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Rhenium (Re)
We are a leading manufacturer and supplier of research materials
Rhenium 75Re186.2
Discovered in 1925 by W. Noddack, Ida Tacke and O. Berg at Berlin, Germany.
[Greek, Rhenus = river Rhine]
French: Rhénium
German: Rhenium
Italian: Renio
Spanish: Renio
Description: Rhenium is a silvery metal, but is usually obtained as a grey powder. It resists corrosion but slowly tarnishes in moist air. Rhenium dissolves in HNO3 an H2SO4. It is used in filaments, thermistors and catalysts.
Rhenium single crystal properties
| State: | Single crystal |
|---|---|
| Crystal structure: | hexagonal |
| Production method: | Floating zone |
| Standard size: | diameter 6mm thickness 1-2mm |
| Orientation: | (0001), (1-100) and (11-20) |
| Orientation accuracy: | <2°, <1°, <0.4° or <0.1° |
| Polishing: | as cut, one or two sides polished |
| Roughness of surface: | <0.03µm |
| Purity: | 99.99% |
| Typical analysis (ppm): | C 3 H < 1 O 9 N < 5 Cu 1.60 Fe 1.80 Ni < 1 Pb 0.30 Si 0.30 Ga, Hf and Ta are below the detection limit |
Materials properties
| Density: | 12.4 g/cm3 |
|---|---|
| Melting point: | 3179.85 °C / 3453 °K |
| Boiling point: | 5626.85 °C / 5900 °K |
| Molar volume: | 8.86 cm3 |
| Thermal conductivity: | 47.9 [300 K] Wm-1K-1 |
| Coefficient of linear thermal expansion: | 6.63 x 10-6 K-1 |
| Electrical resistivity: | 19.3x 10-8 [293 K] Wm |
| Mass magnetic susceptibility: | +4.56 x 10-9(s) kg-1m3 |
| Young's modulus: | 466 GPa |
| Rigidity modulus: | 181 GPa |
| Bulk modulus: | 334 GPa |
| Poisson's ratio: | 0.26 |
| Radii: | Re7+ 60; Re6+ 61; Re4+ 72; atomic 137; covalent 12 |
| Electronegativity: | 1.9 (Pauling); 1.46 (Allred); 4.02 eV (absolute) |
| Effective nuclear charge: | 3.60 (Slater); 10.12 (Clementi); 14.62 (Froese-Fischer) |
| Number of Isotopes (incl. nuclear isomers): | 34 |
| Issotope mass range: | 162 -> 192 |
| Crystal structure, (cell dimentions / pm), space group | hexagonal |
| X-ray diffraction: mass absorption coefficients: | CuKα 179 (µ/r) / cm2g-1 MoKα 103 (µ/r) / cm2g-1 |
| Neutron scattering length: | 0.92 b/10-12 cm |
| Thermal neutron capture cross-section: | 89.7 sa / barns |
Biological data
| Biological role: | none |
|---|---|
| Toxicity | |
| Toxic intake: | n.a. |
| Lethal intake: | LD50 (ReCl3, intraperitoneal, mouse)= 280 mg kg-1 |
| Hazards: | There are no reported cases of humans beeing affected by rhenium. Like other powdered metals, rhenium dust could pose a moderate fire or explosion hazard. |
| Level in humans | |
| Blood: | |
| Bone: | |
| Liver: | |
| Muscle: | |
| Daily dietary intake: | n.a. |
| Total mass of element in average [70 kg] person: | n.a., but very low |
Geological data
| Mineral | Formula | Density | Hardness | Crystal apperance |
|---|
| Chief ore: | Rhenium is extracted from the flue dusts of molybdenum smelters. |
|---|---|
| World production: | 4.5 tonnes/year |
| Main mining areas: | see molybdenum |
| Reserves: | 3500 tonnes |
| Specimen: | available as foil, powder, ribbon or wire. CARE ! |
| Abundances | |
|---|---|
| Sun: | <2 (relative to H = 1 x 1012) |
| Earth's crust: | 4 x 10-4 p.p.m. |
| Seawater: | |
| Residence time: | |
| Classification: | |
| Oxidation state: | III |
Source: Emsley, J. (1998) The Elements (3rd Edition)
Overview of elements with access to our shop
Tel.: +49 (0) 2461 - 9352 - 0
Fax: +49 (0) 2461 - 9352 - 11
Fax: +49 (0) 2461 - 9352 - 11