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Dysprosium is a chemical element; it has symbol Dy and atomic number 66. It is a rare-earth element in the lanthanide series with a metallic silver luster. Dysprosium is never found in nature as a free element, though, like other lanthanides, it is found in various minerals, such as xenotime. Naturally occurring dysprosium is composed of seven isotopes, the most abundant of which is 164Dy.
Neodymium is a chemical element; it has symbol Nd and atomic number 60. It is the fourth member of the lanthanide series and is considered to be one of the rare-earth metals. It is a hard, slightly malleable, silvery metal that quickly tarnishes in air and moisture. When oxidized, neodymium reacts quickly producing pink, purple/blue and yellow compounds in the +2, +3 and +4 oxidation states. It is generally regarded as having one of the most complex spectra of the elements. Neodymium was discovered in 1885 by the Austrian chemist Carl Auer von Welsbach, who also discovered praseodymium. Neodymium is present in significant quantities in the minerals monazite and bastnäsite. Neodymium is not found naturally in metallic form or unmixed with other lanthanides, and it is usually refined for general use. Neodymium is fairly common—about as common as cobalt, nickel, or copper—and is widely distributed in the Earth's crust. Most of the world's commercial neodymium is mined in China, as is the case with many other rare-earth metals.
Terbium is a chemical element; it has the symbol Tb and atomic number 65. It is a silvery-white, rare earth metal that is malleable and ductile. The ninth member of the lanthanide series, terbium is a fairly electropositive metal that reacts with water, evolving hydrogen gas. Terbium is never found in nature as a free element, but it is contained in many minerals, including cerite, gadolinite, monazite, xenotime and euxenite.
Stable nuclides are isotopes of a chemical element whose nucleons are in a configuration that does not permit them the surplus energy required to produce a radioactive emission. The nuclei of such isotopes are not radioactive and unlike radionuclides do not spontaneously undergo radioactive decay. When these nuclides are referred to in relation to specific elements they are usually called that element's stable isotopes.
The rare-earth elements (REE), also called the rare-earth metals or rare earths, and sometimes the lanthanides or lanthanoids, are a set of 17 nearly indistinguishable lustrous silvery-white soft heavy metals. Compounds containing rare earths have diverse applications in electrical and electronic components, lasers, glass, magnetic materials, and industrial processes.
Gadolinite, sometimes known as ytterbite, is a silicate mineral consisting principally of the silicates of cerium, lanthanum, neodymium, yttrium, beryllium, and iron with the formula (Ce,La,Nd,Y)2FeBe2Si2O10. It is called gadolinite-(Ce) or gadolinite-(Y), depending on the prominent composing element. It may contain 35.5% yttria sub-group rare earths, 2.2% ceria earths, as much as to 11.6% BeO, and traces of thorium. It is found in Sweden, Norway, and the US.
A neodymium magnet (also known as NdFeB, NIB or Neo magnet) is a permanent magnet made from an alloy of neodymium, iron, and boron to form the Nd2Fe14B tetragonal crystalline structure. They are the most widely used type of rare-earth magnet.
The National Energy Technology Laboratory (NETL) is a U.S. national laboratory under the Department of Energy Office of Fossil Energy. NETL focuses on applied research for the clean production and use of domestic energy resources. It performs research and development on the supply, efficiency, and environmental constraints of producing and using fossil energy resources while maintaining affordability.
Carl Axel Arrhenius was a Swedish military officer, amateur geologist, and chemist. He is best known for his discovery of the mineral ytterbite in 1787.
Uranyl carbonate refers to the inorganic compound with the formula UO2CO3. Also known by its mineral name rutherfordine, this material consists of uranyl (UO22+) and carbonate (CO32-). Like most uranyl salts, the compound is a polymeric, each uranium(VI) center being bonded to eight O atoms. Hydrolysis products of rutherfordine are also found in both the mineral and organic fractions of coal and its fly ash and is the main component of uranium in mine tailing seepage water.
Minor metals is a widely used term in the metal industry that generally refers to metals which are a by-product of smelting a base metal. Minor metals do not have a real exchange, and are not traded on the London Metal Exchange (LME).
IREL (India) Limited is an Indian Public Sector Undertaking based in Mumbai, Maharashtra. It specializes in mining and refining rare earth metals.
Trifluorides are compounds in which one atom or ion has three fluorine atoms or ions associated. Many metals form trifluorides, such as iron, the rare-earth elements, and the metals in the groups 3, 13 and 15 of the periodic table. Most metal trifluorides are poorly soluble in water except ferric fluoride and indium(III) fluoride, but several are soluble in other solvents.
Thor Lake is a deposit of rare metals located in the Blachford Lake intrusive complex. It is situated 5 km north of the Hearne Channel of Great Slave Lake, Northwest Territories, Canada, approximately 100 kilometers east-southeast of the capital city of Yellowknife. Geologically located on the Canadian Shield it is mostly composed of peralkaline syenite. The Blatchford Lake complex was created in the early Proterozoic, 2.14 Ga ago. The deposit is divided in several sub-structures. In a small zone at the northern edge of the syenite, the T-Zone, minerals like bastnäsite, phenakite and xenotime can be found.
American Elements is a global manufacturer and distributor of advanced materials with an over 35,000-page online product catalog and compendium of information on the chemical elements, advanced materials, and high technology applications. The company's headquarters and educational programs are based in Los Angeles, California. Its research and production facilities are located in Salt Lake City, Utah; Monterrey, Mexico;China; and Manchester, UK.
Strategic material is any sort of raw material that is important to an individual's or organization's strategic plan and supply chain management. Lack of supply of strategic materials may leave an organization or government vulnerable to disruption of the manufacturing of products which require those materials. It can also refer to a group or department that manages these materials.
The rare earths trade dispute, between China on one side and several countries on the other, was over China's export restrictions on rare earth elements as well as tungsten and molybdenum. Rare earth metals are used to make powerful neodymium, praseodymium, dysprosium and terbium magnets, defense products and many electronics.
A technology-critical element (TCE) is a chemical element that is a critical raw material for modern and emerging technologies, resulting in a striking increase in their usage. Similar terms include critical elements, critical materials, energy-critical elements and elements of security.
MP Materials Corp. is an American rare-earth materials company headquartered in Las Vegas, Nevada. MP Materials owns and operates the Mountain Pass mine, the only operating rare earth mine and processing facility in the United States. MP Materials focuses its production on Neodymium-Praseodymium (NdPr), a rare earth material used in high-strength permanent magnets that power the traction motors found in electric vehicles, robotics, wind turbines, drones and other advanced motion technologies. MP Materials is listed on the New York Stock Exchange under the ticker symbol "MP". As of December 2021, JHL Capital Group, QVT Financial and CEO James Litinsky were the company's three largest shareholders, with about 7.7% of the company owned by Shenghe Resources, a Chinese company partly owned by the country's Ministry of Natural Resources.
Governments designate critical raw materials (CRM) as critical for their economies so there is no single list of such raw materials as the list varies from country to country as does the definition of critical. They include technology-critical elements, rare-earth elements and strategic materials.
References
- ↑ Nassar, Nedal T.; Brainard, Jamie; Gulley, Andrew (2020). "Evaluating the mineral commodity supply risk of the U.S. manufacturing sector". Science Advances. 6 (8): eaay8647. Bibcode:2020SciA....6.8647N. doi:10.1126/sciadv.aay8647. ISSN 2375-2548. PMC 7035000 . PMID 32128413.
- ↑ Nassar, Nedal T.; Fortier, Steven M. (2021), "Methodology and technical input for the 2021 review and revision of the U.S. Critical Minerals List", Open-File Report, US Geological Survey, doi: 10.3133/ofr20211045 , ISSN 2331-1258, S2CID 235867435
- ↑ "National Minerals Information Center - U.S. Geological Survey". 2021-12-09. Retrieved 2022-01-30.
- ↑ U.S. National Science and Technology Council,Subcommittee on Critical and Strategic Mineral Supply Chains (2016). "Assessment of Critical Minerals: Screening Methodology and Initial Application" (PDF). Retrieved 30 January 2022.
- ↑ "U.S. Department of Energy Releases 2023 Critical Materials Assessment to Evaluate Supply Chain Security for Clean Energy Technologies". Energy.gov. July 31, 2023.
- 1 2 Staff Writer (2022-02-24). "2022 Final List of Critical Minerals". U.S. Geological Survey, Department of the Interior. Federal Register. pp. 10381–10382.
- ↑ "What Are Critical Materials and Critical Minerals?". Energy.gov. 2022-02-24. Retrieved 2024-12-22.
- ↑ Tal, Eran (2024-10-15). "Why is Silver Missing from U.S. Critical Materials Lists?". The Jerusalem Post. Retrieved 2024-12-27.
- ↑ "Critical Mineral Resources: National Policy and Critical Minerals List" (PDF). Congressional Research Service. 2024-04-08.
- ↑ "What are Critical Minerals and Materials?". netl.doe.gov.