Journal of Thermal Analysis and Calorimetry
Volume/Issue:
Volume 81: Issue 3
Structures and phase transitions in (K1-xRbx)2SeO4
Authors:
H. Shigematsu Department of Physics, Faculty of Education, Shimane University Matsue 690-8504, Japan

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Y. Akishige Department of Physics, Faculty of Education, Shimane University Matsue 690-8504, Japan

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T. Matsui Eco Topia Science Institute and Department of Materials, Physics and Engineering, Graduate School of Engineering, Nagoya University Nagoya 464-8603, Japan

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T. Tojo Materials and Structures Laboratory, Tokyo Institute of Technology Yokohama 226-8503, Japan

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H. Kawaji Materials and Structures Laboratory, Tokyo Institute of Technology Yokohama 226-8503, Japan

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T. Atake Materials and Structures Laboratory, Tokyo Institute of Technology Yokohama 226-8503, Japan

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Pages:
555–558
Online Publication Date:
08 Sep 2005
Publication Date:
01 Aug 2005
Article Category:
Research Article
DOI:
https://doi.org/10.1007/s10973-005-0822-3
Keywords:
DSC; neutron scattering; heat capacity; structural phase transition; K2SeO4; Rb2SeO4
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Summary The phase diagram of the mixed crystal (K1-xRbx)2SeO4 was determined by means of thermal analysis and neutron scattering experiments. The hexagonal to orthorhombic phase transition line exists for any x. The normal-incommensurate phase transition temperature decreases continuously with increasing Rb content. However, the incommensurate-commensurate phase transition was not observed except for K2SeO4. According to the clear softening of the Σ2- Σ 3 phonon branches and the finite frequency at 0 K for x>0.34, an existence of the hypothetical phase transition was confirmed.

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Cover Journal of Thermal Analysis and Calorimetry
Journal of Thermal Analysis and Calorimetry
Print ISSN:
1388-6150
Online ISSN:
1572-8943

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Journal of Thermal Analysis and Calorimetry
Language English
Size A4
Year of
Foundation		 1969
Volumes
per Year		 1
Issues
per Year		 24
Founder Akadémiai Kiadó
Founder's
Address		 H-1117 Budapest, Hungary 1516 Budapest, PO Box 245.
Publisher Akadémiai Kiadó
Springer Nature Switzerland AG
Publisher's
Address		 H-1117 Budapest, Hungary 1516 Budapest, PO Box 245.
CH-6330 Cham, Switzerland Gewerbestrasse 11.
Responsible
Publisher		 Chief Executive Officer, Akadémiai Kiadó
ISSN 1388-6150 (Print)
ISSN 1588-2926 (Online)

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