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 …

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:

The "rare" in "rare earth elements" refers not to the quantity available but rather to their wide dispersion—it's hard to find an economically meaningful quantity in a …

Numerous attentions are paid towards the rare-earth: metals, oxides, hydroxides, chalcogenides, and its composites are used as an electrode material for supercapacitors. Hence, the purpose of this review is to discuss about the recent progress, development, challenges, strategies to optimize and future outlook towards the rare …

Abstract. Empirical Gupta-type potentials based on the second-moment approximation of tight-binding model have been developed for five hexagonal-closed-packed (hcp) rare earth metals: Er, Dy, Gd, Tb, Lu. The potentials can reproduce experimental cohesive energies, lattice constants and elastic constants of Er, Dy, Gd, Tb …

1. Introduction. Luminescent rare earth complexes have attracted considerable attentions owing to their excellent luminescence characteristics, i.e., high luminous intensity, long luminous lifetime and extremely sharp emission bands (good color purity) from the electronic transitions between the 4f energy levels.

another attractive rare earth hydride system have drawn a lot of attentions from the predictions 6–8 and experimental realization 9–12 of superconductivity. The experiments reported the I4/mmm-YH

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. ...

The 17 rare earth elements are: lanthanum (La), cerium (Ce), praseodymium (Pr), neodymium (Nd), promethium (Pm), samarium (Sm), europium (Eu), gadolinium (Gd), terbium (Tb), dysprosium (Dy), holmium (Ho), erbium (Er), thulium (Tm), ytterbium (Yb), lutetium (Lu), scandium (Sc), and yttrium (Y). Scandium and yttrium are …

The basic research was reviewed about the weathered crust elution-deposited rare earth ore for over forty years,including the causes and the characteristics of the deposit,the compositions and properties of rare earth ore,the relationship between rare earth ore and clay mineral as well as the theory of the adsorption and migration of rare earth in the …

Rare earth elements have attracted considerable attentions in electrocatalytic studies of DMFC, owing to their particular physical and chemical properties that result from the ... RE atomic ratio of 1:1:0.3 were prepared. In a typical process, rare earth (III) chlorides (Shanghai Chemical Reagent Co., China) were dissolved in ultrapure water ...

19 July 2023. The global fight for critical minerals is costly and damaging. Elements such as rare-earth metals are crucial for the clean-energy transition. Sustainability, equity and …

Elements such as rare-earth metals are crucial for the clean-energy transition. Sustainability, equity and security are all at risk in the rush to break China's dominance over their production.

The rare-earth nickelates, with formula RNiO 3, are a prominent example of a family of compounds displaying (with the notable exception of LaNiO 3) a metal–insulator transition as temperature is ...

Peak Rare Earths seals Ngualla supply agreement with China's Shenghe subsidiary. Australia-based Peak Rare Earths stock price surged 6% on the ASX, to close at A$0.52, following an announcement it had struck a long-term offtake agreement for its Ngualla rare earth project in Tanzania.

This motives rare metals to have a special issue focusing on PMMs. This special issue publishes 2 reviews and 11 research articles on both experimental and theoretical sides. The articles in this issue are selected from the proceedings of 2018 Rare Earth Permanent Magnets and Advanced Magnetic Materials and Their Applications …

Therefore, many efforts have been made to design and develop novel fluorescent probes that emit in the NIR-II window, including rare-earth (RE)-doped NPs [15–18], quantum dots (QDs) [19–22], organic fluorescent NPs [23–26] and single-walled carbon nanotubes (SWCNTs) [27–30]. Indeed, many of these probes have shown great …

Pt-rare earth catalysts are highly efficient novel electrocatalyst for oxygen reduction reaction (ORR) in proton exchange membrane fuel cells (PEMFCs) due to their high stability and activity. In this study, we prepare Pt-YO x /C catalysts using the traditional wet chemical reduction method. The optimal quantity of Y-oxides loaded onto the Pt/C ...

China has a strong position in critical mineral mining and a dominant position in processing and manufacturing. China accounts for 85-90% of global rare earth element mine-to-metal refining and refines 68% of the world's cobalt, 65% of nickel, and 60% of lithium of the grade needed for electric vehicle batteries.

Synergistic effects of two kinds of rare earth oxides (REOs), samarium oxide (Sm2O3) or lanthanum oxide (La2O3) on the intumescent flame retardancy of Nylon 1010/ethylene-vinyl-acetate rubber (EVM) thermoplastic elastomers (TPE) were studied systemically. The limiting oxygen index (LOI) of intumescence flame retardant (IFR)-TPE …

Rare earth elements (REEs) are generally referred to the elements with atomic numbers ranging from 57 (lanthanum) to 71 (lutetium) ... and human blood indicates that the potential health impacts of long-term exposure to REEs should be given sufficient attentions for not only the REE processing workers, but also the local residents living …

Rare earth ions Eu3+ and Tb3+ are doped into CsPbBr 3 nanocrystals (NCs) for ... Lead halide perovskites have attracted worldwide attentions due to their outstanding photophysics and optoelectronic

For example, unlike semiconductor quantum dots whose fluorescent emissions are closely related with the particle size, the emissions of rare-earth doped UCNPs are less affected. 14 In addition, the electronic configuration of RE elements (rare-earth ions) is [Xe]4f n 5s 2 5p 6 (n = 0–14), which indicates that the 4f electrons are greatly ...

Among these UCNPs, the rare-earth doped UCNPs have attracted considerable attentions due to their unique physiochemical properties.

etc. Among these UCNPs, the rare-earth doped UCNPs have attracted considerable attentions due to their unique physi-ochemical properties. For example, unlike semiconductor quantum dots whose fluorescent emissions are closely related with the particle size, the emissions of rare-earth doped UCNPs are less affected.[14]

The discovery of infinite layer nickelate superconductor marks the new era in the field of superconductivity. In the rare-earth (Re) nickelates ReNiO2, although the Ni is also of d9 electronic configuration, analogous to Cu d9 in cuprates, whether electronic structures in infinite-layer nickelate are the same as cuprate and possess the single band …

The raw materials—minerals and metals—that are necessary for renewable energy, clean technology, and our transition to a more sustainable, low-carbon future are often referred to as critical minerals. The term "critical minerals" is the most common terminology, and it is often used interchangeably with the terms "strategic minerals ...

How rare earth elements' hidden properties make modern technology possible. These 17 metals fine-tune light and generate powerful magnetic fields. In August, China finished constructing a maglev ...

The Journal of Rare Earths reports studies on the 17 rare earth elements. It is a unique English-language learned journal that publishes works on various aspects of basic theory and applied science in the field of rare earths (RE). The journal accepts original high-quality original research papers and review articles with inventive content, and ...

Results: Here, we develop a facile strategy for the fabrication of Nd 3+-doped rare-earth core-shell nanoparticles (Nd-RENPs), NaGdF 4:5%Nd@NaLuF 4, with strong emission in the NIR-II window. What's more, the Nd-RENPs could be quickly eliminated from the hepatobiliary pathway, reducing the potential risk with the long-term …

Called rare earths, these 17 elements are crucial to nearly all modern electronics. And demand for these metals has been skyrocketing. Fifteen rare earths make up a whole row on most periodic …

Abstract: Rare-earth doped semiconductors have attracted continuous attentions for their potential applications in both scientific research and practical fields. It is well-known that the luminescence efficiency of dopant emissions could be highly improved with a wide bandgap host material. As a highly thermally and chemically stable wide …

Wet chemical methods can provide low synthesis temperatures, good crystal structures, and excellent luminescence properties. However, there has been little research on its structure or the preparation of rare-earth-doped NaSrPO 4 by wet chemical methods [32,33,34], especially in Dy 3+-doped NaSrPO 4 white-emitting phosphors .

In parallel, yttrium hydrides as another attractive rare earth hydride system have drawn a lot of attentions from the predictions6–8 and experimental realization9–12 of. P63/mmc …

Introduction. Recent discovery of superconductivity in boron doped diamond [1], [2] as well as in layered rare-earth graphites with their high T c 's surpassing 10 K [3] has been gathering lots of attentions from the scientific communities. Historically, superconductivity in carbon was first found in graphite intercalation compounds.