Element Rhenium (Re), Group 7, Atomic Number 75, d-block, Mass 186.207. Sources, facts, uses, scarcity (SRI), podcasts, alchemical symbols, videos and images.Web
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A series of novel spironaphthoxazine-containing rhenium(I) tricarbonyl diimine complexes, which show interesting photoluminescence behavior involving intramolecular photosensitization, have been synthesized and …Web
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In the sodium aluminophosphate glasses, Re is present in both metallic Re(0) form and Re(VII). In the Sodium aluminum-iron phosphate glasses, regardless of the conditions of their production, all the Re occurred as Re(VII). Elemental leach rates from the Re-containing glasses were found to be lower than the standard values.Web
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Elemental rhenium has a hexagonal close-packed (hcp) metal crystal structure (space group—P6 3 /mmc, Mg type) with lattice parameters: a = 0.27615 nm, …Web
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1. Introduction. Rhenium has the characteristics of high melting point, good interface stability and cohesiveness [1], [2], [3], and can form alloys with most metals over a wide range of concentrations [4].In recent years, related works have studied the high temperature applications of various rhenium alloys, Xu [5], Dong [6] and Fu [7] et al. …Web
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Rhenium is one of the five major refractory metals (metals with very high resistance to heat and wear). The other refractory metals are tungsten, molybdenum, tantalum and niobium. Rhenium compounds include …Web
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Until quite recently, no mineral containing just rhenium as the only type of cation (in combination with a non-metallic element) had ever been found. As reported in 1994, …Web
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The as-deposited films exhibit a highly disordered atomic structure and superconductivity up ... Our early work has shown that it is possible to overcome this challenge by electrodepositing rhenium from a solution containing an ultra-high concentration of lithium chloride. 8 This type of solution is known as a water-in-salt …Web
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Naturally occurring rhenium is a mixture of two isotopes: 185 Re (natural abundance: 37.07%) and the 187 Re (natural abundance: 62.93%). 3 Although representing the main …Web
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Rhenium is one of the rarest elements in Earth's continental crust; its estimated average crustal abundance is less than 1 part per billion. Rhenium is a metal that has an extremely high melting point and a heat-stable crystalline structure. More than 80 percent of the rhenium consumed in the world is used in high-temperature superalloys, …Web
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equilibrium structure of rhenium-containing alloys, was modified . to give the version known as 'Super 5' [16]. The compositions of . the TCP phases for the ahoy RR2071 predicted using this .Web
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A series of sodium borosilicate glasses were synthesized with KReO 4 or Re 2 O 7, to 10,000 ppm (1 mass%) target Re, to assess effects of large concentrations of rhenium on glass structure and fto estimate solubility of 99 Tc, a radioactive component in low active waste nuclear glasses. Rhenium was used as a surrogate for 99 Tc for …Web
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consist of close-packed layers of relatively smaller atoms, such as nickel and chromium,with the largeratoms, such as rhenium, tungstenand tantalum, residing in 14,1.5 or 16 co-ordinated sites ...Web
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Single crystals of rhenium-containing ZhS32-VI, ZhS32U nickel superalloys with the 〈001〉, 〈011〉, and 〈111〉 crystallographic orientations have been produced by directional solidification. The alloying element segregations and the thermal stability of the microstructure consisting of a γ solid solution and hardened by precipitates of the γ′ …Web
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In this study, we synthesized several rhenium tricarbonyl complexes with tridentate ligands (L) having S or N as donor atoms, fac-[Re(CO)3L]X (X = Tf2N [= …Web
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Rhenium is a greyish silver metal. Rhenium has remarkably high boiling point (5627 and is categorized as the element with the highest boiling point. It also has one of the highest melting point (3170 ), second only to carbon and tungsten. Rhenium is a significantly dense metal (21.02 g/cm. Rhenium is not very reactive metal.Web
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The structure of molybdenum ions depends on pH values in the contacting solution 6, ... The sulphuric acid and nitric–sulphuric acid systems obtained after processing of rhenium-containing molybdenum concentrates were used for the anion exchangers testing under laboratory and industrial conditions 6, 9, 12.Web
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A series of sodium borosilicate glasses were synthesized with KReO 4 or Re 2 O 7, to 10,000 ppm (1 mass%) target Re, to assess effects of large concentrations of rhenium on glass structure and ...Web
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We focus attention on the difference between the dendrite structures of cobalt-free and rhenium-free VKNA-1V alloys and the VKNA-25 alloy containing these AEs. The dendrites of both alloys have a two-phase structure: the γ'-phase portions several micrometers in size are separated by interlayers of nickel-based γ-solid solution with …Web
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This special configuration bility of Re as Re7+ in sodium borosilicate glass is was designed to determine the solubility of rhenium in approximately 3000 parts per million (ppm) by this glass, as discussed elsewhere.15,16 This glass-making mass.15,16 Additionally, it was shown that above this process is uncommon for oxide glass synthesis, but ...Web
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1. Introduction. Nickel (Ni)-based single crystal (SC) superalloys are of unique structure consisting of a disordered solid solution γ-Ni matrix (face-centered cubic) and an ordered γ ′-Ni 3 Al (L1 2) precipitate.They are widely used in turbine blades of advanced aircraft engines [[1], [2], [3]], owing to their outstanding mechanical strength and, in …Web
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The composites consist of rhenium-containing nanoparticles stabilized by low-density polyethylene matrix. The structure of composites was characterized by means of TEM, EDS, XRD, EXAFS and EMR. Transmission electron microscope images illustrate that the rhenium-containing nanoparticles are 15.0 ± 0.3 nm in size.Web
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Nickel-based single-crystal superalloys are the key materials for the manufacturing and development of advanced aeroengines. Rhenium is a crucial alloying element in the advanced nickel-based single-crystal superalloys for its special strengthening effects. The addition of Re could effectively enhance the creep properties of the single …Web
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December 19, 2017 Rhenium is one of the rarest elements in Earth's continental crust; its estimated average crustal abundance is less than 1 part per billion. Rhenium is a metal …Web
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Re31 was the first reported phenanthridine-containing Re complex and also helped to induce multiple apoptotic pathways, which can be successfully exploited in chemotherapy (Fig. 21 and 22). 66. ... Fig. 28 Structure of rhenium complexes with the formula fac-[Re(et-isonic) (NN)(CO) 3] +.Web
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Abstract. The β − emitter, rhenium-188 ( 188 Re), has long been recognized as an attractive candidate for targeted cancer radionuclide therapy (TRNT). This transition metal shares chemical similarities with its congener element technetium, whose nuclear isomer technetium-99m ( 99m Tc) is the current workhorse of diagnostic nuclear medicine.Web
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Tetrametallic molecular rectangles have been synthesized by combining rhenium(I) thiolate dimers with difunctional pyridyl and pyrazyl type ligands. The proposed rectangular structures are supported by 1H NMR, MS, and IR absorption measurements. In addition, crystal structures of two of the rectangles are presented showing frameworks …Web
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It has been demonstrated that during heat treatment there was formation of a two-phase (α + β)-structure. In this case rhenium, as also chromium, vanadium, and molybdenum, is concentrated within β -phase. ... E. N. Kablov, "Physicochemical and production features of heat-resistant alloy creation containing rhenium," Vestn. Mosk. …Web
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In some embodiments films comprising rhenium nitride are deposited. The rhenium-containing thin films may be deposited by cyclic vapor deposition processes, for example using rhenium halide precursors. The rhenium-containing thin films may find use, for example, as 2D materials. ... Structures including metal carbide material, devices …Web
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Multiple bonds between transition metals and main-group elements. 73. Synthetic routes to rhenium(V) alkyl and rhenium(VII) alkylidyne complexes. X-ray crystal structures of (. eta. sup 5 -C sub 5 Me sub 5 )Re( double bond O)(CH sub 3 )(CH sub 2 C(CH sub 3 ) sub 3 ) and (. eta. sup 5 -C sub 5 Me sub 5 )(Br) sub 3 Re triple bond CC(CH sub 3 ) sub 3Web
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Polypyridyl coordinated rhenium(I) tricarbonyl complexes as model devices for cancer diagnosis and treatment. ... Synthesis and crystal structure of an iridium complex containing the novel electron-poor hybrid monoanionic ligand Ph 2 PCF 2 PO 2 (OiPr) Polyhedron, Volume 228, 2022, Article 116162.Web
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Rhenium is one of the rarest elements in Earth's continental crust; its estimated average crustal abundance is less than 1 part per billion. Rhenium is a metal that has an …Web
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Abstract The chemistry of the rhenium trihydrido complex [ReH3(PPh3)4] (1) has been reinvestigated. ... These studies date back to the 1960's and laid the foundation for all subsequent studies about rhenium polyhydrides containing phosphine co-ligands. 10, 25, 27 Exemplarily, ... Structure solutions and refinements were done with the SHELX ...Web
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the first examples of ionic liquids containing cationic rhenium complex es. Thermal analysis revealed that the S -coo rdinat ed complexes are thermally less stable than the N -coordinat edWeb
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Rhenium is one of the rarest elements in Earth's continental crust; its estimated average crustal abundance is less than 1 part per billion. Rhenium is a metal that has an extremely high melting point and a heat-stable crystalline structure. More than 80 percent of the rhenium consumed in the world is used in high-temperature superalloys, especially …Web
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