Phase Transition of KD_3(SeO_3)_2 Studied by Neutron Diffraction

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概要

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• Crystal structtu'e of low temperature phase of KD.(Se03). was studied byneutron diffraction method. Space group is Pbcn at the high temperature phaseand changes to P2./b below the transition point. At the low temperature phase,striking twin patterns due to spontaneous shear strain were observed. Suitablecorrections were applied to the observed data and the result of structure analysisrevealed that a hydrogen atom which is disordered at the high temperature phase isdistinctly bonded to one of the oxygens of Sea.. This induces slightly differentorientational changes and deformations of two Sea. tetrahedra connected bythe hydrogen. Discussion on the phase transition mechanism is given in parallelto that of KDP.

• 社団法人日本物理学会の論文
• 1979-09-15

著者

• TOKUNAGA Masaharu

  Research Institute of Applied Electricity,Hokkaido University

• KOYANO Nobumitsu

  Research Reactor Institute, Kyoto University

• SHIBUYA Iwao

  Research Reactor Institute, Kyoto University

• IWATA Yutaka

  Research Reactor Institute,Kyoto University

• Iwata Yutaka

  Research Reactor Institute Kyoto University

• Shibuya Iwao

  Research Reactor Institute Kyoto University

• Tokunaga Masaharu

  Research Institute Of Applied Electricity Hokkaido University

• Koyano Nobumitsu

  Research Reactor Institute Kyoto University

• Koyano Nobumitsu

  Research Reactor Institute,Kyoto University

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