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Deep-Sea Research, Vol. 39, No. 9, pp. 1613-1626. 1992. 0198~)149/92 $5.00 + 0.00 Printed in Great Britain. 1992 Pergamon Press Ltd Rare earth elements in the Arctic Ocean STIG WESTERLUND* and PEDER OHMAN* (Received 3 January 1991; in revised form 18 November 1991 ; accepted 21 November 1991) Abstract--In this paper we present the first data set for rare earth elements (REE) in …
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2017-7-24 · NMR IN HEAVY RARE EARTH METALS AND ALLOYS J. ITOH, N. SANO and K. SHIMIzU Faculty of Engineering Science, Osaka University, Toyonaka, Japan ABSTRACT Nuclear magnetic resonance responses of 159Tb, 163Dy and 167Er in Tb, Dy and
RARE EARTHS REPORT by Ellsworth Dickson Unless you happen to work in the rare earths industry, you probably don’t even think about these 17 rare earth metals – even though you reap their benefits every day and the military needs them to protect us.
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Abstract. The use of rare earth metals (REMs) for new applications in renewable and communication technologies has increased concern about future supply as well as environmental burdens associated with the extraction, use, and disposal (losses) of these metals.
There are 51 rare earth metals company suppliers, mainly located in Asia. The top supplying countries are China (Mainland), Vietnam, and Hong Kong, which supply 62%, 15%, and 15% of rare earth metals company respectively. Rare earth metals company products are most popular in North America, Eastern Europe, and Western Europe.
2019-6-9 · @article{osti_5123086, title = {Spin waves in the heavy-rare-earth metals Gd, Tb, Dy, and Er}, author = {Lindgard, P.}, abstractNote = {The transverse-spin-wave dispersion relation and neutron-scattering cross section for strongly anisotropic magnets is formulated in terms of effective renormalized exchange and anisotropy parameters. The spin-wave dispersion for the cone structure is ...
Spin glasses on the basis of rare earth metal compounds. Author ... in which a new class of substances a.ze being constructed on the basis of rare earth metals by formation of magnetic structures of NB (normal spiral), cin (longitudinal sinusoidal modulation), ~ ~tilted spiral) and cone ~conioal spiral) type. it has been shown that the defects ...
A new class of materials is constructed of rare earth metals and their compounds by introduction of a large number of defects into the crystal lattice-dislocations and unelastic disclinations. It is shown that superconductive phase state is possible in these materials having spin glass magnetic structure.
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2016-3-27 · The rare earth elements are comprised of scandium, yttrium, and 15 lanthanide elements, of which, cerium, lanthanum, and neodymium are the most abundant. While rare earth elements are found in several minerals, almost all production comes from less than 10 minerals, primarily monazite and bastnasite. Since the scandium industry is, for the
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Yttrium (Y) is a rare earth element that is soft, silver-metallic and lustrous. In its pure form, Yttrium is relatively stable in air in bulk form and very unstable when divided. Yttrium forms a water-insoluble fluoride, hydroxide, and oxalate. However Yttrium bromide, chloride, iodide, nitrate, and …
The cone angle of crucible was one of the important factors that induced the VGF GaAs monocrystal to become twin crystal or polycrystal.The growth of VGF GaAs ...
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Rare earth magnets are the strongest permanent magnets available and have significantly higher performance than ferrite (ceramic) and alnico magnets. The term ‘rare earth’ can be misleading as rare earth metals are relatively abundant in the Earth’s crust.
The optical transitions that occur in rare-earth-doped crystals offer promise for quantum information storage and processing. Kolesov et al. report the optical detection of a single praseodymium ...
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His research interests include trace metal fractionation and particularly critical elements (rare earth elements, cobalt, vanadium) in low-temperature aqueous systems, a better understanding of trace metal cycles in natural waters, and an improved knowledge of trace metals mobility from rock to soils and vegetation in the critical zone.
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2011-10-22 · STRUCTURE AND LUMINESCENCE PROPERTIES OF POROUS ALUMINA TEMPLATES DOPED WITH RARE EARTH ELEMENTS AND TRANSITION METALS M. Enachi1, V. Trofim1, V. Coseac2, I.M. Tiginyanu1, 3, and V.V. Ursaki3 1Technical University of Moldova, 168, Stefan cel Mare ave., MD-2004, Chisinau, Republic of Moldova
2014-3-20 · Platinum Group Metal Recovery from Spent Catalytic Converters . The catalyst component of a catalytic converter is usually platinum (Pt), along with palladium (Pd), and rhodium (Rh). All three of these platinum group metals, or PGMs, are extremely rare but have a broad range of applications in addition to catalytic converters.
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2017-6-20 · dikes and cone sheets. According to the geological literature, there are about 330 known occurrences of carbonatites worldwide, but almost all are small and noncommercial. There are only a few carbonatite deposits of commercial significance in the world. The bulk of the world's supply of rare earth elements ... Briefing Paper: Rare Earth Metals
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The effect of the addition of rare earth metals (REM) to the weld metal on the microcracking susceptibility in the multipass welds of alloy 690 was examined by using the La or Ce containing filler metals. The amounts of the La and Ce in the filler metal were varied in several levels.
Mining Rare Earth Metals Essay Example for Free. I believe that Canada should be involved in the rare earth metals mining industry. Rare earth metals are an essential part of everyday modern life (and of growing importance).