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rare earth structure

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Rare-earth metal–organic frameworks: from structure to

Rare-earth metal–organic frameworks: from structure to applications MOFs synthesized with rare-earth (RE) elements, which include scandium, yttrium and the series of fifteen lanthanides are an intriguing family of MOFs from the standpoint of both structure

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Rare-earth element Electronic structure and ionic radius

Rare-earth element Rare-earth element Electronic structure and ionic radius: The chemical, metallurgical, and physical behaviours of the rare earths are governed by the electron configuration of these elements. In general, these elements are trivalent, R3+, but several of them have other valences. The number of 4f electrons of each lanthanide is given in the table of the number of 4f

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rare-earth element Uses, Properties, & Facts Britannica

2018. 7. 8.· Rare-earth element, any member of the group of stone elements consisting of three elements in Group 3 (scandium [Sc], yttrium [Y], and lanthanum [La]) and the first extended row of elements below the main body

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(PDF) The Structure of Rare-Earth Metal Surfaces

The Structure of Rare-Earth Metal Surfaces introduces the concepts of surface crystallography and surface-structure determination, outlines the principles of the most widely used experimental

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A Brief Analysis of Global Rare Earth Trade Structure

Since a large number of cheap rare earth from China entered the international market in the late 1980s, the rare earth structure in world started to change, and China replaced the United States as the largest rare earth producer and exporter. However, due to Chinas rare earth management and other factors, rare earth prices have rebounded.

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THE ELECTRONIC STRUCTURE OF RARE-EARTHS.Band structures

2020. 8. 13.· THE ELECTRONIC STRUCTURE OF RARE-EARTHS.Band structures of rare earth metals B. Harmon To cite this version: B. Harmon. THE ELECTRONIC STRUCTURE OF RARE-EARTHS.Band structures of rare earth metals. Journal de Physique Colloques, 1979, 40 (C5), pp.C5-65-C5-70. ￿10.1051/jphyscol:1979526￿. ￿jpa-00218943￿

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Magnesium Alloys Containing Rare Earth Metals: Structure

Magnesium-based alloys containing rare-earth metals are important structural materials, as they combine low density with high-strength properties. This makes them particularly attractive for industry, especially in cases where the low weight of constructions is critical, as in aircraft and space apparatus construction. One of the remarkable features of alloys is the significant difference made

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Structure and patterns of the international rare earths

2018. 3. 1.· The international rare earths trade pattern has become increasingly complex during the past few years. It attracted wide attention and affected rare earths resources strategies of many countries. This study constructs an international rare earths trade network based on complex network theory to analyze the distribution of trading countries, the overall structure of trade, and the major

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Rare Earth hypothesis Wikipedia

2020. 8. 31.· The Rare Earth hypothesis argues that the evolution of biological complexity requires a host of fortuitous circumstances, such as a galactic habitable zone, a central star and planetary system having the requisite character, the circumstellar habitable zone, a right-sized terrestrial planet, the advantage of a gas giant guardian like Jupiter and a large natural satellite, conditions needed to

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(PDF) The Structure of Rare-Earth Metal Surfaces

The Structure of Rare-Earth Metal Surfaces introduces the concepts of surface crystallography and surface-structure determination, outlines the principles of the most widely used experimental

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Amman Jordan Gifts & Merchandise | Redbubble

A Brief Analysis of Global Rare Earth Trade Structure

Since a large number of cheap rare earth from China entered the international market in the late 1980s, the rare earth structure in world started to change, and China replaced the United States as the largest rare earth producer and exporter. However, due to Chinas rare earth management and other factors, rare earth prices have rebounded.

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Influence of rare earth cation size on the crystal structure

2016. 1. 1.· Na 2 ScSiO 4 (OH) and Na 2 YbSiO 4 (OH) crystallize in a new structure type in the orthorhombic space group Pca2 1.Within the structure are two unique silicon environments, two unique rare earth environments, four sodium environments, and ten oxygen environments. Both silicon environments result in isolated SiO 4 units that are corner shared to two RE(1) and to two RE(2)

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Structure and optical properties of rare earth-doped zinc

We report measurements of the emission lifetime, optical absorption, and vibrational density of states of the glass system (ZnO) x (ZnF 2) y (TeO 2) 1-x-y doped (0.1 mol%) with a series of rare earths. Phonon sideband spectroscopy has been successfully employed to probe vibrational structure in the immediate vicinity of the rare earth ion.

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A novel rotor structure of IPMSM with rare earth and

2020. 9. 2.· This stone presents a novel rotor structure of interior permanent magnet synchronous motor (IPMSM) using rare earth and ferrite magnets for some concerns about future supplies of materials. In this IPMSM, the total volume of Nd-Fe-B magnets can be reduced by 58 % compared with a basic IPMSM model. We analyzed motor characteristics such as the torque, efficiency, stress in the

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The structure of the rare-earth phosphate glass O 0.205 (P 2O 5

The structure of rare-earth phosphate glasses Jacqueline M Cole, Robert J Newport, Daniel T Bowron et al.-Structure of dysprosium and holmium phosphate glasses Richard A Martin, Philip S Salmon, Henry E Fischer et al.-Recent citations Multiple rare-earth ion environments in amorphous (Gd2O3)0.230(P2O5)0.770 revealed by gadolinium K -edge

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Bis(phosphinimino)methanide Rare Earth Amides:

Jelena Jenter, Peter W. Roesky, Noureddine Ajellal, Sophie M. Guillaume, Nicolas Susperregui, Laurent Maron, Bis(phosphinimino)methanide Borohydride Complexes of the Rare‐Earth Elements as Initiators for the Ring‐Opening Polymerization of ε‐Caprolactone: Combined Experimental and Computational Investigations, Chemistry A European Journal, 10.1002/chem.200903107, 16, 15, (4629-4638

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REE Rare Earth Elements Metals, Minerals, Mining, Uses

2017. 9. 10.· Rare Earth Element Production: This chart shows a history of rare earth element production, in metric tons of rare earth oxide equivalent, between 1950 and 2018. It clearly shows the United States' entry into the market in the mid-1960s when color television exploded demand. When China began selling rare

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First principles study of rare-earth oxides arXiv:cond

2008. 2. 2.· I. INTRODUCTION Even though the rare-earth (RE) elements readily oxidize, they do so with varying strength.1 Ce metal oxidizes completely to CeO 2 in the presence of air. Pr occurs natu-rally as Pr6O11, exhibiting a slightly oxygen deficient fluorite structure.The stoichiometric fluorite structure PrO2 exists under positive oxygen pressure. The rare-earth oxides from

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Rare Earth Properties ThoughtCo

2018. 6. 22.· When you look at the Periodic Table, there is a two-row block of elements located below the main body of the chart.These elements, plus lanthanum (element 57) and actinium (element 89), are known collectively as the rare earth elements or rare earth metals. Actually, they aren't particularly rare, but prior to 1945, long and tedious processes were required to purify the metals from their oxides.

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