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Showing 1 to 20 of 77 for “"rare earth element"”.
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Rare earth element systematics in ancient and modem hydrothermal systems
… been investigated through a comparison of the rare earth element (REE) systematics of hydrothermal materials from the ore-forming hydrothermal systems of the TAG vent field, 26 N Mid-Atlantic Ridge, and 90 Myr Troodos Ophiolite, Cyprus. Ophiolites integrate a long (c. 20 Myr) history of …
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Silica Nanoparticle-Based Platform for Rare Earth Element Recovery and Separation
Rare earth elements (REEs) are essential for clean energy technologies including batteries for electrical vehicles, wind turbines and LED screens due to their unique magnetic, optical, and electronic properties. Efficient methods for their recovery and separation are urgently needed to meet the …
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Precipitation techniques and characterisation of rare earth element doped phosphor materials
… at the centre of this work. In the presence of rare earth element nitrates the hydroxycarbonate ligands form spherical phosphor precursor particles that after annealing yield the luminescent oxides. This is followed by the presentation of a novel synthetic method using a micellar phase of rare …
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Developing Materials for Rare-Earth–Element Chelation: Synthesis, Solution Thermodynamics, and Applications
Rare Earth Elements (REEs: La–Lu, Y, and Sc) are critical components for technological innovations, therefore more effective methods for the domestic extraction and purification of REEs are in ever-increasing demand. Metal-chelating polymers have great potential in these applications due to their …
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Selective electrochemical separation of cations for rare earth element recovery and water softening
Submission published under a 24 month embargo labeled 'U of I Access', the embargo will last until 2025-12-01
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Sr87/Sr86 ratios, K/Rb ratios, and rare-earth element abundances in pyroxene granulites.
… Institute of Technology, Dept. of Earth and Planetary Sciences, 1969.
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Low rare earth element concentration impact glass from the K/T Boundary at Beloc
… K/T boundary layer at Beloc that is depleted in rare earth elements (REE) relative to continental crust. It is widely agreed that a large bolide struck the Yucatan Peninsula roughly 65 Ma spreading a worldwide iridium anomaly. However, there is only one case of a piece of the impactor being found …
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Geochemical characteristics and rare earth element trends of the Upper Zone in the western Bushveld Complex
… of the magma in the magma chamber existed. Rare earth element distribution coefficients (calculated by the ratio of rare earth element content of apatite to rare earth element content of host matrix) indicates that the apatite in magnetite and apatite rich zones crystallized under conditions …
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Petrographic and strontium isotope analysis on rare earth element bearing minerals in Hicks Dome, Southern Illinois
Submission original under an indefinite embargo labeled 'Open Access'. The submission was exported from vireo on 2023-09-01 without embargo terms
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Mineralogical and ion-exchange leaching study of a Rare Earth Element (REE) bearing ion-adsorption clay deposit
Rare earth elements (REEs), La to Lu including Y, are vital elements in manufacture of catalysts and metallurgical industries, and play a critical role in meeting future energy demands, such as through their use in permanent magnets in wind turbines. China has dominated more than 90 % of the REE …
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Effects of Terrestrial Weathering on Rare Earth Element Concentrations and Sulfur Isotopic Signatures of Carbonaceous and Ordinary Chondrites
… when they encounter terrestrial conditions. Elemental concentrations and stable isotope analyses of chondrites, considered to be the most primordial material in the solar system, are two tools which help unlock the weathering patterns of these specimens when they enter the earth system. …
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Characterization of Uranium and Rare Earth Element Mobility and Attenuation Downstream of Decommissioned Tailings Impoundments at the Bicroft Mine near Bancroft, Ontario
Attenuation of uranium (U) and rare earth elements (REEs) has been observed in stream and wetland sediments, but the geochemical and mineralogical processes involved in sequestering these elements in natural systems are not well understood. The decommissioned Bicroft Uranium Mine near Bancroft, ON …
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The geochemistry of carbonate-hosted Pb-Zn-Ag mineralization in the Lavrion District, Attica, Greece: fluid inclusion, stable isotope, and rare earth element studies
… Post Archean Australian Shale (PAAS)-normalized rare earth and yttrium (REY) patterns of the Upper and Lower marbles, and calcite intergrown with sulfides show positive Eu and negative Ce anomalies as well as Y/Ho ratios between 40 and 80. Normalized REY patterns of fluorite also have positive Eu …
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Gough Island--evaluation of a fractional crystallization model and an experimental study of the partitioning of a rare earth element in the system diopside/water,
… Institute of Technology, Dept. of Earth and Planetary Science, 1972.
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The addition of a US Rare Earth Element (REE) supply-demand model improves the characterization and scope of the United States Department of Energy's effort to forecast US REE Supply and Demand
This paper presents the development of a new US Rare Earth Element (REE) Supply-Demand Model for the explicit forecast of US REE supply and demand in the 2010 to 2025 time period. In the 2010 Department of Energy (DOE) Critical Material Strategy (CMS) report, the DOE created a DOE REE Supply- …
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Detection of rare earth elements and rare earth oxides with hyperspectral spectroscopy
The continuously increasing demand for rare earth elements in technical components of modern technologies, brings the detection of new deposits closer into the focus of global exploration. One promising method to globally map important deposits might be remote sensing, since it has been used for a …
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Economic Potential of Rare Earth Elements Within Accessory Minerals of Granitic Pegmatite Mine Tailings
Rare Earth elements (REEs) are economically important due to their critical applications within multiple industries. This study investigates the Spruce Pine district of North Carolina, testing the economic feasibility of repurposing current mine waste tailings as a rare earth element resource. …
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Metal-insulator transition in yttrium- and neodymium-doped lanthanum nickelates
… superconductor, Sr₁₋ₓRₓCuO₂ (R = rare-earth element). Until recently, SC had not yet been found in any nickelates, including the isostructural infinite-layer RNiO₂. Recently, chemical reduction of RNiO₃/STO thin films (R =Nd₀.₈Sr₀.₂) using CaH₂ into the RNiO₂ infinite-layer phase …
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Geochemical Analysis of Mississippian Cherts and Devonian-Mississippian Novaculites, Southern Midcontinent Region
<p>This study uses trace elements and radiogenic isotopes (Pb, Sr, and Nd) to investigate the origin and mode of formation for the siliceous deposits in the Lower Mississippian Boone Formation and the Devonian-Mississippian Arkansas Novaculite in the southern midcontinent. Mississippi Valley-type …
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Two-dimensional and three-dimensional magnetism in ultrathin epitaxial rare-earth metal films
… of ultrathin epitaxial films of the heavy rare-earth elements; Gd, Er, and Dy, grown with the technique of Molecular Beam Epitaxy (MBE). By employing advanced film fabrication techniques, each magnetic rare-earth element layer, between 0.1 and 10 atomic layers thick and magnetically …
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