Ionic species and linkage in ZnBr2-KBr melts

Citation
Y. Iwadate et al., Ionic species and linkage in ZnBr2-KBr melts, J NON-CRYST, 293, 2001, pp. 586-594
Citations number
25
Language
INGLESE
art.tipo
Article
Categorie Soggetti
Apllied Physucs/Condensed Matter/Materiales Science
Journal title
JOURNAL OF NON-CRYSTALLINE SOLIDS
ISSN journal
0022-3093 → ACNP
Volume
293
Year of publication
2001
Pages
586 - 594
Database
ISI
SICI code
0022-3093(200111)293:<586:ISALIZ>2.0.ZU;2-K
Abstract
Structural analyses of (1 - x)ZnBr2-xKBr melts were made by time-of-flight pulsed neutron diffraction. The interatomic distance r(ij) of the nearest n eighbor Zn-Br pair was estimated at about 2.4 Angstrom which was shorter th an the sum of ionic radii 2.56 Angstrom, indicating the existence of covale nt bonding. Furthermore, the co-ordination number n(ij) of the correspondin g pair was calculated to be around 4 and the ratio of r(Br-Br) to r(Zn) (Br ) was about 1.6 which was nearly equal to tetrahedral geometry root8/3, imp lying the tetrahedral configuration. Addition of KBr to ZnBr2 made the link age of ZnBr42- tetrahedral clustering units break into pieces. (C) 2001 Els evier Science B.V. All rights reserved.