Rare earth zirconates nanostructures have been introduced as remarkable, effective and promising type of heterogeneous photocatalyst due to their great photoreactivity and long-term stability, in the recent times [121,124,145,146]. It has been reported that the photocatalytic performance of the Ln2Zr2O7 structures are largely dependent on their ...

Ultrafast control of the magnetization in ps timescales by fs laser pulses offers an attractive avenue for applications such as fast magnetic devices for logic and memory. However, ultrafast helicity-independent all-optical switching (HI-AOS) of the magnetization has thus far only been observed in Gd-based, ferrimagnetic amorphous …

All rare-earth zirconates investigated here showed nearly identical thermal conductivities, all of which were ∼30% lower than the thermal conductivity of 7YSZ in the temperature range 25°–700°C. This finding is discussed qualitatively with reference to thermal-conductivity theory.

This chapter discusses the static magnetic properties of the rare earth metals. These, in the general sense, are the macroscopic average response of the material to the microscopic interactions discussed in other chapters of this volume. The study of bulk features complements atomic scale experiments such as neutron diffraction, Möss and ...

Rare earth elements (REEs) including the lanthanides, scandium (Sc) and yttrium (Y) share similar physical and chemical properties (Qi, 2018). ... These results qualitatively confirm that the mixture 25%TBP + 75% Cyanex 572 has an active role in the extraction of REEs, which are in agreement with the results obtained in the previous …

Abstract The effect of rare-earth elements on the microstructure and properties of an Mg–Zr–REM magnesium alloy, which is characterized by enhanced strength characteristics and an elevated ignition temperature, is studied. When the alloy was melted, its alloying range was varied. Comprehensive studies of the …

The third-element effect was explained qualitatively in Wagner's paper [16]. The third element was considered to play a role of "getter" which inhibits the diffusion of O to internal alloy so as to inhibit the inner oxidation of Y. For high temperature oxidation of Mg–Y–Ce alloys, MgO, Y 2 O 3 and Ce 2 O 3 initially form simultaneously.

Rare earth minerals (REMs) such as bastnaesite, monazite, and xenotime are of considerable significance since they are the main commercial sources for rare earth elements (REEs) with cutting-edge applications. Fundamental understanding of surface properties of REMs is essential to identify the reactions taking place at different …

A portable handheld laser-induced breakdown spectroscopy (HH LIBS) instrument was evaluated as a rapid method to qualitatively analyze rare earth elements in a uranium oxide matrix. This research is motivated by the need for development of a method to perform rapid, at-line chemical analysis in a nuclear facility, particularly to provide a ...

MP. SQM. CSTM. TROX. In this article, we will take a look at the 14 best rare earth stocks and ETFs. To see more such companies, go directly to 5 Best Rare Earth Stocks and ETFs. Rare earth metals ...

Introduction. Jump To. The research in the field of rare earth elements (REEs) and their compounds is ongoing to better understand their physics and chemistry, which is essential to develop more efficient …

The most unusual observation of all is the non-bulk superconductivity up to 49 K induced in single-crystalline Ca122 at ambient pressure by slight Ca-replacement with a rare-earth element, La, Ce, Pr, or Nd [(Ca 1-x R x)122] [16, 17], as exemplified by their magnetic susceptibility and resistivity as a function of temperature with a two-step ...

This paper examines these distortions of the rare earth market with a systemic approach. Problems are identified and structured qualitatively in order to expose their economic and political connections. The systemic problems are (1) competing political-economic models, (2) resource nationalism, (3) market opacity, (4) a lack of trust, (5) …

But the rare earths remain in relatively short supply throughout the world, the primary sources being in China (38%), Vietnam, Brazil and Russia. That combination of …

A portable handheld laser-induced breakdown spectroscopy (HH LIBS) instrument was evaluated as a rapid method to qualitatively analyze rare earth elements in a uranium oxide matrix. This research is motivated by the need for development of a method to perform rapid, at-line chemical analysis in a nuclear facility, particularly to …

A precise definition of rare earth elements (REEs) and in-depth discussion of how common REEs are, worldwide REE production, and current …

Rare earth enterprises can choose two behavioral strategies of legal mining or illegal mining, and their strategy set is M 2 ... Therefore, due to the limitation of space, this paper only qualitatively analyzes the asymptotic stability of points A (the initial stage of environmental regulation in rare earth mining areas), D, and H.

Key takeaway: 'Rare earth element distribution in hydrothermal minerals is influenced by crystallographic control, with Eu being anomalously enriched in barite and depleted in siderite.'

I would like to divide the time between that year and the present day into 4 periods of application of the rare earths. First Period: 1788 - 1891 is the preliminary period in which the rare earth elements were scientifically examined but were not yet techni cally used. Second Period: 1891 - 1930 is the period of first industrial usage of the ...

Following the initial discovery of superconductivity in Nd 0.8 Sr 0.2 NiO 2 (), the subsequent development of rare-earth (R) variants with Pr and La in place of Nd (2–5) has created an emerging family of superconducting infinite-layer nickelates (6–8).Unlike the cuprates, with which the nickelates are often compared, R-site variations are expected to …

Rare earth selements (REEs) are a group of metallic elements gaining growing attention in biology. REEs are comprised of 17 elements with scandium (Sc), yttrium (Y), and 15f-block lanthanides (Ln) with atomic numbers ranging from 57 to 71, for lanthanum (La) and lutetium (Lu), respectively. ... which were quantitatively and …

MORB alteration: Rare-earth element/non-rare-earth hygromagmaphile element fractionation ... Qualitatively, the fractionations between REE and non-RE HYG.E in altered basalts are considered regarding the recycling of the oceanic crust into the Earth mantle. The results point out that the interactions between a fluid phase (seawater) and …

This paper examines these distortions of the rare earth market with a systemic approach. Problems are identified and structured qualitatively in order to expose their economic and political connections. The systemic problems are (1) competing political-economic models, (2) resource nationalism, (3) market opacity, (4) a lack of trust, (5) …

Ion adsorption-type rare earth element (REE) ore deposits in South China are a major source of heavy rare earth elements (HREE) around the world, which are of considerable economic and strategic significance. In these ores, REE is enriched in the clay minerals, specifically kaolinite and halloysite, which are derived from their parent granitoid by the …

Published by Statista Research Department, Feb 6, 2024. China's reserves of rare earths amounted to an estimated 44 million metric tons of rare earth oxide equivalent (REO) in 2023, thereby ...

This dataset is in support of the publication "The addition of 144Nd to routine ICP-MS analysis as a quick screening tool for approximating earth elements (Q-STAR) in natural waters". It contains inductively coupled plasma mass spectrometry (ICP-MS) data from samples analyzed at the National Water Quality Laboratory (NWQL) from April 2021 …

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. ...

LIBS spectra obtained using an Echelle spectrometer for 1% by weight of each of the rare earth (Eu, Gd, La, Nd, Pr, and Sm) and Y (transition metal) oxides, mixed with a 99% balance of graphite powder are shown in Fig. 1 (a). The elemental concentrations range from 0.79% for Y to 0.87% for Gd. The acquired range of the …

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:

Chemistry. 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...

The exploitation of ion adsorption-type rare earth element (REE) deposits using in-situ leaching technology has become increasingly popular in recent years. However, the migration of REEs into the surrounding environment has raised significant concerns. ... Thus, XAFS speciation results are qualitatively consistent with that of …