elemental <a href="/facts/Erbium/XEJlgJcx">erbium</a> (1934) and <a href="/facts/Ytterbium/3lerM9uf">ytterbium</a> (1936). Klemm refined <a href="/facts/Eduard_Zintl/KtBPmD9D">Eduard Zintl</a>'s ideas about the structure of <a href="/facts/Intermetallic_compounds/nnzksayl">intermetallic compounds</a> and their connections to develop the <a href="/facts/Zintl_phase/RdV0yDXf">Zintl-Klemm concept</a>. </p><p>Klemm co-authored one of the ten most-cited papers in the history of the journal <i><a href="/facts/Zeitschrift_f%25C3%25BCr_anorganische_und_allgemeine_Chemie/7yTth9qf">Zeitschrift für anorganische und allgemeine Chemie</a></i>. His textbooks on inorganic chemistry became standard works for chemists. His <i>Magnetochemie</i> (c1936) is considered foundational to <a href="/facts/Magnetochemistry/DAjFkw6S">magnetochemistry</a>. <i>Anorganische Chemie</i> (<i>Inorganic Chemistry</i>) by Klemm and <a href="/facts/Rudolf_Hoppe/C7m1JJNm">Rudolf Hoppe</a> has been described as a legendary work by two titans of solid state chemistry. </p><p>Klemm was the second President of the <a href="/facts/Gesellschaft_Deutscher_Chemiker/Jn2DuBo6">Gesellschaft Deutscher Chemiker</a> (GDCh), serving from 1952 to 1953. He was President of the <a href="/facts/International_Union_of_Pure_and_Applied_Chemistry/2AV6myCK">International Union of Pure and Applied Chemistry</a> (IUPAC) from 1965 to 1967. Klemm co-edited the journal <i><a href="/facts/Zeitschrift_f%25C3%25BCr_anorganische_und_allgemeine_Chemie/7yTth9qf">Zeitschrift für anorganische und allgemeine Chemie</a></i> from 1939 to 1965. Since 1985, the GDCh has awarded the Wilhelm Klemm Prize in his honor. </p>