"Nipponium" redirects here; not to be confused withNihonium.
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Masataka Ogawa (小川 正孝,Ogawa Masataka, 21 February 1865 – 11 July 1930[1]) was a Japanese chemist mainly known for the claimed discovery of element 43 (later known astechnetium), which he named nipponium. In fact, he had discovered, but misidentified, element 75 (later calledrhenium).[2][3]
After graduating from theUniversity of Tokyo, he studied underWilliam Ramsay in London, where he worked on the analysis of the rare mineralthorianite. He extracted and isolated a small amount of an apparently unknown substance from the mineral, which he announced as the discovery of element 43, naming the newly discovered elementnipponium. He published his results in 1909 and a notice was also published in theJournal of the American Chemical Society.[4] For this work, he was awarded a doctorate and the highest prize of theTokyo Chemical Society. However, no other researchers were able to replicate his discovery, and the announcement was forgotten.[5]
Ogawa served as president ofTohoku University between 1919 and 1928.[6] While the namenipponium could not be reused for another element, element 113 was also discovered by a team of Japanese scientists and is now namednihonium, also after Japan. The name was chosen in respectful homage to Ogawa's work.[7]
Empire of Japan