41. The mineral was mined for its vanadium , with uranium as a byproduct. 42. The cofactor which may be either heme or vanadium . 43. Titanium and vanadium are the main by-products. 44. Other important products are Ferro-Vanadium , Tungsten Metal and Chrome Metal. 45. Other groups have used vanadium oxide thin films on carbon nanotubes for pseudocapacitors. 46. Vanadium pentafluoride is a weaker acid and mainly undergoes oxidative and fluorinating reactions.47. It has the same crystal structure as vanadium pentafluoride. 48. The methods used for titanium and zirconium aren t effective with vanadium complexes. 49. Although vanadium phosphinimides are isolable, they are not very highly active catalysts. 50. Traces of vanadium in high-temperature combustion products form droplets of molten vanadates.