A NOVEL TYPE OF INCOMMENSURATE PHASE IN QUARTZ - THE ELONGATED-TRIANGLE PHASE

Authors
SAINTGREGOIRE P SNOECK E ROUCAU C LUKYANCHUK I JANOVEC V
Citation
P. Saintgregoire et al., A NOVEL TYPE OF INCOMMENSURATE PHASE IN QUARTZ - THE ELONGATED-TRIANGLE PHASE, JETP letters, 64(5), 1996, pp. 410-415
Citations number
17
Categorie Soggetti
Physics
Journal title
JETP letters → ACNP
ISSN journal
00213640
Volume
64
Issue
5
Year of publication
1996
Pages
410 - 415
Database
ISI
SICI code
0021-3640(1996)64:5<410:ANTOIP>2.0.ZU;2-4
Abstract
We present evidence for a thermodynamically stable incommensurate elon gated-triangle (ELT) phase in quartz, observed by transmission electro n microscopy at the alpha-beta structural transition. The phase sequen ce on cooling is: incommensurate equilateral-triangle (EQT) phase (fer roelectric)-incommensurate ELT (ferroelectric and ferroelastic)uniform cu phase. The ELT blocks could be responsible for the large light sca ttering in the vicinity of the alpha-beta transition. (C) 1996 America n Institute of Physics.