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| Perrhenic Acid | |
| Potassium Hexabromorhenate | |
| Potassium Hexachlororhenate | |
| Rhenium Sulfide | |
Rhenium information, including Technical Data, Safety Data and its properties, research, applications and other useful facts are discussed below. Scientific facts such as the atomic structure, ionization energy, abundance on Earth, conductivity and thermal properties are included.
Rhenium is the fourth densest element exceeded only by that of platinum, iridium, and osmium . It has the second highest melting point exceeded only by tungsten and carbon . Rhenium is available as metal and compounds with purities from 99% to 99.999% (ACS grade to ultra-high purity); metals in the form of foil, sputtering target, and rod, and compounds as submicron and nanopowder. Because of this, thermocouples made of Tungsten/Rhenium alloy is are used when temperatures will rise to 2000 C and rhenium wire is used in photoflash lamps for photography. It is widely used as filaments for mass spectrographs and ion gauges. Rhenium is also used as an electrical contact material because it has good wear resistance and withstands arc corrosion. Rhenium-molybdenum alloys are superconductive at 10 Kelvin. Rhenium catalysts are are used for oranic chemical hydrogenation. Rhenium is added to platinum catalysts that are used to produce lead-free gasoline. Due to its high melting point, it is in high-temperature superalloys used for aerospace and filaments for mass spectrographs. Rhenium facts, including appearance, CAS #, and molecular formula and safety data, research and properties are
Oxides are available in forms including powders and dense pellets for such uses as optical coating and thin film applications. Oxides tend to be insoluble. Fluorides are another insoluble form for uses in which oxygen is undesirable such as metallurgy, chemical and physical vapor deposition and in some optical coatings. Rhenium is available in soluble forms including chlorides, nitrates and acetates. These compounds are also manufactured as solutions at specified stoichiometries. Rhenium is a Block D, Group 7, Period 6 element. The electronic configuration is [Xe] 4f14 5d5 6s2. In its elemental form rhenium's CAS number is 7440-15-5. The rhenium atom has a radius of 137.1.pm and it's Van der Waals radius is 200.pm.All elemental metals, compounds and solutions may be synthesized in ultra high purity (e.g. 99.999%) for laboratory standards, advanced electronic, metallurgy and optical materials and other high technology advantages. Information is provided for stable (non-radioactive) isotopes. Organo-Metallic Rhenium compounds are soluble in organic or non-aqueous solvents. See Analytical Services for information on available certified chemical and physical analysis techniques including MS-ICP, X-Ray Diffraction, PSD and Surface Area (BET) analysis. Rhenium was first discovered by Walter Noddack in 1925.
Abundance. The following table shows the abundance of rhenium and each of its naturally occurring isotopes on Earth along with the atomic mass for each isotope. |
rhénium
Rhenium
renio
Rênio
renio
RheniumIsotope |
Atomic Mass |
% Abundance on Earth |
Re-185 |
184.952956 |
37.40 |
Re-187 |
186.955751 |
62.60 |
Safety Data. The safety data for rhenium metal, nanoparticles and its compounds can vary widely depending on the form. For potential hazard information, toxicity, and road, sea and air transportation limitations, such as DOT Hazard Class, DOT Number, EU Number, NFPA Health rating and RTECS Class, please see the specific material or compound referenced in the left margin.
Ionization Energy. The ionization energy for rhenium (the least required energy to release a single electron from the atom in it's ground state in the gas phase) is stated in the following table: |
1st Ionization Energy |
755.82 kJ mol-1 |
2nd Ionization Energy |
- kJ mol-1 |
3rd Ionization Energy |
- kJ mol-1 |
Conductivity. As to rhenium's electrical and thermal conductivity, the electrical conductivity measured as to electrical resistivity @ 20 ºC is 19.3 μΩcm and its electronegativities (or its ability to draw electrons relative to other elements) is 1.9. The thermal conductivity of rhenium is 47.9 W m-1 K-1.
Thermal Properties. The melting point and boiling point for rhenium are stated below. The following chart sets forth the heat of fusion, heat of vaporization and heat of atomization. |
Heat of Fusion |
33.1 kJ mol-1 |
Heat of Vaporization |
704.25 kJ mol-1 |
Heat of Atomization |
769 kJ mol-1 |
| Formula | Atomic Number | Molecular Weight | Electronegativity (Pauling) | Density | Melting Point | Boiling Point |
Vanderwaals radius |
Ionic radius | Energy of first ionization |
| Re | 75 | 186.23 g.mol -1 | 1.9 | 20.5 g.cm-3 at 20 °C | 3170 °C | 5627 °C | 200.pm | unknown | 755.82 kJ.mol-1 |
| PRODUCT CATALOG | UK Operations | Submicron & Nanopowder | Tolling | Ultra High Purity | Sputtering Target | Crystal Growth | Rod, Plate, Powder, etc. | Foil |
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