claim: Uranium is an elemental chemical.
evidence: Josef Johann Steinmann -LRB- 8 March 1779 in Lanskroun -- 9 July 1833 in Prague -RRB- was an Austrian pharmacist and chemist .. Lanskroun. Lanskroun. Prague. Prague. pharmacist. pharmacist. chemist. chemist. He worked as a pharmacist in Lanskroun and Prague , during which time , he conducted botanical investigations in the Riesengebirge and in Glatzer Land .. Lanskroun. Lanskroun. Prague. Prague. pharmacist. pharmacist. Riesengebirge. Krkonose. Glatzer Land. Glatzer Land. Later on , he studied pharmacy in Berlin as a student of Sigismund Friedrich Hermbstadt , then in 1806 -- 08 furthered his education at the University of Vienna , where his instructors included botanist Joseph Franz von Jacquin and naturalist Carl Franz Anton Ritter von Schreibers .. Berlin. Berlin. Sigismund Friedrich Hermbstadt. Sigismund Friedrich Hermbstadt. University of Vienna. University of Vienna. Joseph Franz von Jacquin. Joseph Franz von Jacquin. Carl Franz Anton Ritter von Schreibers. Carl Franz Anton Ritter von Schreibers. From 1812 to 1817 he served as an assistant to chemist Karl August Neumann at the Prague Polytechnical Institute , where in 1817 he was appointed a professor of chemistry .. Prague. Prague. chemist. chemist. Karl August Neumann. Karl August Neumann. Prague Polytechnical Institute. Czech Technical University in Prague. He provided chemical analyses of mineral springs at Marienbad , Bilina , Karlovy Vary , et al. , and is credited with describing a new mineral species -LRB- cronstedtite , 1821 -RRB- .. mineral springs. mineral springs. Marienbad. Marienbad. Bilina. Bilina. Karlovy Vary. Karlovy Vary. cronstedtite. cronstedtite. He also made significant contributions to the National Museum in Prague .. Prague. Prague. National Museum in Prague. National Museum ( Prague )