Rhenium

The usual commercial form of the element is powder, but it can be consolidated by pressing and resistance-sintering in a vacuum or Sources of rhenium Commercial rhenium is obtained from Uses of rhenium Rhenium had good wear resistance and can withstand corrosion. Therefore, it’s commonly used as an electrical contact material. Rhenium wire is used in flash photography. It is used in hydrogenation of fine chemicals and as an additive to tungsten and molybdenum-based alloys. (Source: For the science geek in everyone, Live Science offers a fascinating window into the natural and technological world, delivering comprehensive and compelling news and analysis on everything from dinosaur discoveries, archaeological finds and amazing animals to health, innovation and wearable technology. We aim to empower and inspire our readers with the tools needed to understand the world and appreciate its everyday awe.

Rhenium (Re) 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 and excellent high temperature mechanical properties. The most common rhenium containing alloys are molybdenum 41% rhenium (Mo41%Re) and molybdenum 47.5% rhenium (Mo-47.5%Re). Rhenium (symbol Re), discovered in 1925 by German scientists Ida and Walter Noddack, is one of the last naturally occurring elements to be identified. Rhenium has a uniquely high melting point (3,180°C) and high density (21.04 g/cc). Products from rhenium can be thermally cycled thousands of times with no effects. Rhenium Powder Rhenium Alloys is a global leader in providing Rhenium chemicals required by manufacturers for critical parts and components. They are widely used in the production of high density, high temperature parts for aerospace, defense, energy and X-ray device industries. We supply three standard powders, Rhenium, Rhenium Powder is available with a choice of purity grades, 99.99% and 99.9% pure. Mesh sizes include -200, -325 and -635 mesh. Custom sizes available on request. Rhenium PELLETS (Rhenium Melting Stock) We’re uniquely able to convert ammonium perrhenate, or virtually any form of rhenium-bearing material, into pellets. Rhenium pellets are offered in two purity grades, 99.99% and 99.9% pure on a metals bas...

2. This gray to black crystalline 2 Re 2O 7 + 3 Re → 7 ReO 2 Single crystals are obtained by 2O 7 can also be reduced with 3 is similar to that of 3), without the large A cation at the centre of the unit cell. Each rhenium center is surrounded by an 2O 7 consists of alternating octahedral and tetrahedral Re centres. Upon heating, the polymer 2O 7. This molecular species closely resembles 4 tetrahedra that share a vertex, i.e., O 3Re–O–ReO 3. Other [ ] Rhenium disulfide is a 2. It has a layered structure where atoms are strongly bonded within each layer. The layers are held together by weak 2 was isolated down to monolayers which is only one unit cell in thickness for the first time in 2014. 2 is found in nature as the mineral Re + 2 S → ReS 2 Re 2S 7 → 2 ReS 2 + 3 S Rhenium diselenide (ReSe 2) also has a layered structure, although, contrary to the other dichalcogenides, rhenium ditelluride does not. 4 − and 2S in 4N Perrhenates [ ] 4 The perrhenate ion is the ReO − 4, or a compound containing this ion. The perrhenate anion is tetrahedral, being similar in size and shape to ReO − 4), but at high pH mesoperrhenate ( ReO 3− 5) forms. Perrhenate, like its conjugate acid 0 configuration. Solid perrhenate salts takes on the color of the cation. Halides [ ] Rhenium can form at least four flourides, of which 7, The most common rhenium chlorides are ReCl 6, 5, ReCl 4, and 3. 2Cl 8] 2− feature a 0 Re(VII) derivative 3 or sometimes written as Re 3Cl 9), is a dark-red hygroscopic sol...

From Goodfellow Jun 27 2002 When Mendeleev developed the periodic table back in 1969, not all the elements were known. He left gaps to accommodate these materials which were subsequently discovered. One such element is Rhenium (Re) whose discovery was attributed to Tacke, Noddack and Berg in 1925. Looking for some of the missing elements they were able to detect it in platinum ores. It was also found in minerals such as gadolinite and molybdenite. The name rhenium was derived from the Rhine River, which the discoverers named the element after. Occurrence Rhenium metal is not found as such in nature, nor do its compounds exist in as distinct minerals. It is a rare material found widely scattered throughout the earths crust. Natural rhenium is composed of two isotopes, while a further 16 unstable isotopes are also known. Production Commercially, rhenium is obtained as a by-product of copper smelting from molybdenum bearing copper ores. In this operation, the molybdenite roaster flue dusts from roasting of the copper ore are separated out. The rhenium is liberated from the molybdenite via high temperature roasting and is often converted and sold as the ammonium salt, ammonium perrhenate (APR), from which it may be further purified. Purification would involve reduction by hydrogen at high temperatures, yielding rhenium powder, which can be fabricated into shapes using powder metallurgical processes. Commercial operations producing rhenium in this way can be found in Miami, Ari...

What is rhenium (186Re) obisbemeda? rhenium (186Re) obisbemeda is our lead drug candidate designed for the treatment of recurrent glioblastoma (GBM), leptomeningeal metastases (LM), and pediatric brain cancers (PBCs), such as ependymoma and high-grade glioma. In preclinical and clinical trials of rhenium (186Re) obisbemeda for treating GBM, ReSPECT-GBM, we delivered up to 20x the absorbed dose of radiation versus standard external beam radiation therapy (EBRT), successfully reducing tumors without significant toxicity. In a preclinical trial of rhenium (186Re) obisbemeda for treating LM, ReSPECT-LM, we administered highly elevated doses of rhenium (186Re) obisbemeda with no maximum tolerable dose reached. View our ReSPECT Clinical Trials Our novel approach involves drug loading using a specially developed small molecule known as BMEDA with the radioisotope, Rhenium-186, and carrying it into the interior of a nanoliposome where it is irreversibly trapped. Upon administration, Rhenium-186 emits beta energy that precisely targets rapidly dividing cancer cells, sparing the surrounding healthy cells and tissue, as well as gamma energy that allows us to live image the full treatment infusion. rhenium (186Re) obisbemeda is injected in and near the tumor via a direct infusion using a Convection Enhanced Delivery (CED) catheter or an Ommaya reservoir. Rhenium-186 emits beta energy with a short average tissue penetration length of approximately 2 mm, localizing the attack to the tum...

With a melting point of 5,756 degrees Fahrenheit and a heat-stable crystalline structure, rhenium is extremely resistant to both heat and wear. This durability makes it a vital element in superalloys used in jet and industrial gas turbine engines. "The high-temperature properties of rhenium allow turbine engines to be designed with finer tolerances and operate at temperatures higher than those of engines constructed with other materials," the United States Geological Survey penned in an informational sheet on rhenium. "These properties allow prolonged engine life, increased engine performance, and enhanced operating efficiency." While these performance enhancing properties make rhenium a vital ingredient to modern transportation, its extreme scarcity helps boost it onto the list of 35 elements critical to the United States. According to the USGS, the average rhenium abundance in the earths crust is less than one part per billion, making it one of the rarest elements on the periodic table. While extremely rare, economically viable concentrations of rhenium are often found associated with porphyry copper-molybdenum deposits and one such deposit in Alaska encompasses more rhenium than has been used globally for the past four decades. Turbines drive demand Roughly 49,000 kilograms, or 49 metric tons, of rhenium was produced from mines around the world during 2018. Roughly 51,000 kilograms, or 51 metric tons, of this high-temp critical metal was used in the United States during...

The Amazing Uses Of Rhenium 1. The Use of Rhenium As a C atalyst One of the important uses of rhenium is as a catalyst in the petrochemical industry because rhenium and its compounds have excellent catalytic activity. At present, the consumption of rhenium in this field in the world accounts for more than 60% of its total consumption. 2. The Use of Rhenium in the National Defense and Aerospace Industry Rhenium is one of the most refractory metals. Its melting point is 3180℃, second only to 3410℃ of rhenium alloy 3. The Use of Rhenium in the Field of Heating Elements & High-temperature Measurement Thermocouples made of Re3-W and Re25-W alloy wires have a good linear relationship between temperature and thermo-electromotive force, accurate temperature measurement, and a wide measurement range (0-2485℃). Heating elements made of rhenium-based alloys last 5-10 times longer than those made of tungsten or 4. The Use of Rhenium in the Electronics Industry Alloys or coating materials composed of rhenium and tungsten, molybdenum, or platinum group metals are widely used in the electronics industry because of their high melting point, high resistance, strong magnetism, and good stability to the environment. 5. The Use of Rhenium in Coating and Welding Materials Rhenium can be used as a coating b ecause it features a high melting point, corrosion resistance, and wear resistance. For example, rhenium-coated metal wires, sheets, or tubes can achieve the purpose of preventing acid, alka...