Oxide solubility and Raman spectra of NdF3-LiF-KF-MgF2-Nd2O3 melts

被引：60

作者：

Stefanidaki, E

Photiadis, GM

Kontoyannis, CG

Vik, AF

Ostvold, T

机构：

[1] Inst Chem Engn & High Temp Chem Proc, FORTH, GR-26500 Patras, Greece

[2] Univ Patras, Dept Pharm, Patras, Greece

[3] Norwegian Univ Sci & Technol, Dept Chem, N-7194 Trondheim, Norway

来源：

JOURNAL OF THE CHEMICAL SOCIETY-DALTON TRANSACTIONS | 2002年 / 11期

关键词：

D O I：

10.1039/b111563b

中图分类号：

O61 [无机化学];

学科分类号：

070301 ; 081704 ;

摘要：

The solubility of Nd2O3 in NdF3-LiF-MgF2 melts is about 0.08-0.38 mol% when the NdF3 concentration varies from 15 to 30 mol% at 900degreesC. The solubility increases from 0.13 mol% at 750 degreesC to 0.22 mol% at 900 degreesC in the NdF3-LiF eutectic. When MgF2 is added to NdF3-LiF binary melts saturated with Nd2O3, the Nd2O3 solubility seems to decrease slightly at 30 mol% NdF3, while a slight increase was observed with 15 mol% NdF3 in the binary. When dissolving Nd2O3 in the NdF3-LiF eutectic Raman spectroscopy showed that the complex ions NdOFx(x-1)- and Nd2OF(x+3)((x-1)-) may form in the melt. The most reasonable candidates seem to be: NdOF43- and NdOF54- among the mononuclear compounds and Nd2OF106-, Nd2OF84- among the binuclear complexes.

引用

页码：2302 / 2307

页数：6

共 25 条

[1]

BROOKER MH, 1983, ADV MOLTEN SALT CHEM, V5, P27

[2] Application of density functional theory to calculation of in-crystal anionic polarizability [J].

Domene, C ;

Fowler, PW ;

Jemmer, P ;

Madden, P .

CHEMICAL PHYSICS LETTERS, 1999, 299 (01) :51-56

[3] Vibrational modes and structure of lanthanide fluoride-potassium fluoride binary melts -: LnF3-KF (Ln = La, Ce, Nd, Sm, Dy, Yb) [J].

Dracopoulos, V ;

Gilbert, B ;

Papatheodorou, GN .

JOURNAL OF THE CHEMICAL SOCIETY-FARADAY TRANSACTIONS, 1998, 94 (17) :2601-2604

[4] Vibrational modes and structure of rare earth halide alkali halide binary melts - YBr3-ABr (A=Li, K, Cs) and YF3-KF [J].

Dracopoulos, V ;

Gilbert, B ;

Borrensen, B ;

Photiadis, GM ;

Papatheodorou, GN .

JOURNAL OF THE CHEMICAL SOCIETY-FARADAY TRANSACTIONS, 1997, 93 (17) :3081-3088

[5]

Dracopoulos V, 1998, ELEC SOC S, V98, P544

[6] IN-CRYSTAL IONIC POLARIZABILITIES DERIVED BY COMBINING EXPERIMENTAL AND ABINITIO RESULTS [J].

FOWLER, PW ;

PYPER, NC .

PROCEEDINGS OF THE ROYAL SOCIETY OF LONDON SERIES A-MATHEMATICAL PHYSICAL AND ENGINEERING SCIENCES, 1985, 398 (1815) :377-393

[7]

FOWLER PW, 1985, P R SOC, V41, P1230

[8] REINVESTIGATION OF MOLTEN FLUOROALUMINATE RAMAN-SPECTRA - THE QUESTION OF THE EXISTENCE OF ALF52- IONS [J].

GILBERT, B ;

MATERNE, T .

APPLIED SPECTROSCOPY, 1990, 44 (02) :299-305

[9] CALORIMETRIC INVESTIGATION OF (XKF+(1-X)NDF3)(1) [J].

HATEM, G ;

GAUNEESCARD, M .

JOURNAL OF CHEMICAL THERMODYNAMICS, 1993, 25 (02) :219-228

[10] IR-ACTIVE AND RAMAN-ACTIVE NORMAL VIBRATIONS OF RARE-EARTH OXYFLUORIDES, REOF - RE=Y, LA, AND GD [J].

HOLSA, J ;

PIRIOU, B ;

RASANEN, M .

SPECTROCHIMICA ACTA PART A-MOLECULAR AND BIOMOLECULAR SPECTROSCOPY, 1993, 49 (04) :465-470

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