Atomgewicht des Tantals

Marignac and Jørgensen: Two Forgotten Inorganic Explorers

“…After much careful work he was able to develop the fluoride fusion method to allow the separation of niobium and tantalum as K 3 NbOF 6 (soluble) and K 2 TaF 7 (slightly soluble). This allowed for the first time the separation of the two elements [2] and the isolation of a sample of niobium metal. It also saw off a number of non-existent elements such as ilmenium which were mixtures of niobium and tantalum.…”