Tantalum is a chemical element with the symbol Ta and atomic number 73. Previously known as tantalium, it is named after Tantalus, a villain from Greek mythology. Tantalum is a rare, hard, blue-gray, lustrous transition metal that is highly corrosion-resistant. It is part of the refractory metals group, which are widely used as minor components in alloys.
The economy of Madagascar is $9.769 billion by gross domestic product as of 2020, being a market economy and is supported by an agricultural industry and emerging tourism, textile and mining industries. Malagasy agriculture produces tropical staple crops such as rice and cassava, as well as cash crops such as vanilla and coffee.
Coltan is a dull black metallic ore from which the elements niobium and tantalum are extracted. The niobium-dominant mineral in coltan is columbite, and the tantalum-dominant mineral is the tantalite.
The rare-earth elements (REE), also called the rare-earth metals or rare-earth oxides, or the lanthanides are a set of 17 nearly-indistinguishable lustrous silvery-white soft heavy metals. Scandium and yttrium are considered rare-earth elements because they tend to occur in the same ore deposits as the lanthanides and exhibit similar chemical properties, but have different electronic and magnetic properties.
The mineral group tantalite [(Fe, Mn)Ta2O6] is the primary source of the chemical element tantalum, a corrosion (heat and acid) resistant metal. It is chemically similar to columbite, and the two are often grouped together as a semi-singular mineral called coltan or "columbite-tantalite" in many mineral guides. However, tantalite has a much greater specific gravity than columbite (8.0+ compared to columbite's 5.2). Iron-rich tantalite is the mineral tantalite-(Fe) or ferrotantalite and manganese-rich is tantalite-(Mn) or manganotantalite.
La Générale des Carrières et des Mines (Gécamines) is a Congolese commodity trading and mining company headquartered in Lubumbashi, in the Katanga region of the Democratic Republic of Congo. It is a state-controlled corporation founded in 1966 and a successor to the Union Minière du Haut-Katanga. Gecamines is engaged in the exploration, research, exploitation and production of mineral deposits including copper and cobalt.
A native metal is any metal that is found pure in its metallic form in nature. Metals that can be found as native deposits singly or in alloys include aluminium, antimony, arsenic, bismuth, cadmium, chromium, cobalt, indium, iron, manganese, molybdenum, nickel, niobium, rhenium, selenium, tantalum, tellurium, tin, titanium, tungsten, vanadium, and zinc, as well as the gold group and the platinum group. Among the alloys found in native state have been brass, bronze, pewter, German silver, osmiridium, electrum, white gold, silver-mercury amalgam, and gold-mercury amalgam.
National Atomic Company Kazatomprom Joint Stock Company (Kazatomprom) is the world’s largest producer and seller of natural uranium, providing over 40% of global primary uranium supply in 2019 from its operations in Kazakhstan. Kazatomprom's uranium is used for the generation of nuclear power around the world.
Diana is a region in Madagascar at the northeast part of the island. It borders the regions of Sava to the southeast and Sofia to the southwest. It covers an area of 19,266 km2, and had a population of 889,736 in 2018. The regional capital is Antsiranana.
Anosy is one of the 22 regions of Madagascar. It is located in the southeast of the country, on the eastern side of what was once the Toliara Province. The name Anosy means "island(s)" in Malagasy.
The Mountain Pass Mine, owned by MP Materials, is an open-pit mine of rare-earth elements on the south flank of the Clark Mountain Range in California, 53 miles (85 km) southwest of Las Vegas, Nevada. In 2020 the mine supplied 15.8% of the world's rare-earth production. It is the only rare-earth mining and processing facility in the United States.
Kvanefjeld, in Greenland, is the site of a mineral deposit, which is claimed to be the world's second-largest deposit of rare-earth oxides, and the sixth-largest deposit of uranium. There are also substantial sodium fluoride deposits, and Kvanefjeld is thought to be one of the largest multi-element deposits of its kind in the world.
Molycorp Inc. was an American mining corporation headquartered in Greenwood Village, Colorado. The corporation, which was formerly traded on the New York Stock Exchange, owned the Mountain Pass rare earth mine in California. It filed for bankruptcy in June 2015 after changing competitive circumstances, declining prices on output and a 2014 restructuring. It was purchased by its largest creditor Oaktree Capital Management and was reorganized as Neo Performance Materials.
NPM Silmet AS is a rare-earth processor located in Sillamäe, Estonia. It is a subsidiary of Neo Performance Materials.
American Elements is a global manufacturer and distributor of advanced materials with a more than 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; Baotou, China; and Manchester, UK.
Michael Nathan Silver is a business executive, philanthropist, art collector, and commentator. He is the founder and CEO of American Elements, a global high-technology materials manufacturer. He helped establish the post-Cold War rare earth supply chain from China to the U.S. and Europe. His philanthropy includes sponsoring materials science and green technology conferences and educational television programs on high technology and contributing funding to the arts. He served as a trustee of the Natural History Museum of Los Angeles County and serves on the directors council of the Getty Museum and on the board of directors of the Institute of Contemporary Art in Los Angeles, CA. He writes and speaks on issues affecting the global high technology industry, science education and Sino-American relations.
The Ambatovy mine is large nickel and cobalt mine located in Madagascar, off the east coast of Africa. It is currently active, and the largest mine in the country.
The Mirador mine is a large copper mine located in the Amazonian province of Zamora-Chinchipe in southern Ecuador. It is one of the largest copper reserves in Ecuador, and the first industrial-scale copper project to be developed in the country. The project has generated an environmental conflict that is emblematic in the national political debate on mining.
The Abu Dabab mine is a large proposed mine located in the eastern part of Egypt in Red Sea Governorate. Abu Dabab represents one of the largest tantalum reserves in Egypt having estimated reserves of 39.9 million tonnes of ore grading 0.025% tantalum.
The Citronen mine is one of the largest potential lead and zinc mines in Greenland. The mine is located in Citronen Fjord, Northern Greenland. The mine has reserves amounting to 100 million tonnes of ore grading 2% lead and 3% zinc.
