SOME NEW FLUORIDE COMPLEXES OF TRIVALENT TITANIUM

Three new complex fluorides of trivalent titanium have been isolated from the products of electrolysis, under an inert atmosphere, of molten baths of KC1, NaCl, or mixtures of KCl and NaCl, containing either K 2 TiF 6 or Na 2 TiF 6 . Electrolytic baths containing a mixture of KCl and NaCl with either K 2 TiF 6 or Na 2 TiF 6 yielded a violet-colored, face-centered cubic compound identified as K 2 NaTiF 6 , which was virtually insoluble in water and amenable to electrostatic separation from the metallic titanium also produced in the electrolysis. Baths containing molten mixtures of K 2 TiF 6 and KCl gave a pale violet compound K 3 TiF 6 , which was slightly soluble in water. Baths containing Na 2 TiF 6 and NaCl gave a deep violet-colored compound Na 3 TiF 6 which was almost insoluble in water. The compounds K 3 TiF 6 and Na 3 TiF 6 have structures which approximate to cubic. The compounds K 2 NaTiF 6 and Na 3 TiF 6 are more stable to atmospheric oxidation than is K 3 TiF 6 . X-Ray diffraction patterns have been recorded for these compounds and some of their physical and chemical properties determined.