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Title: Chemistry/Elements/Rhenium - Lenntech: Rhenium Physical data, chemical properties, and health effects.
Rhenium Data tables and historic information.

USGS_Minerals_Information__Rhenium Statistics and information on the worldwide supply, demand, and flow of the element (PDF format).

Visual_Elements__Rhenium General and physical information, source, uses, key isotopes, and ionisation energies.

WebElements__Rhenium Extensive information on history, uses, occurrence, compounds, and properties.

Wikipedia__Rhenium Properties of the element, including its history, applications, and characteristics.

Radiochemistry_of_Rhenium Full text of the monograph by G. W. Leddicotte (Oak Ridge National Laboratory, Oak Ridge, Tennessee). [PDF] (March, 1961)


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Rhenium (Re) - Chemical properties, Health and Environmental effects _uacct = "UA-54093-1"; urchinTracker(); Rhenium (Re) - Nederlands Rhenium (Re) - Deutsch Rhenium (Re) - Français Renio (Re) - Español  

  Rhenium - Re

Search : Contact us  Chemical properties of rhenium - Environmental effects of rhenium - Chemical effects of rehnium

 

Atomic number 75 Atomic mass 186.23 g.mol -1 Electronegativity according to Pauling 1.9 Density 20.5 g.cm-3 at 20°C Melting point 3170 °C Boiling point 5627 °C Vanderwaals radius  0.138 nm Ionic radius unknown Isotopes 9 Electronic shell  [ Xe ] 4f14 5d5 6s2 Energy of first ionisation 759 kJ.mol -1 Standard potential 0.25 V ( ReO2/ Re ) Discovered by Walter Noddack in 1925     Rhenium - Re

Rhenium

Rhenium is a silvery metal but rarely seen as such on account of its high melting point, which is the third highest after carbon and tungsten. Rhenium is very hard, it resists corrosion but slowly tarnishes in moist air. Applications Rhenium is used as an important component in superalloys for blades in turbine engines and this is the major use today. Rhenium is an ideal metal for use at very high temperatures, which makes it suitable for rockets motors. Rhenium is added to tungsten and molybdenum to form alloys that are used as filaments for ovens and lamps. It is also used in thermocouples which can measure temperatures above 2000 C, and for electrical contacts which stand up well to electric arcs. Rhenium, alloyed with platinum, was used in petroleum-reforming catalysis in the production of high-octane hydrocarbons, used for lead free gasoline. Other applications are rhenium-tungsten alloys in X-raytubes and rotating X-ray anodes. Rhenium-molybdenum alloys are superconductors at a temperature of 10K. Rhenium has occasionally been used for plating jewerly. Rhenium in the environment Rhenium does not occur as the free uncombined metal, and no mineable ore has been found. The ores gadolinite and molybdenite may contain a little rhenium and it is from the latter of these that rhenium is extracted via the flue dusts of molybdenium smelters. World annual production is now around 5 tonne and the estimated reserves of rhenium are 3500 tonnes, found mainly in USA, Russia and Chile.

Health effects of rhenium

Little is known about rhenium toxicity. Potential health effects: May cause eye irritation. May cause skin irritation. Liquid may cause burns to skin and eyes. Ingestion: May cause irritation of the digestive tract. Inhalation: May cause respiratory tract irritation. The toxicological properties of this substance have not been fully investigated. Vapors may cause dizziness or suffocation.

Environmental effects of rhenium

There is so little rhenium in the environment that virtually nothing is known of how it would behave in soil, plants anr animals. There are no instances of pollution by rhenium salts from mining or industry. No information was found on the environmental toxicity of rhenium.   Back to chart periodic elements.   [ Home ] [ Back ] [ More Information or question on Rhenium? ] Copyright © 1998-2008 Lenntech Water treatment & air purification Holding B.V. Rotterdamseweg 402 M 2629 HH Delft, The Netherlands tel: (+31)(0)15 26.10.900 fax: (+31)(0)15 26.16.289 e-mail: info@lenntech.com
 

Physical

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