Observation and Characterization of Micromorphology and Microstructure of Pyrite Synthesized by Hydrothermal Method
详细信息
- 责任者：Song Dan (Northeastern University ; Shenyang 110819 ; China) ; Liu Jia
- 刊名：Earth Science Frontiers
- 出版年：2013
- 卷期：20(3)
- 关键词：黄铁矿 ; pyrite ; 矿物合成 ; mineral synthesis
- 页码：p.118-122
- 图表：illus., 23 refs.
- 分类号：0700
- issnNo：ISSN1005-2321
- isbnNo：CN11-3370/P
摘要
By simulating the geological conditions of forming pyrite in hydrothermal gold deposits,using FeSO4 and CH3CSNH2 as raw materials,and keeping the ratio of Fe/S at 1∶3,the powder crystals of pyrite(FeS2) were prepared by heating for 24 hours in a certain temperature between 180-200 ℃.The morphology and components of the pyrite crystals synthesized by different hydrothermal conditions were observed by scanning electron microscopy.The phase composition of experimental product was determined by XRD.The morphology and micro-structure of the pyrite grains were systematically observed by using transmission electron microscope.The results indicated that at 200 ℃,the pyrite was relatively uniform granular with the particle size about 1 μm;at the temperature of 180 ℃,besides the granular pyrite with size of 1 μm synthesized,there were also irregular banding pyrite crystals with the bandwidth of 200 nm.With the gradual increase in crystallization temperature,the crystal morphology changed gradually from irregularly shaped crystal to regular shape crystal.In high experimental temperature,there would be the granular morphology,whereas in low temperature,irregular ribbon morphology would appear.
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