rare earth qualitatively

How to use transition metal in a sentence - WordHippo

The effect was predicted to be very weak, but least weak with rare earth and transition metal ions. Tungsten is a transition metal, one of the elements that occupy the middle of the periodic table. Rhodium can be classified as a transition metal, a member of the …

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High-temperature magnetic properties of mechanically ...

shows that the rare-earth anisotropy is less important at high temperatures: the magnetization of the rare-earth ions must be coupled to the magnet’s main transition-metal magnetization, but the rare-earth transition-metal intersublattice exchange is comparatively weak and easily overcome by thermal excitation [2], [6].

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Enhancement of single particle rare earth doped NaYF4: Yb ...

doped rare earth ion upconverters [16, 17], or excitation of ... because we can explain both quantitatively and qualitatively the effect of the gold shell. The single particle results are also more consistent with our finite element calculations, without

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THE RARE EARTH ELEMENTS AND THEIR COMPOUNDS: THE ...

rare earth compounds between water and various organic solvents to find qualitatively a suitable combination of solvents which might be used in the development of a liquid-liquid counter-current extraction separation. 2 Rare earth acetylacetonates, nitrates, acetates, n-

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Analysis of Rare Earth Elements in Uranium Using Handheld ...

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.

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THE LINK BETWEEN RARE-EARTH PEAK FORMATION AND …

THE LINK BETWEEN RARE-EARTH PEAK FORMATION AND THE ASTROPHYSICAL SITE OF THE R PROCESS Matthew R. Mumpower1,2, Gail C. McLaughlin3, Rebecca Surman2, and Andrew W. Steiner4,5 1 Theory Division, Los Alamos National Laboratory, Los Alamos, NM 87544, USA; [email protected] 2 Department of Physics, University of Notre Dame, Notre Dame, IN 46556, …

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Iron oxide copper gold ore deposits - Wikipedia

Iron oxide copper-gold deposits are also often associated with other valuable trace elements such as uranium, bismuth and rare-earth metals, although these accessories are typically subordinate to copper and gold in economic terms. Some examples include the …

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Rare-earth Doped GaN – An Innovative Path Toward Area ...

The objective of this effort was to develop a qualitatively new approach to highly scalable diode-pumped solid-state lasers based on rare-earth (RE) neodymium (Nd3+) doping of gallium nitride (GaN), a high thermal conductivity material, with the goal of fully eliminating the bottleneck in

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Synthesis and evaluation of rare-earth doped glasses and ...

synthesis and evaluation of rare-earth doped glasses and crystals for optical refrigeration by wendy patterson b.s., the university of alabama in huntsville, 2000 m.s., the university of alabama in huntsville, 2002 m.s., the university of new mexico, 2008 ph.d., optical science and engineering, the university of new mexico, 2009 abstract

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ORFDRLS TICADsolid -iTNCLN~~f sesion P 3

the rare earth series the crystal field effects are com-parable t6 the exchange energy, in the first half they are somewhat larger. The detailed form of J(R) and of the ... field effects appears to account qualitatively for the complex properties of the rare earth metals. A more

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Nuclear Forensic Analysis of Uranium - Rich Materials

Nuclear Forensic Analysis of Uranium - Rich Materials Tyler L. Spano Environmental Isotope Geochemistry ... Origin of uranium deposits revealed by their rare earth element signature. Terra Nova, 2011. 4, 269. ... abundances • Plotted on log scale • Qualitatively compared as a function of deposit type • 6 deposit types based on IAEA ...

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Synthesis and evaluation of rare-earth doped glasses and ...

This research focused on developing and characterizing rare-earth doped, solid-state materials for laser cooling. In particular, the work targeted the optimization of the laser-cooling efficiency in Yb3+ and Tm3+ doped fluorides. The first instance of laser-induced cooling in a …

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Lattice Effects and the Magnetic Behaviour of Rare Earth ...

The fact that the rare earth ionic moment in a crystal typically has a substantial orbital contribution qualitatively affects the nature of the magnetic behaviour. Because there is a large orbital contribution to the total ionic moment, the effect of the crystal electric field is qualitatively more ...

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carbonatite - an overview | ScienceDirect Topics

Investigations at this outcrop demonstrated that Richardson Lucy deconvolution was highly necessary to map rare earth elements qualitatively with the presence of iron. The resulting iron and rare earth element maps show that at the center of the image there is a higher concentration of these elements.

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THE RARE EARTH PEAK: AN OVERLOOKED r-PROCESS …

lations that produce a satisfactory rare earth region compared to the solar isotopic abundances. Figure 2 highlights the free neutron abundance, Y n, during these calculations and compares that all of the simulations studied here shown qualitatively sim-ilar behavior. The rare earth region typically breaks from (n,γ) (γ,n) equilibrium at T

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"Rare earth doped polymer optical fiber and waveguide ...

Rare earth doped polymer optical fiber and waveguide amplifiers. Renyuan Gao, University of Pennsylvania. Abstract. We present the results of our studies on the optical properties, doping mechanisms, and optical signal amplification processes of rare earth doped polymer optical fiber and waveguide amplifiers.

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Photonics studies: Rare -earth chromophores for polymer ...

Further, we demonstrate that these rare earth-doped polymers are promising candidates for photonics applications, such as optical fiber and waveguide amplifiers and lasers.^ The rare earth-doped polymers we have developed are qualitatively different from previously studied …

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North America Doesn't Need China's Rare Earth Metals ...

The Gold Report: Jack, since our first interview over a year ago, the rare earth space has received a lot of ink.You were one of the first to talk about these minor metals and their strategic ...

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Nonlinear and linear shielding of rare-earth crystal-field ...

Nonlinear and linear shielding of rare-earth crystal-field interactions. A. J. Freeman, R. E. Watson ... Abstract. It was shown previously that significant nonlinear shielding of the rare-earth electrostatic crystalline-field interactions may occur, and hence that the standard parametrization scheme used to determine the crystalfield parameters ...

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RARE EARTH OXIDE EM hEELhRi

Magnetic Anomalies in the Rare Earth Oxide Superconductors GdBa2Cu3O7 x and YbBa2C u30 x by William E. Hatfield, Brian R. Rohrs, Martin L. Kirk, Jeffrey H. Helms, Hyekyeong Ro, and Eric J. Williamson Department of Chemistry The University of North Carolina Chapel Hill, North Carol Prepared for publication in

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ISSN 8540

In order to facilitate the subsequent rare earth separation and purification steps, it would be preferable to remove the bulk of trivalent rare earth elements from cerium. In this regard, the mixture of rare earth hydroxides was dried at 150 - 180oC for 10 hours to oxidize Ce3+ to Ce4+. The oxidized cake is then treated with hydrochloric

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REDISTRIBUTION OF THE RARE-EARTH ELEMENTS AMONG …

with respect to the rare-earth elements, and that all the hosts for these elements were analyzed. The following major-element mass-balanced reaction, determined by the method of singular value decomposition from mineral compositions in representative

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Rare Earth Magnetism

excitations in the rare earths, and hence in understanding the magnetic interactions and their consequences. ... and thereby to explain qualitatively and, where possible, quantitatively all features of the magnetic behaviour. In this way the limitations of the model can be explored, and appropriate ...

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Study of rare earth local moment magnetism and strongly ...

Abstract. Benefiting from unique properties of 4f electrons, rare earth based compounds are known for offering a versatile playground for condensed matter physics research as well as industrial applications.

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Rare earth contribution to the origin of Hawaiian lavas

between the rare earth fractionation patterns and lava-types was qualitatively demonstrated for a suite of twenty genetically related Hawaiian volcanic rocks, well petrochemically documented (SchILLING and WIZeCH~STER, 1966).

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The Link Between Rare-Earth Peak Formation and the ...

The primary astrophysical source of the rare-earth elements is the rapid neutron capture process ( r process). The rare-earth peak that is seen in the solar r -process residuals has been proposed to originate as a pile-up of nuclei during the end of the r process.

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Some physical properties of rare-earth chlorides in ...

Some physical properties of rare-earth chlorides in aqueous solution Abstract The aqueous solution behavior of some rare-earth chlorides has been investigated at 25° C. in the concentration range between 0.02 molal and saturation. Density measurements on solutions of lanthanum,

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Anisotropy of conductivity in rare-earth tritellurides in ...

Rare-earth tri-tellurium RTe3 is a typical quasi-two-dimensional system which exhibits obvious charge-density-wave (CDW) orders. So far, RTe3 with heavier R ions (Dy, Ho, Er, and Tm) are believed ...

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ntrs.nasa.gov

more complex spectra, we may quantitatively and qualitatively obtain an understanding of the temperature dependence of widths of rare earth ions in solids. In the majority of the transitionsstudied, even at the lowest temperatures, we find the linewidths reflect the lifetime of the interacting states, i.e., the lines are homogeneously broadened.

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Rare-earth Doped Gallium Nitride (GaN)—An Innovative Path ...

The objective of this effort was to develop a qualitatively new approach to highly scalable diode- pumped solid-state lasers based on rare-earth (RE) neodymium (Nd 3+ ) doping of gallium nitride (GaN), a high thermal conductivity material.

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New Frontiers in Rare Earth Science and Applications ...

In the author's recent publications, the grain refinement effect of rare earth was investigated qualitatively. The machinability was evaluated based on surface finish characteristics. The paper reviews the research and development work carried out in chronological order.

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Rare Earth Doped High Temperature Ceramic Selective Emitters

Rare Earth Doped High Temperature Ceramic Selective Emitters Donald L. Chubb Lewis Research Center, Cleveland, Ohio AnnaMarie Pal, Martin O. Patton, and Phillip R Jenkins Essential Research, Inc., Cleveland, Ohio National Aeronautics and Space Administration Lewis Research Center February 1999

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China’s Ace in the Hole

Rare Earth Elements World’s largest rare earth mine, Bayan Obo, China U.S. Geological Survey National Minerals Information Center. 122 JFQ th/ issue 59, 4 quarter 2010 ndupress.ndu.edu ... in creating and developing qualitatively new, specialized materials with them that

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N1J~ff - Springer

Rare earth ions are capable of producing "Kondo-like" anomalies in the physical properties of both concentrated and dilute rare earth metallic systems which are qualitatively similar.

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Newly Published Research: Analysis of Rare Earth Elements ...

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.

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Industrial Applications of Rare Earth Elements

4 RARE EARTH ELEMENTS Fourth period: From 1960 to the present is the time of qualitatively and quantitatively rapidly rising applications of the rare earth elements which …

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[1603.02600] The link between rare earth peak formation ...

In each type of astrophysical conditions, this method successfully locates a region of enhanced stability in the mass surface that is responsible for the rare earth peak. For each scenario, we find that the change in the mass surface has qualitatively different features, thus future measurements can shed light on the type of environment in ...

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Vasanth Gowda | Luleå University of Technology

In this study, we made an attempt to qualitatively study the structures of few rare earth metal complexes by employing solid state NMR, X-Ray Diffraction, and preliminary DFT calculations.

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ntrs.nasa.gov

more complex spectra, we may quantitatively and qualitatively obtain an understanding of the temperature dependence of widths of rare earth ions in solids. In the majority of the transitionsstudied, even at the lowest temperatures, we find the linewidths reflect the lifetime of the interacting states, i.e., the lines are homogeneously broadened.

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Low-Thermal-Conductivity Rare-Earth Zirconates for ...

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.

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