rare earth selected

The diffusion of oxygen in monocrystalline ScaO 3, YzO 3, Dy,O 2, HosO 3, Er 2 O 3, Tm 2 O 2, and Lu 2 O 3 was measured by a thermobalance technique. The reoxidation of partially reduced crystals of these materials was treated as a diffusion-controlled process with a moving boundary.

Preliminary Estimates of the Quantities of Rare-Earth Elements Contained in Selected Products and in Imports of Semimanufactured Products to the United States, 2010 . By Donald I. Bleiwas and Joseph Gambogi . Abstract . Rare-earth elements (REEs) are contained in a wide range of products of economic and strategic importance to the Nation.

Rare earth elements (REEs) are a group of metallic elements exhibiting similar physicochemical properties that includes scandium (Sc), yttrium (Y), ... Preliminary Estimates of the Quantities of Rare-Earth Elements Contained in Selected Products and in Imports of Semimanufactured Products to the United States, 2010. US Geological Survey …

The geochemical and mineralogical characteristics of pelagic sediments collected from the Interoceanmetal Joint Organization (IOM) claim area, located in the eastern part of the Clarion-Clipperton Fracture Zone (CCFZ; eastern tropical Pacific), are described in this paper. The concentrations of rare earth elements (REE), as well as …

Abstract. Rare-earth elements (REEs) are contained in a wide range of products of economic and strategic importance to the Nation. The REEs may or may not represent a significant component of that product by mass, value, or volume; however, in many cases, the embedded REEs are critical for the device's function.

WASHINGTON, D.C. — The U.S. Department of Energy (DOE) today awarded $19 million for 13 projects in traditionally fossil fuel-producing communities …

The rare-earth elements (REEs) and bismuth, being classified as the 'most critical raw materials' (European Raw Materials Initiatives, 2017), have a high economic importance to the EU combined ...

The rare earth elements (REE) are a set of seventeen metallic elements. These include the fifteen lanthanides on the periodic table plus scandium and yttrium. Rare earth elements are an essential part of many high-tech devices. The U.S. Geological Survey news release "Going Critical" explains:

US Critical Materials Corp. is a private rare-earth exploration and development company, based in Salt Lake City, Utah. With holdings in Montana and …

Statistics and information on the worldwide supply of, demand for, and flow of the mineral commodity group rare earths - scandium, yttrium, and the lanthanides. The principal economic sources of rare earths are the minerals bastnasite, monazite, and loparite …

In Nunavik (Northern Quebec, Canada), some mining projects are envisioned, that could increase the contamination of the environment by various chemicals, including rare earth elements (REEs), and implicitly Inuit population exposure. The objective of this study was to determine the baseline biological exposure of the population to these …

Rare earth elements (REE) include the lanthanide series elements (La, Ce, Pr, Nd, Pm, Sm, Eu, Gd, Tb, Dy, Ho, Er, Tm, Yb, and Lu) plus Sc and Y. Currently these …

This study investigates the chemical associations of the selected rare-earth elements (Sc, Y, Ce, La, and Nd) with major element phases in the postprocessed bauxite residues and compares them with the untreated bauxite residue. The treatment of bauxite residue considers our previous published process which involved the neutralization with …

Rare earth elements (REEs) have become increasingly important metals used in modern technology. Processes including mining, oil refining, discarding of obsolete equipment containing REEs, and the use of REE-containing phosphate fertilizers may increase the likelihood of environmental contamination. …

ABSTRACT The extraction of microquantities of Sc, La, Ce, Pr, Nd, Sm, Eu, Gd, Tb, Dy, Ho, Er, Tm, Yb, Lu, and Y from HNO3 solutions by selected diphosphine dioxides of various structures in dichlorethane has been studied. It has been found that the extraction of these elements decreases with an increase in the number of methylene …

Rare earth elements and other critical minerals and materials are key to manufacturing clean energy technologies here in America—such as solar panels, wind turbines, electric vehicles, and hydrogen fuel cells. ... Three projects were selected for negotiation to support the development of FEED studies for potential future intermediate- and/or ...

The RsGa3 phases for many of the lighter rare earth elements, specifically La, Nd, Sm, Gd, Tb and Dy, have been reported to have CrsB3-type structures, evidently all on the basis of powder diffraction evidence [2-5]. On the contrary, R5Ga3 phases with heavier and smaller R have been found (again according to powder data) to be MnsSi3 …

Rare earth metals had been utilized to enhance the creep resistance and high strength of copper alloys [82]. In the advance of environmentally friendly technologies, these type of metals have ...

Rare-earth elements (REEs) are used in a wealth of high-tech applications, including permanent magnets, lasers, phosphors, catalytic converters, and batteries 1,2,3,4, owing to their 4 f peculiar ...

The rare earths are of a group of 17 chemical elements, several of which are critical for the energy transition. Neodymium, praseodymium, dysprosium and terbium are key to the production of the permanent magnets used in electric vehicles (EVs) and wind turbines. Neodymium is the most important in volume terms.

Rare earths are used in the renewable energy technologies such as wind turbines, batteries, catalysts and electric cars. Current mining, processing and sustainability aspects have been described in this paper. Rare earth availability is undergoing a temporary decline due mainly to quotas being imposed by the Chinese government on …

Seven rare earth elements exerted different effects on sea urchin early life stages. • Embryo-, spermio- and mitotoxicity, and oxidative/ nitrosative stress were found. • Nominal vs. analytical REE concentrations were checked. • Comparative toxicities were evaluated for the different REE.

First, the Chinese State Reserve Bureau (SRB) began a rare earth stockpiling program in 2013. The rst stockpile purchase was in mid-2013 and the fi SRB paid a 10% premium for the stockpiled rare earths. In late-2014 it was reported that the government had built storage for more than 40 thousand tons of REOs and the SRB may …

RMO 3 perovskite oxides are often orthorhombically distorted from the ideal cubic crystal lattice and show temperature-dependent structural and magnetic phase transitions. RMO 3 containing rare earth and transition metal can exhibit interesting magnetic, structural, and transport properties. It is well known that their magnetic …

Press and General Inquiries: 202-287-5440 [email protected] WASHINGTON, D.C. — The U.S. Department of Energy (DOE) today announced $5 million in funding for three projects to evaluate the feasibility of extracting Rare Earth Elements (REEs) and Platinum Group Metals (PGMs) from macroalgae for use in energy …

Raman spectra of three readily available C-type stoichiometric rare-earth sesquioxide powders of composition Ln2O3 are presented. Some correlations of spectra with body-cell structure and infrared absorption spectra have been made. Spectra of Eu2O3, Dy2O3, and Tm2O3 display several new peaks that have not as yet been reported. Assignments of …

The rare earth content in selected minerals, including some bastnasites, is given in the table. Rare Earth Element Bastnasit (Mountain Pass, California) Bastnasit Monazit (Mount Weld, Australia) Xenozeit (Lehat, Malaysia) High-Y Laterite Loparit (Kola Peninsula, Russia) Rare earth content in selected minerals (%) La: 33.8: 23.0: 25.5: 1.2: 1.8:

Last Updated: April 4, 2023. On September 19, the U.S. Department of Energy (DOE) today announced up to $156 million in funding from President Biden's Bipartisan …

The rare earths are a relatively abundant group of 17 elements composed of scandium, yttrium, and the lanthanides. The elements range in crustal abundance from cerium, the 25th most abundant element of the 78 common elements in the Earth's crust at 60 parts per million, to thulium and lutetium, the least abundant rare-earth elements at about 0. ...

Rare earth elements (REE) include the lanthanide series elements (La, Ce, Pr, Nd, Pm, Sm, Eu, Gd, Tb, Dy, Ho, Er, Tm, Yb, and Lu) plus Sc and Y. Currently these metals have become very critical to several modern technologies ranging from cell phones and televisions to LED light bulbs and wind turbines. ... This waste residue as well as …

rare-earth element, any member of the group of chemical elements consisting of three elements in Group 3 ( scandium [Sc], yttrium [Y], and lanthanum [La]) and the first extended row of elements below …

Demand signals for rare earths are projected to rise as the world electrifies with machines that require highly specialized rare earth magnets. According to a report …

Rare earth elements (REE) include the lanthanide series elements (La, Ce, Pr, Nd, Pm, Sm, Eu, Gd, Tb, Dy, Ho, Er, Tm, Yb, and Lu) plus Sc and Y. Currently these metals have become very critical to ...

Project objectives are: 1) to fully establish a comprehensive and robust geologic and geochemical framework for the occurrence of volcanic-related beryllium …

The reactions of Pr 2 O 3 and Pr 6 O 11 with Cl 2 (g) were studied thermodynamically and experimentally, and proposed in the systems Pr 2 O 3 /Cl 2 (g) and Pr 6 O 11 /Cl 2 (g). A kinetic analysis was performed on Pr 6 O 11 chlorination, which differs from with other light rare earth oxide chlorinations. The praseodymium oxychlorides …

The main goal of this work was the evaluation of the effect of modification of zirconia by selected rare earth metals (praseodymium, yttrium and gadolinium) on the activity of nickel catalyst in the high temperature conversion of lignocellulosic biomass to hydrogen-rich gas. An influence of type of dopant, its content and introduction method ...

The hemispherical spectral emittances for the sesquioxides of yttrium, samarium, gadolinium, erbium, thulium, and ytterbium are given for five wavelengths in the visible portion of the spectrum over the range of 1400° to 3000°K.

The concentrations of rare earth elements (REE), as well as other selected critical elements contained in 135 sediment samples of siliceous clayey silts, are presented.

The diffusion of oxygen anions in single crystals of Y 2 O 3 and Er 2 O 3 was investigated by a thermobalance technique by Berard et al. [43], and D 0 and E a values for Y 2 O 3 and Er 2 O 3 are 6 ...

Rare-earth element - Minerals, Ores, Uses: The content of the individual rare-earth elements varies considerably from mineral to mineral and from deposit to deposit. The minerals and ores are generally classified as "light" or "heavy"; in the former group most of the elements present are the light-atomic-weight elements (i.e., lanthanum, cerium, …