Refine your search�ソスF     
Report No.

Stability of lanthanide oxides in LiCl-KCl eutectic melt

Hayashi, Hirokazu ; Minato, Kazuo 

Stability of lanthanide sesquioxides (Ln$$_2$$O$$_3$$; Ln=La, Nd, Gd) in LiCl-KCl eutectic melt is studied. Some lanthanide oxides have been pointed out to form oxide chlorides (LnOCl) in the chloride melts, according to the reaction, Ln$$_2$$O$$_3$$ + 2Cl$$^-$$ = 2LnOCl +O$$^{2-}$$. Equilibrium of the reaction for Ln = La, Nd, Gd in LiCl-KCl eutectic melt were studied. Entire La$$_2$$O$$_3$$ and a part of Nd$$_2$$O$$_3$$ converted to LaOCl and NdOCl respectively, though Gd$$_2$$O$$_3$$ remained with a trace amount of GdOCl for 2wt % of Ln$$_2$$O$$_3$$ in LiCl-KCl eutectic melt. The equilibrium depends on the free energies of formation of the solid compounds, Ln$$_2$$O$$_3$$ and LnOCl, and that of oxide ion (O$$^{2-}$$) in the melt. We derive the chemical potential of the oxide ion from the equilibrium using the reported thermochemical data of Ln$$_2$$O$$_3$$ and LnOCl.



- Accesses




Category:Chemistry, Multidisciplinary



[CLARIVATE ANALYTICS], [WEB OF SCIENCE], [HIGHLY CITED PAPER & CUP LOGO] and [HOT PAPER & FIRE LOGO] are trademarks of Clarivate Analytics, and/or its affiliated company or companies, and used herein by permission and/or license.