Rhenium (Re)
Rhenium was discovered in platinum ore and columbite in 1925. It does not occur alone in nature or in a specific mineral but is widespread throughout the earth's crust.
This element is silvery white with a metallic luster, and, as a powder, can be consolidated, annealed, bent, coiled, or rolled. Natural rhenium is a mixture of two stable isotopes; the other 26 are unstable.
Rhenium is also used in filaments for mass spectrographs, ion gauges, and photoflash lamps. Rhenium catalysts resist poisoning from nitrogen, sulfur, and phosphorus, and are used for hydrogenating fine chemicals.
 
                                    
                             
                                                             
                                                                             
                                                             
                                                             
                                                             
                                                             
                                                             
                                                             
                                                             
                                                             
                                                             
                                                             
                                                             
                                                             
                                                            