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Atomic Number:75Atomic Symbol : ReAtomic Weight:186.207Melting Point:5,766.8 F ( 3,186 C)Boiling Point:10,104.8 F ( 5,596 degree Celsius )
Word rootage : Rhenium come from the Latin termRhenusmeaning Rhine .
Rhenium
find : Rhenium is generally considered to have been get word by Walter Noddack , Ida Tacke and Otto Berg in Germany in 1925 . They detected the element in platinum ore and columbite as well as in ytterbite and molybdenite .
dimension of Re
Re is a silvery white element with a metal luster . It has a high density point exceeded only by Pt , iridium and osmium , and its melting point is exceeded only bytungstenandcarbon .
The common commercial form of the element is gunpowder , but it can be consolidated by press and resistance - sinter in a vacuum orhydrogenatmosphere . Annealed rhenium can be bent , coiled , or roll . [ SeePeriodic board of the Elements ]
Sources of rhenium
Commercial rhenium is obtain frommolybdenumroaster - flue debris found in cop - sulfide ores . However , rhenium does not occur freely in nature or as a compound in mineral ore . Molybdenum contains from 0.002 pct to 0.2 percent rhenium , and the factor is base wide spread out through the Earth ’s crust . atomic number 75 alloy is prepare by reducing ammonium ion perrhentate with H .
usance of rhenium
Rhenium had unspoilt wear resistance and can hold corrosion . Therefore , it ’s commonly used as an electric contact fabric . Rhenium wire is used in flash picture taking . It is used in hydrogenation of fine chemical substance and as an additive to tungsten and Mo - base alloys .
( Source : Los Alamos National Laboratory )
