Columbium dioxide, Cb202, is formed when dry potassium columbium oxyfluoride is reduced by sodium (H.
The oxyfluoride, CbOF 3, results when a mixture of the pentoxide and fluorspar is heated in a current of hydrochloric acid.
Potassium fluoxy percolumbate, K2Cb02F5 H20, is prepared by dissolving potassium columbium oxyfluoride in a 3 ° solution of hydrogen peroxide.
1866 (4), 8, p. 16) to be 94 from the analysis of potassium columbium oxyfluoride, and the same value has been obtained by T.
The oxyfluoride, Cr02F2, is obtained in a similar manner to the oxychloride by using fluorspar in place of common salt.
A double salt of the oxyfluoride, viz.
It may also be prepared by the action of selenium on sulphur oxyfluoride (H.
It does not burn in air, but explodes, under the action of a flame or the electric spark, when mixed with half its volume of oxygen, giving the oxyfluoride, POF 3.