高等学校化学学报 ›› 1998, Vol. 19 ›› Issue (8): 1195.

• 论文 • 上一篇    下一篇

水合石榴石Sr3Fe2(OH)12的温和水热合成与Mössbauer谱研究

李广社, 毛雅春, 李锡荣, 朱连杰, 冯守华   

  1. 吉林大学无机合成与制备化学开放实验室, 长春, 130023
  • 收稿日期:1997-07-14 出版日期:1998-08-24 发布日期:1998-08-24
  • 通讯作者: 冯守华
  • 作者简介:李广社,男,30岁,博士,现为西安交通大学博士后.

Hydrothermal Synthesis and Mössbauer Spectra Study of Hydrogarnet Sr3Fe2(OH)12

LI Guang-She, MAO Ya-Chun, LI Xi-Rong, ZHU Lian-Jie, FENG Shou-Hua   

  1. Key Laboratory of Inorganic Synthesis and Preparative Chemistry, Jilin University, Changchun, 130023
  • Received:1997-07-14 Online:1998-08-24 Published:1998-08-24

摘要: 在温和水热体系中合成出单相水合石榴石Sr3Fe2(OH)12.产物在573K左右经历快速的与Sr最近邻的OH-断裂与分解过程,在空气或氧气中焙烧出现从Fe(Ⅲ)到Fe(Ⅳ)的氧化.骨架Fe离子价态变化直接决定分解过程及产物的结构类型.采用Mössbauer谱联用XPS法测出Sr-Fe水合石榴石晶格中存在2种八面体Fe(OH)6.

关键词: 水热合成, 水合石榴石, Mö, ssbauer谱

Abstract: A single phase hydrogarnet Sr3Fe2(OH)12was synthesized from mild hydrothermal systems. For Sr3Fe2(OH)12, the hydroxyl groups of Sr_OH dodecahedra were decomposed in the form of four water molecules around 573 K. On heating Sr-Fe hydrogarnet in air or oxygen, an oxidation process from Fe(Ⅲ) to Fe(Ⅳ) takes place. Valence variation of the framework ions Fe(Ⅲ) determined the decomposition process and the structural types of the products. Two octahedra of Fe(OH)6in Sr-Fe hydrogarnet were first detected by combining Mössbauer spectra and XPS.

Key words: Hydrothermal synthesis, Hydrogarnet, Mö, ssbauer spectrum

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