Niobium, tantalum, and titanium fluoride solutions

作者：Nikolaev A I; Kirichenko N V; Maiorov V G

来源：Russian Journal of Inorganic Chemistry, 2009, 54(4): 505-511.

DOI：10.1134/S0036023609040032

Parameters for the preparation of concentrated tantalum, niobium, and titanium fluoride solutions by dissolution of their oxides or hydroxides in hydrofluoric acid were studied. Anatase titania, niobium oxide, and tantalum oxide calcined to 900A degrees C were found to have high dissolution rates. Solid phases separated upon the dissolution of niobium, tantalum, and titanium oxides in hydrofluoric acid were identified as NbO(2)F, TaO(2)F, Ta(3)O(7)F, and TiOF(2). Niobium hydroxide dissolution in an autoclave at the atmospheric pressure gave various complex salts: NH(4)NbOF(4) and (NH(4))(3)Nb(2)OF(11).

• 出版日期2009-4