Specifications: Rhenium Rhenium is a chemical element with the symbol Re and atomic number 75. A silvery-white, rare, heavy, polyvalent transition metal, rhenium resembles manganese chemically and is used in some alloys. Rhenium is obtained as a by-product of molybdenum refinement and rhenium-molybdenum alloys are superconducting.[1] It was the last naturally occurring element to be discovered[2] and belongs to the ten most expensive metals on Earth (over US$ 7500.-/kg).
