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Previous | Home | NextAntropoff presented his table in his classic paper, "Eine neue Form des periodischen Systems der Elementen," ("A New Form of the Periodic System of the Elements"), Zeitschrift f�r angewandte Chemie, 1926, 39, 722-725. In this closeup, lutetium was called "casseopeium." {LINK: Althofen234} "Seltene Erdmetalle" means "Rare earth metals." "Tu" was the former symbol for "Tm" (thulium).
