| When titanium is dissolved in hydrofluoric acid the tetrafluoride alone results, but the Titanium Trifluoride, TiF3, is formed as an insoluble violet powder when potassium titanifluoride, K2TiF6, is ignited in a current of hydrogen, or when the same substance is reduced in solution with zinc and hydrochloric acid, or by sodium amalgam. The complex salts (NH4)2TiF5 and (NH4)3TiF6 have been obtained; and the latter appears to be isomorphous with (NH4)3CrF6, (NH4)3VF6, and (NH4),FeF6. |