Loparite, a rare-earth ore (Ce, Na, Sr, Ca)(Ti, Nb, Ta, Fe+3)O3
Journal of Alloys and Compounds
By: James B. Hedrick, Shyama P. Sinha, and Valery D. Kosynkin
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Abstract
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.
Suggested Citation
Hedrick, J.B., Sinha, S.P., Kosynkin, V.D., 1997, Loparite, a rare-earth ore (Ce, Na, Sr, Ca)(Ti, Nb, Ta, Fe+3)O3: Journal of Alloys and Compounds, v. 250, no. 1 -2 pt 2, p. 467-470, https://doi.org/10.1016/S0925-8388(96)02824-1.
| 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 |