Crystal chemical and dielectric investigation of the system LiZnV1-xPxO4

Azrour, M., El Ammari, L., Depmeier, W. and Elouadi, B. (1998) Crystal chemical and dielectric investigation of the system LiZnV1-xPxO4 Annales de Chimie Science des Matériaux, 23 (1-2). pp. 251-254. DOI 10.1016/s0151-9107(98)80067-6.

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An X-ray crystallographic study has allowed us to identify a solid solution of the type LiZnV1-xPxO4 (0<= x <=0.6) inside the binary system LiZnVO4-LiZnPO4. The structure is isotypic with the phenacite like LiZnVO4. X-ray diffraction patterns are indexed according to the lattice parameters of the trigonal system and the space group R3. The mother structure can be regarded as made of a three-dimensional network of LiO4, ZnO4 and VO4 tetrahedra all having one apex oriented along [001]. The peaks, observed on the curves of the thermal variation of the dielectric constants, have allowed us to recognize a phase transition whose temperature varies continuously along the solid solution.Résumé L'étude radiocristallographique du système LiZnVO4-LiZnPO4 a permis de mettre en évidence la solution solide LiZnV1-xPxO4 (0<= x <=0.6). La structure de tous les points est isotype à la structure phénacite de LiZnVO4 qui cristallise dans le système trigonal avec le groupe d'espace R3. Cette structure est décrite par un enchaînement tridimensionnel des tétraèdres LiO4, ZnO4 et VO4 orientés selon la direction [001]. Les courbes de la variation thermique de la constante diélectrique montrent des pics de transition de phases.

Document Type: Article
Research affiliation: Kiel University
Refereed: Yes
DOI etc.: 10.1016/s0151-9107(98)80067-6
ISSN: 0151-9107
Date Deposited: 02 Feb 2012 09:37
Last Modified: 28 Mar 2018 10:16

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