Klaproth's detection of a previously unknown constituent of the mineral pitchblende.
Peligot, who prepared the pure metal, that Klaproth's product was really an oxide.
Vauquelin in 1797, and Klaproth's investigation of tellurium in 1798, the next important series of observations was concerned with platinum and the allied metals.
These results were adopted until Peligot in 1840 discovered that Berzelius's (and Klaproth's) metal contains oxygen, and that his (Ur 2) 0 3 really is (U606) 03= 3U 2 0 3, where U= 120 is one equivalent weight of real uranium.
The principal feature of Klaproth's erudition was the vastness of the field which it embraced.
Klaproth's other works include: Reise in den Kaukasus and Georgien in den Jahren 1807 and 1808 (Halle, 1812-1814; French translation, Paris, 1823); Geographisch-historische Beschreibung des ostlichen Kaukasus (Weimar, 1814); Tableaux historiques de l'Asie (Paris, 1826); Memoires relatifs a l'Asie (Paris, 1824-1828); Tableau historique, geographique, ethnographique et politique de Caucase (Paris, 1827); and Vocabulaire et grammaire de la langue georgienne (Paris, 1827).