Using High Pressure to Prepare Polymorphs of the Ba2Co1鈥?i>xZnxS3 (0 鈮?x 鈮?1.0) Compounds

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• 作者：Francesco Mezzadri ; Edmondo Gilioli ; Gianluca Calestani ; Andrea Migliori ; Mark R. Harrison ; David A. Headspith ; M. Grazia Francesconi
• 刊名：Inorganic Chemistry
• 出版年：2012
• 出版时间：January 2, 2012
• 年：2012
• 卷：51
• 期：1
• 页码：397-404
• 全文大小：424K
• 年卷期：v.51,no.1(January 2, 2012)
• ISSN：1520-510X

文摘

In this work, high pressure was used as a tool to induce structural transition and prepare metastable polymorphs of ternary sulfides. Structural transformations under high pressure of compounds belonging to the Ba₂Co_1鈥?i>xZn_xS₃ (0 鈮?x 鈮?1.0) series were studied using X-ray diffraction and electron microscopy. All members of the Ba₂Co_1鈥?i>xZn_xS₃ series show the Ba₂CoS₃-type one-dimensional structure, but, after heating under pressure, the Ba₂CoS₃ compound (x = 0) separates into BaS and the two-dimensional BaCoS_{2鈭捨?/sub> (未 鈮?0), while Ba2Co1鈥?i>xZnxS3 compounds with x 鈮?0.25 maintain their one-dimensional features but rearrange into polymorphs showing the Ba2MnS3-type structure. All structural transformations can be linked to shortening in interchain metal鈥搈etal distances caused by the high pressure, and the role of the zinc in preventing loss of one-dimensionality is discussed.}