Rhenium (Re) is a rare metal (whose average concentration in the Earth's crust is in the order of 1 part per billion) valued for its extremely high melting point. Rhenium is produced by Chile, The Netherlands, Germany, Kazakhstan, the United Kingdom, Poland and the United States; yearly production in 2011 was 49 t [1]. The major consumer of ...

(a) Rhenium concentrations (x-axis is a log scale) in all eight samples, highlighting the large amount of Re (40 ppb) in the magnetiterich separate, compared with the rest of the lavas (all <1 ppb).

Rhenium concentration in equilibrium with the K–feldspar–muscovite–quartz and Re–ReO2 assemblages/ReS2 in KCl solutions. A Results at 400°C unless otherwise labeled; B results at 450°C ...

Rhenium concentration in Australian molybdenites by stable isotope Abstract A method for the determination of rhenium in molybdenite is described for concentrations down to 10 −7 g/g. Separation of microgram quantities of rhenium from molybdenite is effected by a pyridine solvent extraction and the rhenium concentration determined by stable ...

There was good agreement between the rhenium concentrations in a standard measured in this work with results from previous studies. The limit of detection was 0.11 ng kg⁻¹ for a sample volume ...

Rhenium concentration in equilibrium with the K–feldspar–muscovite–quartz and Re–ReO 2 assemblages/ReS 2 in KCl solutions. A Results at 400 u C unless otherwise labeled; B results at 450 u ...

Rhenium. Rhenium is a chemical element with 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 ...

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 ...

Rhenium concentrations were then measured with a Neptune MC ICP-MS at Durham University. Dissolved Re Yield Calculations. Several methods can be used to determine dissolved ion yields depending on the number of paired water discharge (Q) and concentration measurements, their frequency, and the behavior of the element of …

The final content was 26.1–27.3 g/l and 0.35–0.41 g/l for Re and Mo, respectively. Rhenium was concentrated on the second step up to 18–19 times and in comparison with the initial solutions—up to 366–380 times. The pure perrhenate ammonium salt was recovered from the second eluate by crystallization.

Although the DO concentrations vary significantly (2–14 mg/L), the rhenium concentrations of the Chilika show no statistically significant correlation with the DO content (r = −0.17; n = 17). This observation indicates that the redox state of the water column has a limited effect on the observed Re removal from the Chilika waters ( Fig. 4 ).

where C 0 is rhenium concentration in the initial solution (mg/dm 3); C i is rhenium concentration in i-th effluent portion (g/dm 3 ); t is time (h), K YN is the rate constant (1/h), and τ is the ...

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 …

Super-enrichment and recovery of associated Rhenium (Re) in sandstone-type uranium deposits is challenging due to its sparse distribution and ultra-low contents in raw ores. Conventional industrial processes are extremely difficult to achieve economic recovery of Re with a concentration below 0.1 mg/L from in-situ leaching solutions of …

Rhenium-188 (188Re) is a high energy beta-emitting radioisotope with a short 16.9 h physical half-life, which has been shown to be a very attractive candidate for use in therapeutic nuclear medicine.

Samples collected for this study from the: (a) Erlenbach, Switzerland; (b) Vogelbach, Switzerland; and (c) the East River, Colorado, USA. In all panels, water discharge record is shown in gray and the symbols show measured dissolved rhenium concentration, [Re] pmol L −1, with whiskers showing the analytical uncertainty.

The effects of biosorption experimental parameters such as solution pH (2.0–6.0), rhenium concentration (10–100 mg/L), time of interaction (5–120 min), and temperature (20–50 °C) have ...

Rhenium concentrations vary by nearly two orders of magnitude from 51 to 3588 pg/g, with an average/median value of 367/110 pg/g. Loess sample LO94 from Svalbard, characterized by high Os …

dissolved rhenium concentration, [Re] pmol L −1, with whiskers showing the analytical uncertainty. W ater Resources Resear ch. HILTON ET AL. 10.1029/2021WR029844. 5 of 18.

Our calculations indicate that rhenium concentrations in the sulfide stability field, even close the HS-/ boundary, are very low (~10-6 to ~10-5 ppm) in the temperature range from 100° to 200°C.

DOI: 10.1016/S0921-5093(01)01063-2 Corpus ID: 136623659; Influence of tungsten and rhenium concentration on creep properties of a second generation superalloy @article{Wllmer2001InfluenceOT, title={Influence of tungsten and rhenium concentration on creep properties of a second generation superalloy}, author={Silke …

1. Introduction. Rhenium (Re) has widespread application in today's rapidly developing fields of high-technology industry, such as electronics, petrochemical, metallurgical industry and especially aerospace fields, due to its unique physical and chemical properties [1].In nature, Re mostly exists as associated elements in the …

Description. Rhenium (element #75, symbol Re) is a rare, silvery-white metallic element. Rhenium is found as a trace element in platinum ores and in the mineral columbite. It is very dense and has a melting temperature …

IR Halogen Lamps QUARTZ INFRARED HALOGEN LAMPS Rhenium Alloys manufactures tubular double-ended (T-Style) infrared (IR) Quartz Halogen Lamps. Our primary IR Halogen Lamps are used in the semiconductor industry as a heat source in epitaxial processing of silicon wafers. Our lamps are qualified and approved by leading semiconductor …

In current technology, rhenium is recovered from the roaster gases produced during the oxidation of molybdenite concentrates. The gases are scrubbed and the dilute …

The concentration of molybdenum and rhenium entering the solvent extraction circuit was 12 to 18 g/l molybdenum and 25 to 40 ppm rhenium. The strip …

One or two gram aliquots of twelve reference materials with low platinum-group element (PGE) abundances (Ir concentrations ranging from 30 to 510 pg g-1) were analysed by isotope dilution ICP-MS us...

[1] We investigate the use of loess as a proxy for the concentration and isotopic composition of highly siderophile elements, specifically Os, in the upper continental crust. The 187 Os/ 188 Os, platinum group element, and Re concentrations of 16 loess samples from China, Europe, and South America, previously analyzed for major, trace …

As a result, the rhenium concentration in films is lower at higher Mo(CO) 6 flow. XPS investigation results suggest that for rhenium-doped films, Re and Mo atoms are found in chemical states …

Rhenium is added (i.e., increased rhenium from 0 to 1 wt % with interval of 0.25 wt %) to a conventional tungsten heavy alloy while maintaining a constant Ni: Cu (7:3) ratio. The samples were prepared using a vacuum hot press sintering method with parameters including 50 MPa pressure, 10 °C/min heating rate, and 1450 °C temperature …