Loparite, a rare-earth ore (Ce, Na, Sr, Ca)(Ti, Nb, Ta, Fe+3)O3

Journal of Alloys and Compounds
By: , and 



The mineral loparite (Ce, NA, Sr, Ca)(Ti, Nb, Ta, Fe+3)O3 is the principal ore of the light-group rare-earth elements (LREE) in Russia. The complex oxide has a perovskite (ABO3) structure with coupled substitutions, polymorphism, defect chemistry and a tendency to become metamict. The A site generally contains weakly bonded, easily exchanged cations of the LREE, Na and Ca. The B site generally contains smaller, highly charged cations of Ti, Nb or Fe+3. Mine production is from Russia's Kola Peninsula. Ore is beneficiated to produce a 95% loparite concentrate containing 30% rare-earth oxides. Loparite concentrate is refined by either a chlorination process or acid decomposition process to recover rare-earths, titanium, niobium and tantalum. Rare-earths are separated by solvent extraction and selective precipitation/dissolution. The concentrate is processed at plants in Russia, Estonia and Kazakstan.
Publication type Article
Publication Subtype Journal Article
Title Loparite, a rare-earth ore (Ce, Na, Sr, Ca)(Ti, Nb, Ta, Fe+3)O3
Series title Journal of Alloys and Compounds
DOI 10.1016/S0925-8388(96)02824-1
Volume 250
Issue 1 -2 pt 2
Year Published 1997
Language English
Publisher Elsevier Science S.A.
Publisher location Lausanne, Switzerland
Larger Work Type Article
Larger Work Subtype Journal Article
Larger Work Title Journal of Alloys and Compounds
First page 467
Last page 470
Conference Title Proceedings of the 1996 21st Rare Earth Research Conference. Part 2 (of 2)
Conference Location Duluth, MN, USA
Conference Date 7 July 1996 through 12 July 1996
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