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《Journal of Jilin University(Earth Science Edition)》 2012-04
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Microstructure of Sheet and Flake Pyrite Crystals in Hydrothermal Conditions

Song Dan1,Huang Fei2,3,Chen Lin1,Li Guang-lu1, Lin Jia-lei2,Li Jian-yuan2,Dong Yu1,Cheng Qiu-ming3,Wang Yong-qian3 1.The Analytical and Testing Center,Northeastern University,Shenyang 110819,China 2.College of Resources and Civil Engineering,Northeastern University,Shenyang 110819,China 3.State Key Laboratory for Geological Precesses and Mineral Resources,China University of Geosciences, Wuhan 430074,Beijing 100087,China  
In this study we observe the microstructure of sheet and flake pyrite crystals systematically using the transmission electron microscope(TEM) and we discover that numerous pyrite morphologies such as square and rectangle etc can be formed under hydrothermal conditions.Pyrite sheet and flake crystals grow perfectly and have few internal defects.Our measurement indicates that most quadrilateral pyrite crystals have two sets of edges parallel to(010) and(100),and the growth crystal face is(001);and a few quadrilateral pyrite crystals have two sets of edges parallel to(010) and(101),and the growth crystal face is(101).The long axis of rectangular flake crystals growth direction is 001.We hold that pyrite crystals have multiple morphologies,most sheet and flake crystals grow along the two-dimensional growth plane(001),and extend along the 001 direction to constitute the two-dimensional crystals.
【Fund】: 国家自然科学基金项目(40872045 41172047);; 地质过程与矿产资源国家重点实验室开放课题(GPMR200906)
【CateGory Index】: P578.292
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