Crystal Structure of K3Na(SeO4)2 at 340 K
T. Fukami
Department of Physics and Earth Sciences, Faculty of Science, University of the Ryukyus, Okinawa 903-0213, Japan
and R.H. Chen
Department of Physics, National Taiwan Normal University, Taipei, Taiwan, 117, Republic of China
Received: July 14, 1998; in final form October 12, 1998
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The crystal structure of tripotassium sodium diselenate, K3Na(SeO4)2, at 340 K is studied by single-crystal X-ray diffraction. The space group symmetry (trigonal P3) and structure parameters are determined. It is found that there exists the difference of the direction and the magnitude of the atomic displacement at the two phase transitions of 346 K and 334 K.
DOI: 10.12693/APhysPolA.94.795
PACS numbers: 61.66.Fn, 64.60.Fr