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rhenium (Re)





rhenium
Rhenium.
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A very hard, silvery-white transition element in group VIIB of the periodic table. It is very rare, and is obtained as by-product of molybdenum extraction. Analogous to manganese, it forms compounds of all oxidation states between 0 and +7, those of the higher states being volatile and stable. Its uses are similar to those of the platinum group metals.


atomic number 75
relative atomic mass 186.21
relative density 20.5 (at 20°C)
melting point 3,180°C (5,756°F)
boiling point 5,630°C (10,166°F)


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   • INORGANIC CHEMISTRY