scholarly journals AN EXPERIMENTAL STUDY OF HYDROXO COMPLEX FORMATION IN BASIC AND NEAR-NEUTRAL SOLUTIONS OF RARE-EARTH ELEMENTS AND YTTRIUM AT 25 °C

2014 ◽  
Vol 55 (8) ◽  
Keyword(s):  
Experimental Study ◽  
Rare Earth ◽  
Complex Formation ◽  
Rare Earth Elements ◽  
Hydroxo Complex

An experimental study of hydroxo complex formation in basic and near-neutral solutions of rare-earth elements and yttrium at 25ºC

2014 ◽  
Vol 55 (8) ◽  
pp. 941-944 ◽  
Author(s):  
S.A. Stepanchikova ◽  
R.P. Biteikina ◽  
G.P. Shironosova ◽  
G.R. Kolonin
Keyword(s):  
Experimental Study ◽  
Rare Earth ◽  
Complex Formation ◽  
Rare Earth Elements ◽  
Hydroxo Complex

Experimental study on the sorption of rare-earth elements and other trace elements during rhyolite-hydrothermal water interactions

1993 ◽  
Vol 106 (3-4) ◽  
pp. 317-330 ◽  
Author(s):  
Y. Terakado ◽  
T. Fujitani ◽  
J. Takada
Keyword(s):  
Experimental Study ◽  
Trace Elements ◽  
Rare Earth ◽  
Rare Earth Elements ◽  
Hydrothermal Water

scholarly journals Lanthanum Diffusion in Fluorapatite at 400 °C, 50 MPa and 4–16 wt %

Separations ◽  
2021 ◽  
Vol 8 (6) ◽  
pp. 72
Author(s):  
Xiqiang Liu ◽  
Hui Zhang ◽  
Yunlong Liu
Keyword(s):  
Experimental Study ◽  
Diffusion Coefficient ◽  
Rare Earth ◽  
Rare Earth Elements ◽  
Great Influence ◽  
Hydrothermal Solution ◽  
Coefficient Increase ◽  
Geochemical Analyses ◽  
C 50

Apatite is an important carrier of rare earth elements (REEs) and phosphorite is a potential REEs resource. However, the influence of hydrothermal fluids on the migration and enrichment of REE in apatite remains controversial. The experimental study of the interaction between REE-bearing fluid and apatite is one of the essential ways to understand the chemical behavior of rare earth elements in apatite. In this study, we conducted the fluid–mineral reaction experimental study (at 400 °C, 50 MPa and 4–16 wt %) between high lanthanum (La) content hydrothermal solution and low REE content to reveal the influence of different salinities on the diffusion of rare earth elements in fluorapatite. Based on in situ geochemical analyses of experimental products, we show that the diffusion coefficients of La in fluorapatite are between 3.24 × 10−15 and 5.88 × 10−15 m2/s. The salinity of the fluid has a great influence on the diffusion coefficient, with the increase of salinity, the diffusion coefficient increase.

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