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Hydrothermal synthesis and crystal structure of pyrite

2004; Elsevier BV; Volume: 266; Issue: 4 Linguagem: Inglês

10.1016/j.jcrysgro.2004.02.020

1873-5002

Rong Wu, Yangong Zheng, XueBing ZHANG, Yong Sun, Jingxian Xu, J.K. Jian,

Extraction and Separation Processes

A single-stage low-temperature hydrothermal synthesis route has been successfully developed for the preparation of pyrite FeS2. The as-prepared pyrite FeS2 was characterized by X-ray diffraction (XRD), a Rietveld refinement method, scanning electron microscopy (SEM) and ultraviolet–visible (UV–VIS) spectrophotometry. The XRD and Rietveld structure refinement indicated that the sample structure is a typical AB2 cubic of space group Pa3 with a lattice constant a=5.4151 Å and a Wyckoff parameter u=0.3868. SEM showed that the polycrystalline pyrite was well crystallized. A possible mechanism for the formation mechanism of the pyrite is discussed. The influences of reaction time and pH on the formation of the target compound were investigated.