Similar analysis for heavy rare earth elements revealed negative relations of Tm to agricultural land use, as well as Er, Y and Tb to artificial land, wetlands and waters. Sc was negatively correlated with wetlands and waters. Forests did not reveal any relation to analysed heavy rare earth elements (Fig. 7). Download : Download high-res image ...

The rare earth elements (REE) are a set of seventeen metallic elements. These include the fifteen lanthanides on the periodic table plus …

DOI: 10.1016/0269-7491(92)90103-H Corpus ID: 205088656; Rare earth elements (REEs) in naturally grown plants in relation to their variation in soils. @article{Ichihashi1992RareEE, title={Rare earth elements (REEs) in naturally grown plants in relation to their variation in soils.}, author={Hideki Ichihashi and Hideyoshi Morita and …

A rare earth in the series from Lu 3+ to La 3+ widens the deviation from 145° to 165° in RNiO 3. As a result, the perovskite changes from a metal to an insulator; and during that phase transition the strength of electronic correlations can be tuned over a broad range. Indeed, RNiO 3 is a classic system for studying electronic correlations in ...

The international rare earth trade network presents a scale-free feature, which means that there are always some trade relations, and countries play a crucial role in the international rare earth trade (Hou et al., 2018). Specific to a rare earth category, different conclusions are found in the study, for example, the core-edge structure of ...

1. Introduction. Dissolved rare earth elements (REE) in the oceans have a short residence time of a few hundred years compared to the mixing time of the oceans (≈1600 years) Goldberg et al., 1963, Elderfield and Greaves, 1982.This property has been used to characterize water masses Wright et al., 1984, Wright et al., 1987, Grandjean et …

Here we present interannual rare earth element (REE) records spanning the last two decades of the 20th century in two living Porites corals, collected from Longwan Bay, close to the estuarine zones off Wanquan River of Hainan Island and Hong Kong off the Pearl River Delta of Guangdong Province in the northern South China Sea. The results show …

A modified Johnson-Cook constitutive relationship for a rare-earth containing magnesium alloy 1205 2.3 Model validation In the present study a reference strain rate of 1×10-3 s-1 is selected, which is in reference to the ASTM E8/E8-11 standard where a strain rate of 2.5×10â€"4 sâ€"1 for determin- ing the yield strength and (0 ...

A new equation representing elastic modulus-porosity relation of brittle solids has been proposed. It has been shown that the proposed equation describes best the Young's modulus-porosity data of six rare-earth oxides over a wide range of porosity reported by previous investigators.

We are conducting studies of these granites to advance rare earth element (REE) resource identification and assessment by resulting in an improved understanding …

Rare earth elements in naturally grown fern Dicranopteris linearis in relation to their variation in soils in South-Jiangxi region (Southern China). Environ. Pollut. 114, 345–355 (2001).

Grades. 5 - 12+. It is Earth's relationship to the sun, and the amount of light it receives, that is responsible for the seasons and biodiversity. The amount of sun a region receives depends on the tilt of Earth's axis and not its distance from the sun. The Northern Hemisphere experiences summer during the months of June, July, and August ...

The World's Biggest Oil Producers in 2023. This was originally posted on our Voronoi app.Download the app for free on iOS or Android and discover incredible data-driven charts from a variety of trusted sources. Despite efforts to decarbonize the global economy, oil still remains one of the world's most important resources.

Ferns (Dicranopteris linearis) and soils, sampled from four rare earth mining areas and one non-mining area locating in South-Jiangxi region, were chosen for analysis of 15 rare earth elements (REEs) by inductively coupled plasma-mass spectrometry (ICP-MS). The fern samples were divided into 4 parts: root, stem, petiole, and lamina.

A low-cost rare earth Mg-5Y-Ni alloy containing LPSO phase was fabricated via multi-pass rolling in this work, and strength and ductility were enhanced based on dislocation regulation and grain ...

Due to undesired influence, the accumulation of rare earth elements (REE) in the human body has been discussed recently. However, it is usually limited to the study of the population living where REE ores and mines are located. The aim of the experiment presented was to analyse the concentration of REE in the hair of children and teenagers …

2.1.2 The Terms 'Rare' and 'Earth'. The name 'Rare Earths' is misleading as the name itself implies an earthen material which is not ubiquitous. To start with the easy part, the word 'earth' was a common denomination for an oxidic material, usually a metal oxide, i.e. a compound of an element with oxygen.

Semantic Scholar extracted view of "Desorption characteristics of rare earth (R) hydrides (R=Y, Ce, Pr, Nd, Sm, Gd and Tb) in relation to the HDDR behaviour of R–Fe-based-compounds" by V. Yartys et al.

The word "torus" comes from the Latin word meaning swelling. In sacred geometry it is the first shape to emerge from the Genesis Pattern. The torus is found in everything from atoms, to life forms and even in all cosmic bodies such as stars and galaxies. It is a primary shape in existence.

Rare earth elements (REE) include the lanthanide series (La, Ce, Pr, Nd, Pm, Sm, Eu, Gd, Tb, Dy, Ho, Er, Tm, Yb, and Lu) plus Sc and Y. All these metals occur together in different types of REE deposits such as carbonatites, alkali syenites and monaziterich placers, and are found in more than 250 minerals in the Earth's crust. The future of the world's green …

Rare earth elements (REEs) are typically present as mixtures in the environment, but a quantitative understanding of mixture toxicity and interactions of REEs is still lacking. ... Relationship between the observed and predicted relative root elongation of Triticum aestivum exposed to Y-La (A, D), Y-Ce (B, E), and La-Ce (C, F) mixtures for 4 ...

MP Materials helps fuel the electrification of global infrastructure. We are the largest producer of rare earth materials in the Western Hemisphere, through our state-of-the-art, zero-discharge operations in Mountain Pass, California. We deliver approximately 15% of global rare earth supply with a long term focus on Neodymium-Praseodymium …

@article{osti_4297885, title = {RELATION OF IONIC RADIUS TO STRUCTURES OF RARE-EARTH PHOSPHATES, ARSENATES, AND VANADATES}, author = {Carron, M K and Mrose, M E and Murata, K J}, abstractNote = {An investigation was made to assemble the available data and to correlate crystal structures of the rare earth compounds with …

Rare-earth salts, especially cerium and lanthanum salts, are known to inhibit the corrosion processes on several substrates such as steel [5], galvanised steel [6], [7] and aluminium and its alloys [8], [9]. ... The relative atomic concentration (A x) was calculated using the following relation: ...

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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 …

Low-Ti iron-oxide deposits in exposed Grenville-age rocks of New York and New Jersey belong to a distinct class of iron-oxide (Cu-U-Au–rare earth element [REE]) deposits that includes similar iron deposits in southeastern Missouri and the Kiruna district of Sweden, the giant Olympic Dam U-Cu-Au-Ag deposit (Australia), and the Bayan Obo …

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 …

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 ...

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.