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  • Something about Actinium

    89 Ac Actinium. It naturally occurs from uranium decay, the half-life of its most stable isotope 227 is less than 22 years. It has very few applications, because it is difficult to handle and very dangerous. Chemically, it is similar to lanthanum. Most actinium decays to thorium, about 1.4% to francium .

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  • Rhenium Ring | AMERICAN ELEMENTS

    Rhenium is the fourth densest element exceeded only by platinum, iridium, and osmium. Rhenium''s high melting point is exceeded only by those of tungsten and carbon. Rhenium is found in small amounts in gadolinite and molybdenite. It is usually extracted from the flue dusts of molybdenum smelters. The name Rhenium originates from the Latin word ...

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  • Osmium - an overview | ScienceDirect Topics

    Rhenium– osmium arsenopyrite geochronology has been used to obtain a direct age of 1916 ± 19 Ma for gold-bearing arsenopyrites at Suurikuusikko (Geospec Consultants Limited, 2008). No age for rocks in the immediately adjacent area has been obtained, but comparing the Re–Os age to the stratigraphic ages quoted, mineralization took place 60 ...

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  • Rhenium

    Notable characteristics. Rhenium is a silvery white metal, lustrous, and has one of the highest melting points of all elements, exceeded by only tungsten and carbon. It is also one of the most dense, exceeded only by platinum, iridium and osmium. Rhenium has the widest range of oxidation states of any known element: -3, -1, +1, +2, +3,...

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  • Periodic Table of Elements: Los Alamos National Laboratory

    Annealed rhenium is very ductile, and can be bent, coiled, or rolled. Rhenium is used as an additive to tungsten and molybdenum-based alloys to impart useful properties. Uses. It is widely used as filaments for mass spectrographs and ion gauges. Rhenium-molybdenum alloys are superconductive at 10 K.

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  • Rhenium - McGill School Of Computer Science

    Rhenium (IPA: /ˈɹiːniəm/) is a chemical element in the periodic table that has the symbol Re and atomic number 75. A silvery-white, rare, heavy, polyvalent transition metal, rhenium resembles manganese chemically and is used in some alloys. Rhenium is obtained as a by-product of molybdenum refinement and rhenium-molybdenum alloys are superconducting. . This was the last naturally-occurring ...

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  • Rhenium fluoride - Revolvy

    Nov 28, 2016· Rhenium hexafluoride, also rhenium(VI) fluoride, (ReF) is a compound of rhenium and fluorine and one of the seventeen known binary hexafluorides . Synthesis Rhenium hexafluoride is made by combining rhenium heptafluoride with additional rhenium metal at 300 °C in a pressure vessel . Description Rhenium hexafluoride is a liquid at room temperature.

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  • Osmium - Academic Dictionaries and Encyclopedias

    Osmium has a blue-gray tint and is the densest stable element, slightly denser than iridium. [3] Calculations of density from the X-ray diffraction data may produce the most reliable data for these elements, giving a value of 22.562 ± 0.009 g/cm 3 for iridium versus 22.587 ± 0.009 g/cm 3 for osmium. [4] The high density of osmium is a consequence of the lanthanide contraction.

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  • GSA DATA REPOSITORY ITEM 2015157 RHENIUM .

    GSA DATA REPOSITORY ITEM 2015157 . RHENIUM-OSMIUM GEOCHRONOLOGY . Black carbonaceous shale from outcrop and drill core was sampled from the Callison Lake Formation, Mwashya subgroup (devoid of sulphide mineralization or evidence of fluid flow and from drill core), Taishir and Sheepbed formations. For outcrop

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  • Rhenium - Element information, properties and uses ...

    Rhenium was the lower one and indeed it was the last stable, non-radioactive, naturally-occurring element to be discovered. In 1905, Masataka Ogawa found it in the mineral thorianite from Sri Lanka. He realised from lines in its atomic spectrum that it contained an unknown element. ... iridium and osmium and it is one of the highest melting ...

    Osmium (album) - Wikipedia

    Osmium is the debut album of American funk band Parliament, led by George Clinton. The album has a psychedelic soul sound with a spirit of experimentation that is more similar to early Funkadelic than the later R&B -inspired Parliament albums.

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  • Rhenium - Elements Database

    Rhenium (atomic number 75, symbol Re) is a metal with a silvery-white color, high density, and high melting point. Only platinum, osmium, and iridium have higher densities than rhenium. It is a transition metal that is solid at room temperature and has similar chemical properties to .

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  • Rhenium Phosphide | AMERICAN ELEMENTS

    Rhenium is the fourth densest element exceeded only by platinum, iridium, and osmium. Rhenium''s high melting point is exceeded only by those of tungsten and carbon. Rhenium is found in small amounts in gadolinite and molybdenite. It is usually extracted from the flue dusts of molybdenum smelters. The name Rhenium originates from the Latin word ...

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  • Rhenium-osmium isotope and platinum-group element ...

    Rhenium-osmium isotope and platinum-group element constraints on the origin and evolution of the 1.27 Ga Muskox layered intrusion. Citation: Day, JMD, Pearson DG, Hulbert LJ. 2008. Rhenium-osmium isotope and platinum-group element constraints on the origin and evolution of the 1.27 Ga Muskox layered intrusion.

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  • Rhenium Alloys: Rhenium materials, manufacturing and products

    Rhenium is a heavy transition refractory metal with a melting point of 3,180°C and has the highest modulus of elasticity of all the refractory metals (420 GPa). Rhenium and rhenium containing alloys are unique with high melting points, high moduli of elasticity .

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  • Properties and Applications of Rhenium and Its Alloys

    12 TheAMMTIACQuarterly,Volume5,Number1 Rheniumbelongstoagroupofmetalsthataredifficulttoproduce byelectrolysisoftheiraqueoussolutions,mainlybecauseofitsvery

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  • Rhenium and Osmium Abundances in Stony Meteorites | Science

    Neutron activation measurements of rhenium and osmium abundances in the Orgueil, Mokoia, Karoonda, Mocs, and Hvittis chondrites indicate no fractionation of these elementsbetween the various chondrite types. The average abundances in chondritic material are RE = 60.3 X 10-9g/g and Os =710 X 10-9g/g (Os/ Re = 11.5). The rhenium abundance in the Bishopville enstatite achondrite is about .

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  • Rare Metals For Sale - Osmium, Ruthenium, Rhenium, Iridium ...

    Explore our diverse collection of rare and precious metals including PGMs such as osmium & ruthenium, rhenium, Rare Earths and many more. Own what''s rare!

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  • Radium - Wikipedia

    Radium is the heaviest known alkaline earth metal and is the only radioactive member of its group. Its physical and chemical properties most closely resemble its lighter congener barium. Pure radium is a volatile silvery-white metal, although its lighter congeners calcium, strontium, and barium have a .

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  • Osmium: geological information - Periodic table

    Osmium if found as the free element in iridiosmium, a naturally occurring alloy of iridium and osmium, and with platinum-bearing sands and ores. Abundances of osmium in various environments In this table of abundances, values are given in units of ppb (parts per billion; 1 billion = 10 9 ), both in terms of weight and in terms of numbers of atoms.

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  • Rhenium and Rhenium Alloys Supplier Worldwide - H. Cross

    Rhenium Alloys. In addition to pure rhenium H. Cross Company also produces a 50/50 (48% rhenium by analysis) rhenium molybdenum alloy that combines the strength of molybdenum and rhenium''s ductility. This product is available in all the same forms and sizes as pure rhenium at lower cost due to the lower rhenium percentage.

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  • Rhenium–osmium dating - Wikipedia

    Rhenium-Osmium dating is a form of radiometric dating based on the beta decay of the isotope 187 Re to 187 Os. This normally occurs with a half-life of 41.6 × 10 9 y, but studies using fully ionised 187 Re atoms have found that this can decrease to only 33 y.

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  • Rhenium - Wikipedia

    Rhenium is a chemical element wi the seembol Re an atomic nummer 75. It is a sillery-white, hivy, third-row transeetion metal in group 7 o the periodic table . Wi an estimatit average concentration o 1 pairt per billion (ppb), rhenium is ane o the rarest elements in the Yird''s crust .

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  • What Is The Cost Of Osmium? - YouTube

    Dec 06, 2017· G) of osmium is a chemical element with symbol os and atomic number 76. Los alamos national laboratory''s chemistry division; Jump up ^ live osmium pricesperiod, 6.

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  • Rhenium, chemický prvek Re, popis a vlastnosti

    Rhenium, chemický prvek Re. Popis, fyzikálnní a chemické vlastnosti, reakce prvku. Výskyt rhenia v přírodě, výroba práškového a kovového rhenia a jeho praktické využití.

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  • Rhenium-Osmium Isotope Constraints on the Age of Iron ...

    Rhenium and osmium concentrations and the osmium isotopic compositions of iron meteorites were determined by negative thermal ionization mass spectrometry. Data for the IIA iron meteorites define an isochron with an uncertainty of approximately ±31 million years for meteorites ∼4500 million years old. Although an absolute rheniumosmium closure age for this iron group cannot be as precisely ...

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  • Osmium - New World Encyclopedia

    Osmium is a transition metal that lies between rhenium and iridium in period 6 of the periodic table. It is thus a member of the platinum group of metals . In addition, it is located in group 8 (former group 8B), just below ruthenium .

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  • Hafnium - Wikipedia

    Hafnium is a chemical element with symbol Hf and atomic number 72. A lustrous, silvery gray, tetravalent transition metal, hafnium chemically resembles zirconium and is found in many zirconium minerals.

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  • Rhenium: The mineralogy of Rhenium

    Most widespread minerals containing Rhenium This list of minerals containing Rhenium is built from the mindat locality database. This is based on the number of localities entered for mineral species and is therefore slanted towards minerals interesting to collectors with less coverage of common rock-forming-minerals so it does not give an...

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  • ELEMENT: RHENIUM - Radiochemistry

    Rhenium is used as an additive to tungsten and molybdenum-based alloys to impart useful properties. Uses. It is widely used as filaments for mass spectrographs and ion gauges. Rhenium-molybdenum alloys are superconductive at 10 K. Rhenium is also used as an electrical contact material because it has good wear resistance and withstands arc ...

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  • periodic table rhenium

    periodic table rhenium. Periodic Table of Elements: Los Alamos National . The Chemistry Division''s Periodic Table describes the history, properties, resources, uses ... Rhenium does not occur free in nature or as a compound in a distinct ... Rhenium - Wikipedia. Rhenium is a chemical element with symbol Re and atomic number 75.

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