Synthesis and oxide ion conductivity of lanthanum-europium oxide fluoride, La2Eu2O3F6
Identifieur interne :
005477 ( PascalFrancis/Corpus );
précédent :
005476;
suivant :
005478
Synthesis and oxide ion conductivity of lanthanum-europium oxide fluoride, La2Eu2O3F6
Auteurs : Masayuki Takashima ;
Susumu Yonezawa ;
Marc LeblancSource :
-
Solid state ionics [ 0167-2738 ] ; 2002.
RBID : Pascal:03-0071315
Descripteurs français
- Pascal (Inist)
- Conductivité ionique,
Structure cristalline,
Phase métastable,
Conductivité électrique,
Polyèdre coordination,
Diffraction RX,
TGA,
Méthode électrochimique,
Lanthane Oxyfluorure,
Europium Oxyfluorure,
Composé quaternaire,
Etude expérimentale,
La2Eu2O3F6,
Eu F La O,
6630H,
6166F.
English descriptors
- KwdEn :
- Coordination polyhedron,
Crystal structure,
Electrical conductivity,
Electrochemical method,
Europium Oxyfluorides,
Experimental study,
Ionic conductivity,
Lanthanum Oxyfluorides,
Metastable phases,
Quaternary compounds,
TGA,
XRD.
Abstract
La2Eu2O3F6 was prepared by solid-solid reaction between 1-mol La2O3 and 2-mol EuF3 at 1473 K. The crystal structure of La2Eu2O3F6 was analyzed to be the monoclinic structure (a0=0.403 nm, b0=1.14 nm, c0=0.572 nm, β=135.2°) derived from the fluorite structure. The ionic arrangement was suggested to be somewhat disordered in the La2Eu2O3F6 in contrast to that in the Nd2Eu2O3F6 with highly ordered ionic arrangement. It was assumed that the disorder in La2Eu2O3F6 resulted in the lower oxide conductivity, La2Eu2O3F6 (σ=0.8 S m-1, τO2-=0.7 at 773 K), than that of Nd2Eu2O3F6 (σ=2.0 S m-1, τO2=0.9 at 773 K). La2Eu2O3F6 was stable up to ca. 970 K in air, and converted into LaEuO3 (monoclinic) at 1623 K through the metastable state of La2EuO2F2 (rhombohedral) at ca. 1190 K by the pyrohydrolysis. The electrical conductivity declined due to pyrohydrolysis; LaEuO2F2, σ2.0×10-2 S m-1, LaEuO3, σ7.0×10-5 S m-1 at 873 K.
Notice en format standard (ISO 2709)
Pour connaître la documentation sur le format Inist Standard.
pA |
A01 | 01 | 1 | | @0 0167-2738 |
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A02 | 01 | | | @0 SSIOD3 |
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A03 | | 1 | | @0 Solid state ion. |
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A05 | | | | @2 154-5 |
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A08 | 01 | 1 | ENG | @1 Synthesis and oxide ion conductivity of lanthanum-europium oxide fluoride, La2Eu2O3F6 |
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A09 | 01 | 1 | ENG | @1 Materials and Processes for Energy and Environment. Part B |
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A11 | 01 | 1 | | @1 TAKASHIMA (Masayuki) |
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A11 | 02 | 1 | | @1 YONEZAWA (Susumu) |
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A11 | 03 | 1 | | @1 LEBLANC (Marc) |
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A12 | 01 | 1 | | @1 BADWAL (S. P. S.) @9 ed. |
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A14 | 01 | | | @1 Department of Materials Science and Engineering, Faculty of Engineering, Fukui University @2 3-9-1 Bunkyo, Fukui 910-8507 @3 JPN @Z 1 aut. @Z 2 aut. |
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A14 | 02 | | | @1 Laboratoire des Fluorures UPRES-A 6010, Faculte des Sciences, Universite du Maine @3 FRA @Z 3 aut. |
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A15 | 01 | | | @1 CSIRO Manufacturing and Infrastructure Technology, Private Bag 33 @2 Clayton South, Victoria @3 AUS @Z 1 aut. |
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A18 | 01 | 1 | | @1 International Society for Solid State Ionics (ISSI) @3 INT @9 patr. |
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A20 | | | | @1 547-553 |
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A21 | | | | @1 2002 |
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A23 | 01 | | | @0 ENG |
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A43 | 01 | | | @1 INIST @2 18305 @5 354000106857910770 |
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A44 | | | | @0 0000 @1 © 2003 INIST-CNRS. All rights reserved. |
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A45 | | | | @0 12 ref. |
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A47 | 01 | 1 | | @0 03-0071315 |
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A60 | | | | @1 P @2 C |
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A61 | | | | @0 A |
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A64 | 01 | 1 | | @0 Solid state ionics |
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A66 | 01 | | | @0 NLD |
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C01 | 01 | | ENG | @0 La2Eu2O3F6 was prepared by solid-solid reaction between 1-mol La2O3 and 2-mol EuF3 at 1473 K. The crystal structure of La2Eu2O3F6 was analyzed to be the monoclinic structure (a0=0.403 nm, b0=1.14 nm, c0=0.572 nm, β=135.2°) derived from the fluorite structure. The ionic arrangement was suggested to be somewhat disordered in the La2Eu2O3F6 in contrast to that in the Nd2Eu2O3F6 with highly ordered ionic arrangement. It was assumed that the disorder in La2Eu2O3F6 resulted in the lower oxide conductivity, La2Eu2O3F6 (σ=0.8 S m-1, τO2-=0.7 at 773 K), than that of Nd2Eu2O3F6 (σ=2.0 S m-1, τO2=0.9 at 773 K). La2Eu2O3F6 was stable up to ca. 970 K in air, and converted into LaEuO3 (monoclinic) at 1623 K through the metastable state of La2EuO2F2 (rhombohedral) at ca. 1190 K by the pyrohydrolysis. The electrical conductivity declined due to pyrohydrolysis; LaEuO2F2, σ2.0×10-2 S m-1, LaEuO3, σ7.0×10-5 S m-1 at 873 K. |
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C02 | 01 | 3 | | @0 001B60F30H |
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C02 | 02 | 3 | | @0 001B60A66F1 |
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C03 | 01 | 3 | FRE | @0 Conductivité ionique @5 02 |
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C03 | 01 | 3 | ENG | @0 Ionic conductivity @5 02 |
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C03 | 02 | 3 | FRE | @0 Structure cristalline @5 03 |
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C03 | 02 | 3 | ENG | @0 Crystal structure @5 03 |
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C03 | 03 | 3 | FRE | @0 Phase métastable @5 05 |
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C03 | 03 | 3 | ENG | @0 Metastable phases @5 05 |
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C03 | 04 | 3 | FRE | @0 Conductivité électrique @5 06 |
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C03 | 04 | 3 | ENG | @0 Electrical conductivity @5 06 |
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C03 | 05 | X | FRE | @0 Polyèdre coordination @5 07 |
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C03 | 05 | X | ENG | @0 Coordination polyhedron @5 07 |
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C03 | 05 | X | SPA | @0 Poliedro coordinación @5 07 |
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C03 | 06 | 3 | FRE | @0 Diffraction RX @5 08 |
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C03 | 06 | 3 | ENG | @0 XRD @5 08 |
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C03 | 07 | 3 | FRE | @0 TGA @5 09 |
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C03 | 07 | 3 | ENG | @0 TGA @5 09 |
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C03 | 08 | X | FRE | @0 Méthode électrochimique @5 10 |
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C03 | 08 | X | ENG | @0 Electrochemical method @5 10 |
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C03 | 08 | X | SPA | @0 Método electroquímico @5 10 |
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C03 | 09 | 3 | FRE | @0 Lanthane Oxyfluorure @2 NC @2 NA @5 11 |
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C03 | 09 | 3 | ENG | @0 Lanthanum Oxyfluorides @2 NC @2 NA @5 11 |
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C03 | 10 | 3 | FRE | @0 Europium Oxyfluorure @2 NC @2 NA @5 12 |
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C03 | 10 | 3 | ENG | @0 Europium Oxyfluorides @2 NC @2 NA @5 12 |
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C03 | 11 | 3 | FRE | @0 Composé quaternaire @5 13 |
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C03 | 11 | 3 | ENG | @0 Quaternary compounds @5 13 |
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C03 | 12 | 3 | FRE | @0 Etude expérimentale @5 14 |
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C03 | 12 | 3 | ENG | @0 Experimental study @5 14 |
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C03 | 13 | 3 | FRE | @0 La2Eu2O3F6 @4 INC @5 53 |
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C03 | 14 | 3 | FRE | @0 Eu F La O @4 INC @5 54 |
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C03 | 15 | 3 | FRE | @0 6630H @2 PAC @4 INC @5 56 |
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C03 | 16 | 3 | FRE | @0 6166F @2 PAC @4 INC @5 57 |
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C07 | 01 | 3 | FRE | @0 Lanthanide composé @5 48 |
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C07 | 01 | 3 | ENG | @0 Rare earth compounds @5 48 |
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C07 | 02 | 3 | FRE | @0 Composé minéral @5 49 |
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C07 | 02 | 3 | ENG | @0 Inorganic compounds @5 49 |
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N21 | | | | @1 041 |
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N82 | | | | @1 PSI |
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pR |
A30 | 01 | 1 | ENG | @1 SSI 2001 International Conference on Solid State Ionics @3 Cairns AUS @4 2001-07-08 |
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Format Inist (serveur)
NO : | PASCAL 03-0071315 INIST |
ET : | Synthesis and oxide ion conductivity of lanthanum-europium oxide fluoride, La2Eu2O3F6 |
AU : | TAKASHIMA (Masayuki); YONEZAWA (Susumu); LEBLANC (Marc); BADWAL (S. P. S.) |
AF : | Department of Materials Science and Engineering, Faculty of Engineering, Fukui University/3-9-1 Bunkyo, Fukui 910-8507/Japon (1 aut., 2 aut.); Laboratoire des Fluorures UPRES-A 6010, Faculte des Sciences, Universite du Maine/France (3 aut.); CSIRO Manufacturing and Infrastructure Technology, Private Bag 33/Clayton South, Victoria/Australie (1 aut.) |
DT : | Publication en série; Congrès; Niveau analytique |
SO : | Solid state ionics; ISSN 0167-2738; Coden SSIOD3; Pays-Bas; Da. 2002; Vol. 154-5; Pp. 547-553; Bibl. 12 ref. |
LA : | Anglais |
EA : | La2Eu2O3F6 was prepared by solid-solid reaction between 1-mol La2O3 and 2-mol EuF3 at 1473 K. The crystal structure of La2Eu2O3F6 was analyzed to be the monoclinic structure (a0=0.403 nm, b0=1.14 nm, c0=0.572 nm, β=135.2°) derived from the fluorite structure. The ionic arrangement was suggested to be somewhat disordered in the La2Eu2O3F6 in contrast to that in the Nd2Eu2O3F 6 with highly ordered ionic arrangement. It was assumed that the disorder in La2Eu2O3F6 resulted in the lower oxide conductivity, La2Eu2O3F6 (σ=0.8 S m-1, τO2-=0.7 at 773 K), than that of Nd2Eu2O3F6 (σ=2.0 S m-1, τO2=0.9 at 773 K). La2Eu2O3F6 was stable up to ca. 970 K in air, and converted into LaEuO3 (monoclinic) at 1623 K through the metastable state of La2EuO2F2 (rhombohedral) at ca. 1190 K by the pyrohydrolysis. The electrical conductivity declined due to pyrohydrolysis; LaEuO2F2, σ2.0×10-2 S m-1, LaEuO3, σ7.0×10-5 S m-1 at 873 K. |
CC : | 001B60F30H; 001B60A66F1 |
FD : | Conductivité ionique; Structure cristalline; Phase métastable; Conductivité électrique; Polyèdre coordination; Diffraction RX; TGA; Méthode électrochimique; Lanthane Oxyfluorure; Europium Oxyfluorure; Composé quaternaire; Etude expérimentale; La2Eu2O3F6; Eu F La O; 6630H; 6166F |
FG : | Lanthanide composé; Composé minéral |
ED : | Ionic conductivity; Crystal structure; Metastable phases; Electrical conductivity; Coordination polyhedron; XRD; TGA; Electrochemical method; Lanthanum Oxyfluorides; Europium Oxyfluorides; Quaternary compounds; Experimental study |
EG : | Rare earth compounds; Inorganic compounds |
SD : | Poliedro coordinación; Método electroquímico |
LO : | INIST-18305.354000106857910770 |
ID : | 03-0071315 |
Links to Exploration step
Pascal:03-0071315
Le document en format XML
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Eu<sub>2</sub>
O<sub>3</sub>
F<sub>6</sub>
</title>
<author><name sortKey="Takashima, Masayuki" sort="Takashima, Masayuki" uniqKey="Takashima M" first="Masayuki" last="Takashima">Masayuki Takashima</name>
<affiliation><inist:fA14 i1="01"><s1>Department of Materials Science and Engineering, Faculty of Engineering, Fukui University</s1>
<s2>3-9-1 Bunkyo, Fukui 910-8507</s2>
<s3>JPN</s3>
<sZ>1 aut.</sZ>
<sZ>2 aut.</sZ>
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</author>
<author><name sortKey="Yonezawa, Susumu" sort="Yonezawa, Susumu" uniqKey="Yonezawa S" first="Susumu" last="Yonezawa">Susumu Yonezawa</name>
<affiliation><inist:fA14 i1="01"><s1>Department of Materials Science and Engineering, Faculty of Engineering, Fukui University</s1>
<s2>3-9-1 Bunkyo, Fukui 910-8507</s2>
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<author><name sortKey="Leblanc, Marc" sort="Leblanc, Marc" uniqKey="Leblanc M" first="Marc" last="Leblanc">Marc Leblanc</name>
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<sourceDesc><biblStruct><analytic><title xml:lang="en" level="a">Synthesis and oxide ion conductivity of lanthanum-europium oxide fluoride, La<sub>2</sub>
Eu<sub>2</sub>
O<sub>3</sub>
F<sub>6</sub>
</title>
<author><name sortKey="Takashima, Masayuki" sort="Takashima, Masayuki" uniqKey="Takashima M" first="Masayuki" last="Takashima">Masayuki Takashima</name>
<affiliation><inist:fA14 i1="01"><s1>Department of Materials Science and Engineering, Faculty of Engineering, Fukui University</s1>
<s2>3-9-1 Bunkyo, Fukui 910-8507</s2>
<s3>JPN</s3>
<sZ>1 aut.</sZ>
<sZ>2 aut.</sZ>
</inist:fA14>
</affiliation>
</author>
<author><name sortKey="Yonezawa, Susumu" sort="Yonezawa, Susumu" uniqKey="Yonezawa S" first="Susumu" last="Yonezawa">Susumu Yonezawa</name>
<affiliation><inist:fA14 i1="01"><s1>Department of Materials Science and Engineering, Faculty of Engineering, Fukui University</s1>
<s2>3-9-1 Bunkyo, Fukui 910-8507</s2>
<s3>JPN</s3>
<sZ>1 aut.</sZ>
<sZ>2 aut.</sZ>
</inist:fA14>
</affiliation>
</author>
<author><name sortKey="Leblanc, Marc" sort="Leblanc, Marc" uniqKey="Leblanc M" first="Marc" last="Leblanc">Marc Leblanc</name>
<affiliation><inist:fA14 i1="02"><s1>Laboratoire des Fluorures UPRES-A 6010, Faculte des Sciences, Universite du Maine</s1>
<s3>FRA</s3>
<sZ>3 aut.</sZ>
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<series><title level="j" type="main">Solid state ionics</title>
<title level="j" type="abbreviated">Solid state ion.</title>
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<imprint><date when="2002">2002</date>
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<seriesStmt><title level="j" type="main">Solid state ionics</title>
<title level="j" type="abbreviated">Solid state ion.</title>
<idno type="ISSN">0167-2738</idno>
</seriesStmt>
</fileDesc>
<profileDesc><textClass><keywords scheme="KwdEn" xml:lang="en"><term>Coordination polyhedron</term>
<term>Crystal structure</term>
<term>Electrical conductivity</term>
<term>Electrochemical method</term>
<term>Europium Oxyfluorides</term>
<term>Experimental study</term>
<term>Ionic conductivity</term>
<term>Lanthanum Oxyfluorides</term>
<term>Metastable phases</term>
<term>Quaternary compounds</term>
<term>TGA</term>
<term>XRD</term>
</keywords>
<keywords scheme="Pascal" xml:lang="fr"><term>Conductivité ionique</term>
<term>Structure cristalline</term>
<term>Phase métastable</term>
<term>Conductivité électrique</term>
<term>Polyèdre coordination</term>
<term>Diffraction RX</term>
<term>TGA</term>
<term>Méthode électrochimique</term>
<term>Lanthane Oxyfluorure</term>
<term>Europium Oxyfluorure</term>
<term>Composé quaternaire</term>
<term>Etude expérimentale</term>
<term>La2Eu2O3F6</term>
<term>Eu F La O</term>
<term>6630H</term>
<term>6166F</term>
</keywords>
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<front><div type="abstract" xml:lang="en">La<sub>2</sub>
Eu<sub>2</sub>
O<sub>3</sub>
F<sub>6</sub>
was prepared by solid-solid reaction between 1-mol La<sub>2</sub>
O<sub>3</sub>
and 2-mol EuF<sub>3</sub>
at 1473 K. The crystal structure of La<sub>2</sub>
Eu<sub>2</sub>
O<sub>3</sub>
F<sub>6</sub>
was analyzed to be the monoclinic structure (a<sub>0</sub>
=0.403 nm, b<sub>0</sub>
=1.14 nm, c<sub>0</sub>
=0.572 nm, β=135.2°) derived from the fluorite structure. The ionic arrangement was suggested to be somewhat disordered in the La<sub>2</sub>
Eu<sub>2</sub>
O<sub>3</sub>
F<sub>6</sub>
in contrast to that in the Nd<sub>2</sub>
Eu<sub>2</sub>
O<sub>3</sub>
F<sub>6</sub>
with highly ordered ionic arrangement. It was assumed that the disorder in La<sub>2</sub>
Eu<sub>2</sub>
O<sub>3</sub>
F<sub>6</sub>
resulted in the lower oxide conductivity, La<sub>2</sub>
Eu<sub>2</sub>
O<sub>3</sub>
F<sub>6</sub>
(σ=0.8 S m<sup>-1</sup>
, τO<sup>2-</sup>
=0.7 at 773 K), than that of Nd<sub>2</sub>
Eu<sub>2</sub>
O<sub>3</sub>
F<sub>6</sub>
(σ=2.0 S m<sup>-1</sup>
, τO<sup>2</sup>
=0.9 at 773 K). La<sub>2</sub>
Eu<sub>2</sub>
O<sub>3</sub>
F<sub>6</sub>
was stable up to ca. 970 K in air, and converted into LaEuO<sub>3</sub>
(monoclinic) at 1623 K through the metastable state of La<sub>2</sub>
EuO<sub>2</sub>
F<sub>2</sub>
(rhombohedral) at ca. 1190 K by the pyrohydrolysis. The electrical conductivity declined due to pyrohydrolysis; LaEuO<sub>2</sub>
F<sub>2</sub>
, σ2.0×10<sup>-2</sup>
S m<sup>-1</sup>
, LaEuO<sub>3</sub>
, σ7.0×10<sup>-5</sup>
S m<sup>-1</sup>
at 873 K.</div>
</front>
</TEI>
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Eu<sub>2</sub>
O<sub>3</sub>
F<sub>6</sub>
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<fA12 i1="01" i2="1"><s1>BADWAL (S. P. S.)</s1>
<s9>ed.</s9>
</fA12>
<fA14 i1="01"><s1>Department of Materials Science and Engineering, Faculty of Engineering, Fukui University</s1>
<s2>3-9-1 Bunkyo, Fukui 910-8507</s2>
<s3>JPN</s3>
<sZ>1 aut.</sZ>
<sZ>2 aut.</sZ>
</fA14>
<fA14 i1="02"><s1>Laboratoire des Fluorures UPRES-A 6010, Faculte des Sciences, Universite du Maine</s1>
<s3>FRA</s3>
<sZ>3 aut.</sZ>
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<fA15 i1="01"><s1>CSIRO Manufacturing and Infrastructure Technology, Private Bag 33</s1>
<s2>Clayton South, Victoria</s2>
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<sZ>1 aut.</sZ>
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<fA18 i1="01" i2="1"><s1>International Society for Solid State Ionics (ISSI)</s1>
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<fA20><s1>547-553</s1>
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<fA60><s1>P</s1>
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<fA66 i1="01"><s0>NLD</s0>
</fA66>
<fC01 i1="01" l="ENG"><s0>La<sub>2</sub>
Eu<sub>2</sub>
O<sub>3</sub>
F<sub>6</sub>
was prepared by solid-solid reaction between 1-mol La<sub>2</sub>
O<sub>3</sub>
and 2-mol EuF<sub>3</sub>
at 1473 K. The crystal structure of La<sub>2</sub>
Eu<sub>2</sub>
O<sub>3</sub>
F<sub>6</sub>
was analyzed to be the monoclinic structure (a<sub>0</sub>
=0.403 nm, b<sub>0</sub>
=1.14 nm, c<sub>0</sub>
=0.572 nm, β=135.2°) derived from the fluorite structure. The ionic arrangement was suggested to be somewhat disordered in the La<sub>2</sub>
Eu<sub>2</sub>
O<sub>3</sub>
F<sub>6</sub>
in contrast to that in the Nd<sub>2</sub>
Eu<sub>2</sub>
O<sub>3</sub>
F<sub>6</sub>
with highly ordered ionic arrangement. It was assumed that the disorder in La<sub>2</sub>
Eu<sub>2</sub>
O<sub>3</sub>
F<sub>6</sub>
resulted in the lower oxide conductivity, La<sub>2</sub>
Eu<sub>2</sub>
O<sub>3</sub>
F<sub>6</sub>
(σ=0.8 S m<sup>-1</sup>
, τO<sup>2-</sup>
=0.7 at 773 K), than that of Nd<sub>2</sub>
Eu<sub>2</sub>
O<sub>3</sub>
F<sub>6</sub>
(σ=2.0 S m<sup>-1</sup>
, τO<sup>2</sup>
=0.9 at 773 K). La<sub>2</sub>
Eu<sub>2</sub>
O<sub>3</sub>
F<sub>6</sub>
was stable up to ca. 970 K in air, and converted into LaEuO<sub>3</sub>
(monoclinic) at 1623 K through the metastable state of La<sub>2</sub>
EuO<sub>2</sub>
F<sub>2</sub>
(rhombohedral) at ca. 1190 K by the pyrohydrolysis. The electrical conductivity declined due to pyrohydrolysis; LaEuO<sub>2</sub>
F<sub>2</sub>
, σ2.0×10<sup>-2</sup>
S m<sup>-1</sup>
, LaEuO<sub>3</sub>
, σ7.0×10<sup>-5</sup>
S m<sup>-1</sup>
at 873 K.</s0>
</fC01>
<fC02 i1="01" i2="3"><s0>001B60F30H</s0>
</fC02>
<fC02 i1="02" i2="3"><s0>001B60A66F1</s0>
</fC02>
<fC03 i1="01" i2="3" l="FRE"><s0>Conductivité ionique</s0>
<s5>02</s5>
</fC03>
<fC03 i1="01" i2="3" l="ENG"><s0>Ionic conductivity</s0>
<s5>02</s5>
</fC03>
<fC03 i1="02" i2="3" l="FRE"><s0>Structure cristalline</s0>
<s5>03</s5>
</fC03>
<fC03 i1="02" i2="3" l="ENG"><s0>Crystal structure</s0>
<s5>03</s5>
</fC03>
<fC03 i1="03" i2="3" l="FRE"><s0>Phase métastable</s0>
<s5>05</s5>
</fC03>
<fC03 i1="03" i2="3" l="ENG"><s0>Metastable phases</s0>
<s5>05</s5>
</fC03>
<fC03 i1="04" i2="3" l="FRE"><s0>Conductivité électrique</s0>
<s5>06</s5>
</fC03>
<fC03 i1="04" i2="3" l="ENG"><s0>Electrical conductivity</s0>
<s5>06</s5>
</fC03>
<fC03 i1="05" i2="X" l="FRE"><s0>Polyèdre coordination</s0>
<s5>07</s5>
</fC03>
<fC03 i1="05" i2="X" l="ENG"><s0>Coordination polyhedron</s0>
<s5>07</s5>
</fC03>
<fC03 i1="05" i2="X" l="SPA"><s0>Poliedro coordinación</s0>
<s5>07</s5>
</fC03>
<fC03 i1="06" i2="3" l="FRE"><s0>Diffraction RX</s0>
<s5>08</s5>
</fC03>
<fC03 i1="06" i2="3" l="ENG"><s0>XRD</s0>
<s5>08</s5>
</fC03>
<fC03 i1="07" i2="3" l="FRE"><s0>TGA</s0>
<s5>09</s5>
</fC03>
<fC03 i1="07" i2="3" l="ENG"><s0>TGA</s0>
<s5>09</s5>
</fC03>
<fC03 i1="08" i2="X" l="FRE"><s0>Méthode électrochimique</s0>
<s5>10</s5>
</fC03>
<fC03 i1="08" i2="X" l="ENG"><s0>Electrochemical method</s0>
<s5>10</s5>
</fC03>
<fC03 i1="08" i2="X" l="SPA"><s0>Método electroquímico</s0>
<s5>10</s5>
</fC03>
<fC03 i1="09" i2="3" l="FRE"><s0>Lanthane Oxyfluorure</s0>
<s2>NC</s2>
<s2>NA</s2>
<s5>11</s5>
</fC03>
<fC03 i1="09" i2="3" l="ENG"><s0>Lanthanum Oxyfluorides</s0>
<s2>NC</s2>
<s2>NA</s2>
<s5>11</s5>
</fC03>
<fC03 i1="10" i2="3" l="FRE"><s0>Europium Oxyfluorure</s0>
<s2>NC</s2>
<s2>NA</s2>
<s5>12</s5>
</fC03>
<fC03 i1="10" i2="3" l="ENG"><s0>Europium Oxyfluorides</s0>
<s2>NC</s2>
<s2>NA</s2>
<s5>12</s5>
</fC03>
<fC03 i1="11" i2="3" l="FRE"><s0>Composé quaternaire</s0>
<s5>13</s5>
</fC03>
<fC03 i1="11" i2="3" l="ENG"><s0>Quaternary compounds</s0>
<s5>13</s5>
</fC03>
<fC03 i1="12" i2="3" l="FRE"><s0>Etude expérimentale</s0>
<s5>14</s5>
</fC03>
<fC03 i1="12" i2="3" l="ENG"><s0>Experimental study</s0>
<s5>14</s5>
</fC03>
<fC03 i1="13" i2="3" l="FRE"><s0>La2Eu2O3F6</s0>
<s4>INC</s4>
<s5>53</s5>
</fC03>
<fC03 i1="14" i2="3" l="FRE"><s0>Eu F La O</s0>
<s4>INC</s4>
<s5>54</s5>
</fC03>
<fC03 i1="15" i2="3" l="FRE"><s0>6630H</s0>
<s2>PAC</s2>
<s4>INC</s4>
<s5>56</s5>
</fC03>
<fC03 i1="16" i2="3" l="FRE"><s0>6166F</s0>
<s2>PAC</s2>
<s4>INC</s4>
<s5>57</s5>
</fC03>
<fC07 i1="01" i2="3" l="FRE"><s0>Lanthanide composé</s0>
<s5>48</s5>
</fC07>
<fC07 i1="01" i2="3" l="ENG"><s0>Rare earth compounds</s0>
<s5>48</s5>
</fC07>
<fC07 i1="02" i2="3" l="FRE"><s0>Composé minéral</s0>
<s5>49</s5>
</fC07>
<fC07 i1="02" i2="3" l="ENG"><s0>Inorganic compounds</s0>
<s5>49</s5>
</fC07>
<fN21><s1>041</s1>
</fN21>
<fN82><s1>PSI</s1>
</fN82>
</pA>
<pR><fA30 i1="01" i2="1" l="ENG"><s1>SSI 2001 International Conference on Solid State Ionics</s1>
<s3>Cairns AUS</s3>
<s4>2001-07-08</s4>
</fA30>
</pR>
</standard>
<server><NO>PASCAL 03-0071315 INIST</NO>
<ET>Synthesis and oxide ion conductivity of lanthanum-europium oxide fluoride, La<sub>2</sub>
Eu<sub>2</sub>
O<sub>3</sub>
F<sub>6</sub>
</ET>
<AU>TAKASHIMA (Masayuki); YONEZAWA (Susumu); LEBLANC (Marc); BADWAL (S. P. S.)</AU>
<AF>Department of Materials Science and Engineering, Faculty of Engineering, Fukui University/3-9-1 Bunkyo, Fukui 910-8507/Japon (1 aut., 2 aut.); Laboratoire des Fluorures UPRES-A 6010, Faculte des Sciences, Universite du Maine/France (3 aut.); CSIRO Manufacturing and Infrastructure Technology, Private Bag 33/Clayton South, Victoria/Australie (1 aut.)</AF>
<DT>Publication en série; Congrès; Niveau analytique</DT>
<SO>Solid state ionics; ISSN 0167-2738; Coden SSIOD3; Pays-Bas; Da. 2002; Vol. 154-5; Pp. 547-553; Bibl. 12 ref.</SO>
<LA>Anglais</LA>
<EA>La<sub>2</sub>
Eu<sub>2</sub>
O<sub>3</sub>
F<sub>6</sub>
was prepared by solid-solid reaction between 1-mol La<sub>2</sub>
O<sub>3</sub>
and 2-mol EuF<sub>3</sub>
at 1473 K. The crystal structure of La<sub>2</sub>
Eu<sub>2</sub>
O<sub>3</sub>
F<sub>6</sub>
was analyzed to be the monoclinic structure (a<sub>0</sub>
=0.403 nm, b<sub>0</sub>
=1.14 nm, c<sub>0</sub>
=0.572 nm, β=135.2°) derived from the fluorite structure. The ionic arrangement was suggested to be somewhat disordered in the La<sub>2</sub>
Eu<sub>2</sub>
O<sub>3</sub>
F<sub>6</sub>
in contrast to that in the Nd<sub>2</sub>
Eu<sub>2</sub>
O<sub>3</sub>
F <sub>6</sub>
with highly ordered ionic arrangement. It was assumed that the disorder in La<sub>2</sub>
Eu<sub>2</sub>
O<sub>3</sub>
F<sub>6</sub>
resulted in the lower oxide conductivity, La<sub>2</sub>
Eu<sub>2</sub>
O<sub>3</sub>
F<sub>6</sub>
(σ=0.8 S m<sup>-1</sup>
, τO<sup>2-</sup>
=0.7 at 773 K), than that of Nd<sub>2</sub>
Eu<sub>2</sub>
O<sub>3</sub>
F<sub>6</sub>
(σ=2.0 S m<sup>-1</sup>
, τO<sup>2</sup>
=0.9 at 773 K). La<sub>2</sub>
Eu<sub>2</sub>
O<sub>3</sub>
F<sub>6</sub>
was stable up to ca. 970 K in air, and converted into LaEuO<sub>3</sub>
(monoclinic) at 1623 K through the metastable state of La<sub>2</sub>
EuO<sub>2</sub>
F<sub>2</sub>
(rhombohedral) at ca. 1190 K by the pyrohydrolysis. The electrical conductivity declined due to pyrohydrolysis; LaEuO<sub>2</sub>
F<sub>2</sub>
, σ2.0×10<sup>-2</sup>
S m<sup>-1</sup>
, LaEuO<sub>3</sub>
, σ7.0×10<sup>-5</sup>
S m<sup>-1</sup>
at 873 K.</EA>
<CC>001B60F30H; 001B60A66F1</CC>
<FD>Conductivité ionique; Structure cristalline; Phase métastable; Conductivité électrique; Polyèdre coordination; Diffraction RX; TGA; Méthode électrochimique; Lanthane Oxyfluorure; Europium Oxyfluorure; Composé quaternaire; Etude expérimentale; La2Eu2O3F6; Eu F La O; 6630H; 6166F</FD>
<FG>Lanthanide composé; Composé minéral</FG>
<ED>Ionic conductivity; Crystal structure; Metastable phases; Electrical conductivity; Coordination polyhedron; XRD; TGA; Electrochemical method; Lanthanum Oxyfluorides; Europium Oxyfluorides; Quaternary compounds; Experimental study</ED>
<EG>Rare earth compounds; Inorganic compounds</EG>
<SD>Poliedro coordinación; Método electroquímico</SD>
<LO>INIST-18305.354000106857910770</LO>
<ID>03-0071315</ID>
</server>
</inist>
</record>
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