Contents Menu

Mashiyama Hiroyuki

Affiliate Master Yamaguchi University

Modulated phases of LiTISO_4

Ferroelectrics Volume 217 Issue 1 Page 121-128
published_at 1998
Title
Modulated phases of LiTISO_4
Creators Kasano Hironobu
Creators Tsuchiyama Shirou
Creators Kawamura Yukihiko
Creators Mashiyama Hiroyuki
Creator Keywords
LiTlSO_4 X-ray diffraction structurally modulated phase phase transition
The structurally modulated phases in LiTlSO_4 single crystal are investigated by means of X-ray diffraction. The crystal structure of Phase I in LiTlSO_4 was decided to be isomorphous to that of Phase I (normal phase, space group Pmcn, Z = 4) in LiRbSO_4 and LiNH_4SO_4 by X-ray structural analysis at 320 K. It was found that the satellite reflections with the modulation wavenumber q ~ 0・3a^* appeared in Phase II'(298-267 K) on a cooling run. In Phases II(267-250 K) and III (below 250 K), the modulation wavenumbers were assigned as q = 1/4a^* and q = 1/6a^* + 1/2b^*, respectively. The unit cell volumes of Phases II and III were four times and six times larger than that of Phase I, respectively. It was also found that Phase II did not appear on a heating run from Phase III. The ratio b/a of the basic unit cell size was 1・732 in Phase III as if it were a hexagonal system.
Languages eng
Resource Type journal article
Publishers Taylor and Francis
Date Issued 1998
File Version Not Applicable (or Unknown)
Access Rights metadata only access
Relations
[ISSN]0015-0193
[NCID]AA00644949
info:doi/10.1080/00150199808015029
[isVersionOf] [URI]http://www.tandf.co.uk/journals/titles/00150193.asp
Schools 大学院理工学研究科(理学)