Rhenium Elemental Symbol

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Rhénium Rhenium Renio Rênio Renio Rhenium

Rhenium(Re) atomic and molecular weight, atomic number and elemental symbolRhenium is a Block D, Group 7, Period 6 element. The number of electrons in each of rhenium's shells is 2, 8, 18, 32, 13, 2 and its electron configuration is [Xe] 4f14 5d5 6s2. Rhenium Bohr ModelThe rhenium atom has a radius of 137.1.pm and its Van der Waals radius is 200.pm. In its elemental form, CAS 7440-15-5, rhenium has a silvery-white appearance. Rhenium is the fourth densest element exceeded only by platinum, iridium, and osmium. Elemental RheniumRhenium's high melting point is exceeded only by tungsten and carbon. Rhenium is found in small amounts in gadolinite and molybdenite. It is usually extracted from the flue dusts of molybdenum smelters. Annual world production is around 4.5 tons. Rhenium was first discovered by Masataka Ogawa in 1908. It was first isolated by Walter Noddack, also in 1908. The name Rhenium originates from the Latin word 'Rhenus' meaning "Rhine" after the place of discovery.

High-temperature rhenium super-alloys are used to make jet engine parts. Platinum-rhenium catalysts are used in lead-free, high-octane, gasoline. Rhenium is also used as a filament for mass spectrographs and ion gauges. Because Rhenium has good wear resistance and withstands arc corrosion, it is used as an electrical contact material. Thermocouples made of Re-W are used for measuring temperatures up to 2200C, and rhenium wire is used in photographic flash lamps. Rhenium is available as metal and compounds with purities from 99% to 99.999% (ACS grade to ultra-high purity). High Purity (99.999%) Rhenium Oxide (ReO2) PowderElemental or metallic forms include pellets, rod, wire and granules for evaporation source material purposes. High Purity (99.999%) Rhenium (Re) Sputtering TargetRhenium nanoparticles and nanopowders provide ultra-high surface area which nanotechnology research and recent experiments demonstrate function to create new and unique properties and benefits. Oxides are available in powder and dense pellet form 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 also available in soluble forms including chlorides, nitrates and acetates. These compounds can be manufactured as solutions at specified stoichiometries.

Very little is known about the toxicity of rhenium and its compounds. Safety data for Rhenium 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 Products tab below.

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Rhenium Properties

Symbol: Re Melting Point: 3459 K, 3186 °C, 5767 °F
Atomic Number: 75 Boiling Point: 5869 K, 5596 °C, 10105 °F
Atomic Weight: 186.207 Density: 21.02 g·cm−3
Element Category: transition metal Liquid Density @ Melting Point: 18.9 g·cm−3
Group, Period, Block: 7, 6, d Specific Heat: 0.14 (kJ/kg K)
    Heat of Vaporization 704.25 kJ mol-1
CHEMICAL STRUCTURE Heat of Fusion 33.1 kJ mol-1
Electrons: 75 Thermal Conductivity: 48.0 W·m−1·K−1
Protons: 75 Thermal Expansion: 6.2 µm/(m·K)
Neutrons: 111 Electrical Resistivity: (20 °C) 193 nΩ·m
Electron Configuration: [Xe] 4f145d56s2 Electronegativity: 1.9 (Pauling scale)
Atomic Radius: 137 pm Tensile Strength: N/A
Covalent Radius: 151±7 pm Molar Heat Capacity: 25.48 J·mol−1·K−1
Van der Waals radius: 200.pm Young's Modulus: 463 GPa
Oxidation States: 7, 6, 5, 4, 3, 2, 1, 0, -1 (mildly acidic oxide) Shear Modulus: 178 GPa
Phase: Solid Bulk Modulus: 370 GPa
Crystal Structure: hexagonal close-packed Poisson Ratio: 0.30
Magnetic Ordering: paramagnetic Mohs Hardness: 7.0
1st Ionization Energy: 760 kJ·mol−1 Vickers Hardness: 2450 MPa
2nd Ionization Energy: 1260 kJ·mol−1 Brinell Hardness: 1320 MPa
3rd Ionization Energy: 2510 kJ·mol−1 Speed of Sound: (20 °C) 4700 m·s−1
CAS Number: 7440-15-5 Abundance in typical human body, by weight: N/A
ChemSpider ID: 22388 Abundance in typical human body, by atom: N/A
PubChem CID: 23947 Abundance in universe, by weight: 0.2 ppb
MDL Number: MFCD00011195 Abundance in universe, by atom: 0.001 ppb
EC Number: 231-124-5 Discovered By: Masataka Ogawa
Beilstein Number: N/A Discovery Date: 1908
SMILES Identifier: [Re]  
InChI Identifier: InChI=1S/Re Other Names: Rhénium, Renio, Rênio

Rhenium Products

Metal Forms  •  Compounds  •  Alloys  •  Oxide Forms  •  Organometallic Compounds
Sputtering Targets  •  Nanomaterials  •  Semiconductor Materials •  Isotopes

Recent Research & Development for Rhenium

  • Josh Kacher, Andrew M. Minor, Twin boundary interactions with grain boundaries investigated in pure rhenium, Acta Materialia, Volume 81, December 2014
  • Makoto Fukuda, Kiyohiro Yabuuchi, Shuhei Nogami, Akira Hasegawa, Teruya Tanaka, Microstructural development of tungsten and tungsten–rhenium alloys due to neutron irradiation in HFIR, Journal of Nuclear Materials, Volume 455, Issues 1–3, December 2014
  • Alejandro Vargas-Uscategui, Edgar Mosquera, Juan M. López-Encarnación, Boris Chornik, Ram S. Katiyar, Luis Cifuentes, Characterization of rhenium compounds obtained by electrochemical synthesis after aging process, Journal of Solid State Chemistry, Volume 220, December 2014
  • Shuqi Guo, Formation of rhenium diboride via mechanochemical–annealing processing of Re and B, Journal of the European Ceramic Society, Volume 34, Issue 16, December 2014
  • V.Kh. Alimov, Y. Hatano, K. Sugiyama, M. Balden, M. Oyaidzu, S. Akamaru, K. Tada, H. Kurishita, T. Hayashi, M. Matsuyama, Surface morphology and deuterium retention in tungsten and tungsten–rhenium alloy exposed to low-energy, high flux D plasma, Journal of Nuclear Materials, Volume 454, Issues 1–3, November 2014
  • Victor V. Verpekin, Alexander A. Kondrasenko, Oleg S. Chudin, Alexander D. Vasiliev, Galina V. Burmakina, Nina I. Pavlenko, Anatoly I. Rubaylo, Chemistry of vinylidene complexes. XXIII. Binuclear rhenium–palladium vinylidene bridged complexes, their reactions with diiron nonacarbonyl, Journal of Organometallic Chemistry, Volume 770, 1 November 2014
  • M. Karthikeyan, Bala. Manimaran, One-pot synthesis of sulphur-bridged rhenium containing molecular cubanes: Spectroscopic and structural characterisation, Journal of Organometallic Chemistry, Volume 769, 15 October 2014
  • Anton A. Ivanov, Michael A. Shestopalov, Konstantin A. Brylev, Vadim K. Khlestkin, Yuri V. Mironov, A family of octahedral rhenium cluster complexes trans-[{Re6Q8}(PPh3)4X2] (Q = S or Se, X = Cl, Br or I): Preparation and halide-dependent luminescence properties, Polyhedron, Volume 81, 15 October 2014
  • Steven A. Chabolla, Edward A. Dellamary, Charles W. Machan, F. Akif Tezcan, Clifford P. Kubiak, Combined steric and electronic effects of positional substitution on dimethyl-bipyridine rhenium(I)tricarbonyl electrocatalysts for the reduction of CO2, Inorganica Chimica Acta, Volume 422, 1 October 2014
  • Junya Nakamura, Takahiro Kaneko, Takashi Hara, Kyosuke Yoshimi, Kouichi Maruyama, Hirokazu Katsui, Takashi Goto, Site-occupation behavior and solid-solution hardening effect of rhenium in Mo5SiB2, Intermetallics, Volume 53, October 2014

Rhenium Isotopes

Naturally occurring rhenium (Re) has two isotopes: 185Re (37.4%) and 187Re (62.6%) .

Nuclide Symbol Isotopic Mass Half-Life Nuclear Spin
185Re 184.9529550 Observationally Stable 5/2+
187Re 186.9557531 41.2(2)×109 a 5/2+