| フルテキストURL | フルテキストリンクなし |
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| タイトル | Monoclinic-orthorhombic phase transitions in A_2BX_4 single crystals with Sr_2GeS_4-type structure |
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| 作成者 | Kasano, H.
Kojima, M.
Shouji, T.
Mashiyama, H.
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| 作成者ヨミ | カサノ, ヒロノブ
マシヤマ, ヒロユキ
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| 作成者別表記 | 笠野, 裕修
増山, 博行
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| 作成者所属 | 山口大学大学院理工学研究科（理学）
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| 内容記述（抄録等） | The structural phase transitions including the monoclinic-orthorhombic transition (α-β transition) in K_2ZnI_4, Rb_2CoI_4 and Rb_2MnI_4 are investigated by means of X-ray diffraction. These compounds take the Sr_2GeS_4-type structure at room temperature. In Rb_2CoI_4 and Rb_2MnI_4, the α-modification is transformed to the β-modification (β-K_2SO_4-type structure) at 515 K and 510 K, respectively. In the β-modification of Rb_2MnI_4, it is found that the transition from the normal phase (space group Pmcn) to incommensurate one (modulation along c^*) takes place at around 520 K. On the other hand, the α-β transition is not observed up to the melting point in K_2ZnI_4. We discuss the α-β transition on the basis of the ratio the ionic radius of A^+ to the average bond length B-X in tetrahedral BX_4^＜2-＞ ion. It is found that the compounds in this family are classified into three types by the ratio.
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| 本文言語 | eng
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| 著者キーワード | X-ray diffraction
Sr_2GeS_4-type structure
β-K_2SO_4-type structure
α-β transition
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| 資料タイプ | text |
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| 出版者 | Taylor and Francis
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| NII資料タイプ | 学術雑誌論文 |
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| 査読の有無 | 査読あり |
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| ISSN | 0015-0193
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| NCID | AA00644949
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| 掲載誌名 | Ferroelectrics |
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| 巻 | 169 |
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| 号 | 1 |
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| 開始ページ | 149 |
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| 終了ページ | 158 |
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| 発行日 | 1995 |
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| DOI | info:doi/10.1080/00150199508217325 |
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| 関連情報URL(IsPartOf) | http://www.tandf.co.uk/journals/titles/00150193.asp
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| 著者版/出版社版 | その他 |
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| リポジトリID | 2008010253 |
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| 地域区分 | 山口大学
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| URI | http://www.lib.yamaguchi-u.ac.jp/yunoca/handle/2008010253 |
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