Melting Point1900◦C/3500◦F +/-10◦2470◦C/4490◦F +/-10◦ 3010◦C/5460◦F +/-10◦ Boiling Point3380◦C/5400◦ F +/- 10◦4740◦C/8570◦F +/-10◦5450◦C/9850◦F +/-10◦ Molar Mass8.32 / cm^310.83 / cm^310.85 / cm^3
Geologically, the amount of naturally occurring vanadium is twenty-five hundredths of one percent (0.250 %). This is much lower than niobium and tantalum, which are found to be one hundred percent and ninety-nine and nine hundred eighty-eight thousandths of one percent (100% and 99.988%) naturally occurring, respectively. Vanadium is not found as a free metal in nature, which is a trait that it shares with dubnium. However, natural vanadium is a mixture of two isotopes [^50V (0.24%) and ^51V (99.76%)] and it can be found in over fifty different minerals; some of the minerals containing vanadium are: the ore carnotite combined with uranium [K2(UO2)2(VO4)2.3H2O]; lead is combined with vanadium in vanadanite [Pb5(VO4)3Cl]; and sulfur combined with vanadium in patronite (VS4). It is also present in deposits containing carbon such as crude oils, coal, oil shale, and tar sands. This information seems almost contradictory but the quantity, of this element, that can actually found in these minerals are minimal. This is rather interesting considering the parts per billion (by weight) of vanadium that can be found in the universe, in crustal rocks, and in sea water and in comparison to niobium and tantalum.
Universe1,000 ppb2 ppb0.8 ppb
Crustal Rocks190,000 ppb17,000 ppb1,700 ppb
Sea Water1.5 ppb0.001 ppb0.002 ppb
For an element, like vanadium, to have a much smaller likelihood, compared to other members of its group, to be found naturally occurring, it is rather intriguing that the parts per billion of that element that can be found in the universe of this element is much greater than that of an element that is said to be one-hundred percent naturally occurring, niobium. Vanadium is the nineteenth most abundant element in the Earth's crust. Of further interest, vanadium is the only element, of group 5B, to be found, at all, in the human body, with thirty parts per billion (by weight). In meteorites, Vanadium has also been uncovered, in minute percentages, and the spectra of vanadium have been detected, in light from some stars and from the sun. It is absolved instinctively into the air, by the formation "of continental dust, marine aerosols, and volcanic emissions." Usually the releases, from combustion of fossil fuels, are in the structure of vanadium oxides, which are responsible for close to two-thirds of the vanadium found in out atmosphere. The level of vanadium in the atmosphere...