New details on the structure of the 3-q modulated phase of quartz type

New details on the structure of the 3-q modulated phase of quartz type

The 3‐q incommensurate phase of quartz is investigated both from a theoretical point of view based on symmetry considerations and experimentally by transmission electron microscopy (TEM). It is shown that harmonics of the modulation lead to undulation of discommensurations. Close to the lock‐in tran...

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Veröffentlicht in:Physica status solidi. A, Applied research Applied research, 1993-10, Vol.139 (2), p.361-370
Hauptverfasser: Saint-Grégoire, P., Snoeck, E., Janovec, V., Roucau, C.
Format: Artikel
Sprache:eng
Schlagworte:
Condensed matter: structure, mechanical and thermal properties
Crystalline state (including molecular motions in solids)
Exact sciences and technology
Physics
Structure of solids and liquids
crystallography
Theory of crystal structure, crystal symmetry
calculations and modeling
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container_issue 2
container_start_page 361
container_title Physica status solidi. A, Applied research
container_volume 139
creator Saint-Grégoire, P.
Snoeck, E.
Janovec, V.
Roucau, C.
description The 3‐q incommensurate phase of quartz is investigated both from a theoretical point of view based on symmetry considerations and experimentally by transmission electron microscopy (TEM). It is shown that harmonics of the modulation lead to undulation of discommensurations. Close to the lock‐in transition it is observed that the 6′z symmetry of the 3‐q phase can be locally reduced to 3′z. Furthermore, the structure of block boundaries which appear to be always directed along x‐type axes, is analysed.
doi_str_mv 10.1002/pssa.2211390209
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source Wiley Online Library Journals Frontfile Complete
subjects Condensed matter: structure, mechanical and thermal properties
Crystalline state (including molecular motions in solids)
Exact sciences and technology
Physics
Structure of solids and liquids
crystallography
Theory of crystal structure, crystal symmetry
calculations and modeling
title New details on the structure of the 3-q modulated phase of quartz type
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