Vanadium Boride, VB, is prepared by fusing a mixture of the elements in vacuo at the temperature of the electric furnace. It is a hard, metallic substance, which is attacked by nitric acid, hydrofluoric acid, and fused alkali.
A vanadium borate of uncertain composition is obtained by fusing a mixture of vanadium pentoxide and boric anhydride. It forms green or yellowish-green crystals which, however, undergo hydrolysis readily. A vanadyl borate is also obtained by the action of borax on vanadyl sulphate solution, and a complex vanadium borotungstate has been prepared. |