Optical, synchrotron X-ray and neutron diffraction investigations of structural changes in the layered compound K2Na[Ag(CN)(2)](3)

Citation
Cl. Larochelle et al., Optical, synchrotron X-ray and neutron diffraction investigations of structural changes in the layered compound K2Na[Ag(CN)(2)](3), SOL ST COMM, 114(3), 2000, pp. 155-160
Citations number
11
Categorie Soggetti
Apllied Physucs/Condensed Matter/Materiales Science
Journal title
SOLID STATE COMMUNICATIONS
ISSN journal
00381098 → ACNP
Volume
114
Issue
3
Year of publication
2000
Pages
155 - 160
Database
ISI
SICI code
0038-1098(2000)114:3<155:OSXAND>2.0.ZU;2-4
Abstract
We report a study of single-crystal Raman scattering, powder synchrotron X- ray and neutron diffraction as well as specific heat for the layered compou nd K2Na[Ag(CN)(2)](3) in the temperature range 2-300 K. Analysis of the Ram an scattering data provides evidence for structural changes at approximatel y 210 K. Synchrotron X-ray and neutron powder diffraction results indicate essential, gradual changes with temperature in the range from 1.5 to 300 K and in particular small, but significant deviations from trigonal symmetry of the pseudo-hexagonal lattice parameters a = a(ortho)/root 3, b below app roximately 210 K. The c-lattice parameter increases anomalously with decrea sing temperature. (C) 2000 Elsevier Science Ltd. All rights reserved.