Results 41 to 50 of about 1,919 (210)
Studies on Decompositiono f Xenotime
The Journal of the Society of Chemical Industry, Japan, 1963 ゼノタイムより希土類元素を抽出する工程のうち,原鉱の硫酸およびカセイソーダによる分解について検討した。試料としたゼノタイム原鉱の組成は,R2O347.39,ThO20.69,SiO21.16,Ta2O5+Nb2O5+TiO213.60,P2O220.90,その他の酸化物14.77(%)で,粒度は100～200メッシュであった。分解の最適条件は次のとおりである。1)硫酸の場合,試料10g,濃硫酸量30ml,処理温度260℃,加熱時間2時間2)カセイソーダの場合,試料3.5g,カセイソーダ濃度50%,使用量20ml(NaOHとして15.3g),処理温度250℃,加熱時間1.5時間カセイソーダの場合,反応系はできるだけ早く乾固状になることがのぞましい。
Gin-ya Adachi +2 more
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Yankuang ceshi, 2021 BACKGROUND The Huayangchua polymetallic deposit is a super-large mineral deposit that has economic endowments of uranium and rare earth resources. The deposit is characterized by the unique ore types and complex mineral assemblage.
WAN Jian-jun +9 more
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Study Of Malaysian Rare Earth Elements: Mineral Characterization Of Monazite And Xenotime Concentrate From Amang [PDF]
, 2022 Amang, widely recognized for mineral tailings in Malaysia, is a cassiterite-tailing or tin oxide (SnO₂) secondary product inevitably formed from mineral separation processes such as gravitational, magnetic, and high-tensional separators.
Nazatul Dzahir, Nurul Fatin Nazira
core
REE MINERALS IN BLACK SHALES OF THE PALEOPROTEROZOIC MIKHAILOVKA FORMATION (BAIKAL-PATOM HIGHLAND, SIBERIA) [PDF]
Минералогия, 2022 The paper characterizes REE mineralization from carbonaceous metapelites of the Paleoproterozoic Mikhailovka Formation, which is the most ancient gold-bearing horizon of the Lena province (Bodaibo district, Irkutsk region). The conditions of metamorphism
E.E. Palenova +3 more
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Energy Geoscience, 2021 Graphitic carbons from the combustion of bituminous coals and, perhaps, other coal ranks, tend to capture iron and a number of hazardous elements, including As, Hg, and Se.
James C. Hower, John G. Groppo
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Monazite-xenotime thermometry: A review of best practices and an example from the Caledonides of Northern Scotland [PDF]
, 2023 Supplementary Material: Table 1 Monazite-xenotime-temperature ...
Richard D. Law (16484452) +3 more
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REE-bearing minerals in Drava river sediments, Slovenia, and their potential origin
Geologija, 2017 Monazite and xenotime are major ore minerals for rare earth elements (REE), Y, and actinides, a powerful tool for radiometric dating and indicators of the geological genesis of the parent rock.
Aleš Šoster +3 more
doaj +1 more source
International Journal of Technology, 2020 Xenotime sand, a byproduct of the tin mining process of PT Timah, is one of the potential gadolinium (Gd) resources. Because of similarities in their physical and chemical properties, it is difficult to separate and purify Gd from rare earth elements (
Kris Tri Basuki +3 more
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Lithosphere, 2022 We used in situ laser-ablation split-stream petrochronology to target monazite and xenotime associated with specific metamorphic index minerals in the Florence Range metamorphic suite in the northern Canadian Cordillera.
R. Soucy La Roche +4 more
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Mineralogy of alluvial sediments of Avzyan gold region (the Southern Urals)
Литосфера, 2018 The Avzyan gold region is located within the Bashkirian anticlinorium and includes lode gold deposits and placers. The Gorny Priisk, Bogryashka and Ulyuk-Bar gold deposits are hosted in the Riphean metamorphosed carbonaceous sequence.
Ekaterina E. Palenova +4 more
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