• Rhenium - Wikipedia

    Rhenium is a chemical element with the symbol Re and atomic number 75. It is a silvery-gray, heavy, third-row transition metal in group 7 of the periodic table. With an estimated average concentration of 1 part per billion (ppb), rhenium is one of the rarest elements in the Earth's crust. Rhenium has the third-highest melting point and second-highest boiling point of any stable element at 5903 ...

  • Pronunciation: /ˈriːniəm/ ​(REE-nee-əm)
  • Rhenium - 3D Elements

    Rhenium is a chemical element with symbol Re and atomic number 75. It is a silvery-white, heavy, third-row transition metal in group 7 of the periodic table.With an estimated average concentration of 1 part per billion (ppb), rhenium is one of the rarest elements in the Earth's crust.Rhenium has the third-highest melting point and second-highest boiling point of any element at 5903 K. Rhenium ...

  • What Is Rhenium And What Are Its Applications? -

    Characteristics of RheniumHow Many Stable Isotopes Does Rhenium have?Where Is Rhenium mined?How Is Rhenium Extracted from Molybdenite?Significant Applications of RheniumAlloysCatalystsOther ApplicationsRhenium is silvery white in color, and it has the third highest melting points after carbon and tungsten. Re is the fourth densest element on earth after Osmium, Iridium, and platinum. Rhenium comes with a hexagonal closely-packed crystal structure plus a lattice parameter of c=445.6pm and a=276.1pm. Commercially, Rhenium exists in powder form, but it can be consolidated by sintering and pressing it in a hydrogen or vacuum atmosphere. The consolidation process produces a small solid whose den...
  • Rhenium Extraction by Leaching in Ammonium Iodide Iodine

    The concentration of rhenium was only 32.6 ppm. This means that the dissolution of rhenium at ambient temperature is very slow. In order to obtain more practical information on the leaching behavior of rhenium, subsequent experiments were carried out at elevated temperatures, in an autoclave. Ammonium iodide was used in the leaching solutions. It is noted that the pH of ammonium solution

  • Rhenium in seawater: Confirmation of generally ...

    Rhenium in seawater: Confirmation of generally conservative behavior. A. D. Anbar, R. A. Creaser, D. A. Papanastassiou, G. J. Wasserburg. CLAS-NS: Earth and Space Exploration, School of (SESE) Research output: Contribution to journal › Article. 103 Scopus citations. Abstract. A depth profile of the concentration of Re was measured in the Pacific Ocean using a technique we have developed for ...

  • Influence of tungsten and rhenium concentration on creep ...

    A stress reduction of ∼6–12% can be achieved. (2) Intermediate Temperature (1253 K): The ratio of tungsten to rhenium concentration has to be kept constant in order to achieve similar creep strength. A sharp drop in creep strength is observed, if the Re concentration is lowered below 2.3 wt.%. This leads to the optimal concentrations of c Re =2.3 wt.% and c W =3.0 wt.%. (3) High ...

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  • Rhenium: Uses, History, Facts Isotopes Study

    Say Cheese!Rhenium DiscoveryRhenium PropertiesHave you ever seen an old camera? Imagine an old flashbulb. These bulbs only worked one time and then you had to throw them away. There is a fine wire inside the bulb, which could be made of several different metals, but was usually zirconium metal. Rhenium was used to ignite the lighter, making the flash go off. Let's learn more about rhenium!
  • Communication—A Mechanistic Study on

    Electrodeposition of rhenium-cobalt (Re-Co) alloys is investigated in water-in-salt electrolyte with a superhigh concentration of lithium chloride. Cyclic and linear sweep voltammetries ...

  • A first-principles model for anomalous segregation in ...

    Results of DFT calculations illustrated in figure 5(c) of show that in self-interstitial-dominated defective alloy structures, the mixing energies are positive and large, and the convex hull line is maximum at 300 meV/atom at the rhenium concentration of approximately 15 Re. Comparing this with the much lower mixing energies calculated in this work for the vacancy-dominated alloy structures ...

  • Measurements of rhenium isotopic composition in low ...

    Rhenium oxidation states range from −1 to +7, with the most abundant being +7, +6 and +4. 9 Rhenium is a soluble element in oxic conditions and mostly present in surface waters in the form of the oxyanion Re VII O 4 −. 1,2,10 In seawater, Re has a conservative behaviour with an average present-day concentration around 7.5 ppt. 2,3 Under anoxic conditions, Re VII is reduced to Re IV ...

  • Measurements of rhenium isotopic composition in low ...

    Rhenium oxidation states range from −1 to +7, with the most abundant being +7, +6 and +4. 9 Rhenium is a soluble element in oxic conditions and mostly present in surface waters in the form of the oxyanion Re VII O 4 −. 1,2,10 In seawater, Re has a conservative behaviour with an average present-day concentration around 7.5 ppt. 2,3 Under anoxic conditions, Re VII is reduced to Re IV ...

  • (PDF) Concentration of rhenium from dilute sodium

    The total sorbed amount of rhenium was 0.20 g/g of the resin. It was then eluted by the corresponding eluent in the concentration range up to about 3.0 mol dm-3. The highest elution efficiency and ...

  • Leaching kinetics, separation, and recovery of rhenium and ...

    Increasing aqua-regia concentration to 100% (v/v) resulted in more than 30% gain in recovery which can be attributed to the increased availability of leaching reagents. The leaching kinetics of rhenium from superalloy CMSX-4 in 100% aqua-regia solution fit into a chemical reaction controlled kinetics model for the first period of leaching. For the leaching period after 480 minutes, the ...

  • Rhenium Medical - Rhenium

    Rhenium Medical was established in September 2016, one of the leading diagnostics companies in Israel. Rhenium medical has a wide range diagnostics instruments and reagents from leading manufacturers around the world. Nevertheless, we are consistently searching for new technologies and new areas of expertise. Rhenium Medical has an outstanding Technical Service and Application

  • Rhenium (Re) - Properties, Applications

    Rhenium is a silvery-white metal, with one of the highest melting points of all metals. With an average concentration of 1 ppb, rhenium is one of the rarest elements in the Earth’s crust. It is usually available in powdered form, but it can be consolidated by pressing and sintering in the presence of vacuum or hydrogen. At room temperature and atmospheric pressure, the element is resistant ...

  • Rhenium-188: Availability from the 188W/188Re Generator ...

    Rhenium-188 is one of the most readily available generator derived and useful radionuclides for therapy emitting β- particles (2.12 MeV, 71.1% and 1.965 MeV, 25.6%) and imageable gammas (155 keV, 15.1%). The 188W/188Re generator is an ideal source for the long term (4-6 months) continuous availability of no carrier added (nca) 188Re suitable for the preparation of radiopharmaceuticals for ...

  • Electrodeposition of Superconducting Rhenium with

    Rhenium free electrolytes were also studied with linear sweep voltammetry to further understand the effects of LiCl salt concentration on the ion activity and side reactions. The morphology, crystallographic structures and superconductivity of the electrodeposited Re films were characterized. The hydration of LiCl resulted in a depletion of free water molecules and a decrease of proton ...

  • Rhenium chemical element Britannica

    Rhenium does not occur free in nature or as a compound in any distinct mineral; instead it is widely distributed in small amounts in other minerals, usually in concentrations averaging about 0.001 parts per million. Chile is the world leader in rhenium recovery, followed by the United States, Poland, Uzbekistan, and Kazakhstan.. Rhenium occurs up to about 20 parts per million in molybdenite ...

  • Liquid–liquid extraction of rhenium(VII) from an acidic ...

    The concentration effect of the extractant was investigated within the range of 0.0047 to 0.094 molL − 1 for Cyanex 923 diluted in distilled kerosene. Varying concentrations of solvent were contacted in the unit phase ratio with the aqueous solution containing 1.07 gL − 1 of rhenium in 2.0 molL − 1 of HCl. Rhenium extraction was found to increase from 4.9% to 97.8% over the studied ...

  • Rhenium in Molybdenite: a Database Approach to

    Rhenium concentration in molybdenite has a lognormal distribution and varies systematically with type of geologic system, intrusive lithology, and Mo grade. The lowest-Re molybdenite occurs in greisens (geometric mean 1 ppm ± a multiplicative standard deviation of 9), quartz vein-hosted W-Sn deposits (2 ± 5 ppm), unmineralized granites and granodiorites (12 ± 8 ppm), intrusion-related ...

  • Investigation of Rhenium‐Doped MoS2 Nanoparticles with ...

    The synthesis of rhenium‐doped fullerene‐like MoS 2 nanoparticles (Re:IF‐MoS 2) is described.Careful inductively coupled plasma mass spectrometry analysis reveals that the concentration of the rhenium atoms in the IF‐MoS 2 lattice is more than 10‐fold smaller than the weighted amount of this atom in the precursor powder. High resolution scanning transmission electron microscopy in ...

  • Rhenium, osmium and nitrogen uptake in Phaephyceae ...

    Despite rhenium (Re) and osmium (Os) having no known biological role, living macroalgae concentrate Re and Os. Moreover, macroalgae nitrogen isotopes (d15N) are a powerful tool for monitoring water eutrophication, sewage influence and pollution. This study utilizes Fucus sp., brown macroalgae (Phaephyceae) to assess, on the one hand, Re and Os localization and uptake in the macroalgae

  • Rhenium - Brief Profile - ECHA

    EC10 / LC10 or NOEC for marine sediment provides substance information on the substance’s effect concentration/lethal concentration for 10% of the model organisms feeding off the marine sediment or the no observed effect concentration for of the model organisms feeding off the marine sediment. . Values are generally displayed in measured in (nano/ micro/milli)gram per kilogram (dry weight).

  • Rhenium Disulfide and Rhenium-Doped MoS2 Thin Films

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  • Services - Rhenium

    Rhenium’s customer support is a central junction coordinating between customer needs and company’s operational supply chain and sales team. We are committed to deliver a high quality, professional and knowledgeable service to all our customers country-wide. This goal is achieved by our qualified and experienced customer support team, oriented to take care of our customers’ various needs ...

  • Chromatographic and electromigration analysis of

    For rhenium concentration up to approximately 10-5 mol/l, the molar excess of reduction agent over perrhenate is usually higher than 800 to reach the optimum yield of reduction and complexation (between 80-95%). Because of the potentially toxic effect of SnCl2 the reduction of perrhenate by stannous chloride was studied in detail to find the way for decreasing the concentration of reducing ...

  • Luminescent Rhenium(I) Polypyridine Complexes

    28/06/2011  Three luminescent rhenium(I) polypyridine complexes have been modified with an α‐ D ‐glucose moiety. Their biomolecular binding, bacterial staining, and cellular‐uptake properties have been examined (see figure). Various experimental results have indicated that glucose transporters play a very important role in the cellular uptake of these glucose complexes.

  • Preparation of ( 188 Re)rhenium sulfide suspension and its ...

    The reaction conditions such as the concentration ratio of Na2S2O3 to KReO4, heating time, ultrasonic time were optimized. The radiochemical yield of (188Re)Rhenium sulfide suspension is more than 96% and in vitro stability studies demonstrated that more than 99% of the 188Re remained in sulfide form over a 72 hrs period. The main particle size after various ultrasonic times is 1–5 μm ...

  • Recover Rhenium by Solvent Extraction

    Experimental results indicate that distribution ratio of rhenium increases sharply with increasing amine concentration. Effect of operating phase ratio on the distribution ratio of rhenium shows that as aqueous to organic ratio (A/O) increases from 1 to 15 , distribution ratio (DRe) decreases from 48 to 23, for extraction with 1% amine at a pH of 1.5.

  • Rhenium‐osmium isotope systematics and platinum group ...

    Secondly, at the concentration level of MORB nugget effects are nearly impossible to avoid. For instance, addition of a 15 μm PGE‐rich nugget with 30 wt% Os and a density of 10 g/cm 3 to 100 gram sample powder will lead to an increase Os concentration by ∼50 pg/g. If PGE‐rich trace phases are present in samples with low PGE contents ...

  • Selectivity in the 2-Propanol Reactions over Supported ...

    Rhenium-on-silica gel catalysts were prepared by standard techniques. The dehydrogenation-dehydration reactions of 2-propanol were chosen to study the selectivity exhibited by high and low rhenium concentration catalysts. High rhenium concentration catalysts behaved in a fashion typical of bulk rhenium metal—i.e., dehydrogenation predominated. On the other hand, low concentration

  • Rhenium ICP Standard - AccuStandard

    Rhenium ICP Standard. CAS# 7440-15-5. Catalog Number Cat. # ICP-45W-5. CRM RM. Certified Reference Material . Matrix. 1000 µg/mL in Water, tr Nitric acid. Number of Components Comps. 1. Unit. 500 mL. Price(USD) Price. $108.00. Compare. Email. Add to Cart Add. Additional Information. Concentration Conc. 1000 µg/mL. Storage Condition Storage. Ambient (>5 °C) Safety Data Sheet SDS. Login

  • Optimizing radionuclide sequestration in anion nanotraps ...

    Under the conditions of 10 ppm rhenium with a V/m of 1000 mL g-1, the K d values were calculated and found to equal 1.13 × 10 6 (8.82 ppb), 5.44 × 10 5 (18.35 ppb), and 1.00 × 10 7 (1.00 ppb ...

  • Rhenium‐osmium isotope systematics and platinum group ...

    22/10/2001  Given an average Os concentration of 31 pg/g, this ratio corresponds to a Re concentration of 198 pg/g, half the value of 400 pg Re/g estimated by Esser and Turekian . Improving our understanding of the average Re concentration in the continental crust is a challenging task because it requires properly accounting for the volumetric proportions of a trace lithology in the crust:

  • Separation of tungsten and rhenium on alumina in

    01/08/2007  Initial concentrations of tungsten and rhenium used in the experiments Series A B CW, mmol/l 16.6 5.4 CRe, mmol/l 5.4.10â 1 5.4 CW/CRe 30.7 1.0 as the point at which the concentration of the corresponding element in the effluent solution reaches 5% of its concentration in the influent solution. The exhaustion point of the column could, theoretically, be achieved either after infinite time

  • Rhenium-188: Availability from the 188W/188Re Generator ...

    Rhenium-188 is one of the most readily available generator derived and useful radionuclides for therapy emitting β- particles (2.12 MeV, 71.1% and 1.965 MeV, 25.6%) and imageable gammas (155 keV, 15.1%). The 188W/188Re generator is an ideal source for the long term (4-6 months) continuous availability of no carrier added (nca) 188Re suitable for the preparation of radiopharmaceuticals for ...

  • 5190-8507 Agilent

    Please login to add product to your favorites. Single Element Standards Part Number : 5190-8507. Rhenium (Re) standard, 1,000 µg/mL, in 5% HNO3, 100 mL Add to Favorites + Create New list Item successfully added to your list List Price: $90.75. Add to cart Please enter valid quantity. Specifications UNSPSC Code: 41113000; Volume: 100 mL; Standard Type: Rhenium (Re) Chemical Type:

  • Rhenium-osmium concentration and isotope systematics

    Rhenium and osmium abundances, and osmium isotopic compositions were measured by negative thermal ionization mass spectrometry in thirty samples, including replicates, of five IIA and eight IIB iron meteorites. Log plots of Os vs. Re abundances for IIA and IIB irons describe straight lines that approximately converge on Lombard, which has the lowest Re and Os abundances and highest

  • Phytoextraction of rhenium by lucerne (Medicago sativa ...

    Rhenium (Re) is one of the rarest metals in the Earth's crust and one of the most expensive metals of strategic significance in the world market. A CFA at the Jungar Thermal Power Plant, Inner Mongolia, China, contains more Re than two alkaline soils in the surrounding region. Pot experiments were undertaken to grow lucerne (Medicago sativa) and erect milkvetch (Astragalus adsurgens) in a ...

  • ‘Each scientist must stand up, at all costs, for the truth ...

    1 小时前  Login; Register; Subscribe; GO. Share on twitter ; Share on facebook; Share on whatsapp ‘Each scientist must stand up, at all costs, for the truth’ It is those who commit research misconduct – not those who expose them – that damage science, according to David Sanders. But while the biologist has embraced the role of data detective thrust upon him, he wishes more scientists would share ...