Domain structure in the polar phase of ammonium rochelle salt

X-ray studies on ammonium Rochelle salt have been made at 103K and 293K by Weissenberg photographic method with imaging-plate. We observed split Bragg reflections at 103K using cylindrical single crystals of which axes are parallel to a and b. The split Bragg reflections can be explained by occurren...

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Bibliographic Details
Published in:Ferroelectrics 1997-01, Vol.190 (1), p.51-56
Main Authors: Kikuta, T., Shimizu, K., Nozaki, R., Shiozaki, Y.
Format: Article
Language:English
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Summary:X-ray studies on ammonium Rochelle salt have been made at 103K and 293K by Weissenberg photographic method with imaging-plate. We observed split Bragg reflections at 103K using cylindrical single crystals of which axes are parallel to a and b. The split Bragg reflections can be explained by occurrence of domain structures. The domains are associated with the phase transition from the orthorhombic P2 1 2 1 2 phase to the monoclinic P12 1 1 phase. The monoclinic angle β is estimated to be 91.2°. The superlattice reflections are also observed on reciprocal lattice points (h ± ½ k l). No incommensurate satellite reflection is observed.
ISSN:0015-0193
1563-5112
DOI:10.1080/00150199708014092