praditwan, j., 1983b. the mineralogical study of tin and niobium-tantalum minerals from several products of the concentrator plants from chaiyayuth dredge in phangnga, tantikovit mine in phuket and loon seng mine in trang, thailand (unpublished). google scholar
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appreciable amounts of niobium in the form of high-purity ferroniobium and nickel niobium are used in nickel-, cobalt-, and iron-base superalloys for such applications as jet engine components, rocket subassemblies, and heat-resisting and combustion equipment. tantalum (ta) is ductile, easily fabricated, highly resistant to corrosion by acids, and a good conductor of heat and electricity and has a high
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tantalum-niobium international study center bulletin n° 67 september 1991 third quarter philadelphia, october 1991 the tantalum-niobium international study center will hold a confer ence from october 23rd to 25th 1991 in philadelphia, pennsylvania, with the thirty-second general assembly on october 24th. the tech
11/9/2020 tantalum, always together with the chemically similar niobium, occurs in the minerals tantalite, columbite and coltan (a mix of columbite and tantalite). tantalum is a rare metal, comprising just 8×10−9% of the universe, making it fifteen times less abundant in the universe than gold (which makes up 6×10−8%).
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4/4/2021 niobium (symbol: nb; atomic number: 41) is a metallic element with soft, gray and ductile properties. in nature, it is often found along with pyrochlore mineral while its processed form is used in the manufacture of high-grade structural steel and super-alloys. the name comes from niobe, a figure in greek mythology, who was tantalus’ daughter.
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1/13/2010 tantalite contains some niobium, with the mineral being referred to as niobite or columbite when the niobium content is greater than that of tantalum. indeed, until the discovery of the world’s pyrochlore deposits in the 1950s, niobium was a by-product of tantalum mining, with increasing demand ensuring that it was highly valued and highly
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