scholarly journals Distribution of Rare Earth Elements in the Rare Earth Minerals from Japan, Korea and North-Eastern China

1961 ◽  
Vol 5 (3) ◽  
pp. 167-180
Author(s):  
Isao Fujii
2021 ◽  
Vol 4 (1) ◽  
Author(s):  
J. Ochoa ◽  
E. Monteblanco ◽  
L. Cerpa ◽  
A. Gutarra-Espinoza ◽  
L. Avilés-Félix

AbstractA recently discovered the rare-earth-rich site in Capacsaya, located at 123 km northwest of Cusco, at the south of Peru, contains significant quantities of light and heavy rare-earth elements such as neodymium, lanthanum, cerium, europium, and yttrium. This work reports the identification of rare-earth elements and their associated minerals using scanning electron microscopy, energy-dispersive X-ray spectroscopy and X-ray diffraction analyses. Five (5) samples extracted from different locations at the Capacsaya site were characterized and identified K-feldspar as the mineral associated with the rare-earth elements in a representative sample with a high concentration of lanthanum and cerium. The results showed rare-earth elements contained within the mineral phase monazite, being cerium the dominant element in the phase (La, Ce, Nd)PO$$_4$$ 4 . Finally, through the electrostatic separation process we demonstrate that it was possible to achieve an efficient separation of the K-feldspar phase in the particle size range 75–150 $$\upmu$$ μ m.


2013 ◽  
Vol 12 (3) ◽  
pp. 257
Author(s):  
Joseph A. Giacalone ◽  
Genai Greenidge

Rare earth elements (also referred to as rare earth minerals, rare earth metals, green elements, rare earths or simply REEs) are comprised of 17 elements of the periodic table. The metals are often found combined together in ores and must be separated into its individual elements. On the supply side of the market, China is currently the largest producer of rare earth elements in the world, mining at least 90% of total world production. Consequently, many countries around the world rely on imports of these REEs to facilitate production of the various systems and products that are dependent on the rare earth metals as raw materials. With one supplier effectively monopolizing the rare earth industry, this imposes severe supply-chain risks to the producers of products that rely on rare earth minerals. After several actions that have restricted the supply, the United States, the European Union, and Japan have challenged China for violating provisions of its membership in the World Trade Organization. This paper will examine the rare earth industry, Chinas near-monopoly, global supply-chain risks, and strategies to reduce dependence on China, including the invocation of the WTOs dispute resolution process.


1962 ◽  
Vol 18 (4) ◽  
pp. 1127-1153
Author(s):  
V FASSEL ◽  
R CURRY ◽  
R KNISELEY

2017 ◽  
Vol 8 (1) ◽  
Author(s):  
Takaaki Hatanaka ◽  
Akimasa Matsugami ◽  
Takamasa Nonaka ◽  
Hideki Takagi ◽  
Fumiaki Hayashi ◽  
...  

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