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Synthesis of troilite by the arc-discharge method

Published online by Cambridge University Press:  25 June 2018

Chen Daizhang  and
Yang Xiang
Chen Daizhang*
Affiliation:
National Laboratory of Mineral and Rock Materials, China University of Geosciences, 29 Xueyuan Road, Beijing 100083, China
Yang Xiang
Affiliation:
National Laboratory of Mineral and Rock Materials, China University of Geosciences, 29 Xueyuan Road, Beijing 100083, China
*
*E-mail: chendzh@sky.cugb.edu.cn
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Abstract

Troilite is a sulfide that occurs commonly in meteorites. In the laboratory, it can be synthesized by gas-solid reaction of metallic Fe and H2S-H2 gas mixtures. In this research, the arc-discharge method was used to synthesize troilite. The resulting spherules are up to 2–3 mm in diameter and composed of troilite, pyrrhotite and metallic Fe. Nanometer-sized hollow carbon fibres and balls occur on the surface of the spherules. The features and coexisting relationships of the constituents of the spherules were studied by X-ray diffraction (XRD), energy-dispersive X-ray spectrometry (EDS), scanning electron microscopy (SEM) and transmission electron microscopy (TEM), and the phenomenon of transformation of pyrite (FeS2) into pyrrhotite (Fe1-xS), troilite (FeS) and metallic Fe under arc-discharge reducing conditions were examined.

Keywords

troilitepyrrhotitemetallic Fearc-discharge method
Type
Research Article
Information
Mineralogical Magazine , Volume 64 , Issue 1 , February 2000 , pp. 143 - 147
Copyright
Copyright © The Mineralogical Society of Great Britain and Ireland 2000

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References

Arnold, R.G. (1971) Evidence for liquid immiscibility in the system FeS–S. Econ. Geol., 66, 1121–30.CrossRefGoogle Scholar
Barker, W.W. & Parks, T.C. (1986) The thermodynamic properties of pyrrhotite and pyrite: a re-evaluation. Geochim Cosmochim. Acta, 50, 2185–94.CrossRefGoogle Scholar
Bayliss, P., Erd, D.C., Mrose, M.E., Sabina, A.P. and Smith, D.K. (1986) Mineral Powder Diffraction File Search Manual, JCPDS. International Center for Diffraction Data, U.S.A. Google Scholar
Fryt, E.M., Bhide, V.S., Smeltzer, W.W. and Kirkaldy, J.S. (1979) Growth of the iron sulfide (Fe1-x S) scale on iron at temperatures of 600-1000°C. J. Electrochem. Soc., 126, 683–8.CrossRefGoogle Scholar
Heide, F. and Wlotzka, F. (1995) Meteorites: Messengers From Space. Springer-Verlag, Berlin.CrossRefGoogle Scholar
Hiraharam, E. and Muakami, M. (1958) Magnetic and electrical anisotropies of iron sulfide single crystals. J. Phys. Chem. Solids, 7, 1–9.Google Scholar
Lauretta, D.S., Fegley, B. Jr., Lodders, K. and Kremser, D.T. (1996) The kinetics and mechanism of iron sulfide formation in the solar nebula. Proc. NIPR Symp. Antarct. Meteorites, 9, 111–26.Google Scholar
Pemberton, H. E. (1983) Minerals of California. Van Nostrand Reinhold Co., New York.Google Scholar
Rau, H. (1976) Energetics of defect formation and interaction in pyrrhotite Fe1-x S and its homogeneity range. J. Phys. Chem. Solids, 37, 425–9.CrossRefGoogle Scholar
Schwarz, E. J. and Vaughan, D. J. (1972) Magnetic phase relations of pyrrhotite. J. Geomag. Geoelec., 24, 441–58.CrossRefGoogle Scholar
Vaughan, D.J. and Craig, J.R. (1978) Mineral Chemistry of Metal Sulfides. (Cambridge University Press).Google Scholar
Wang, D.D. et al. (1993) An Introduction to Meteorites of China. Science Press, Beijing (in Chinese).Google Scholar
Willard, L.R., George, R.R. Jr. and Julius, W. (1974) Encyclopedia of Minerals. Van Nostrand Reinhold Co., New York.Google Scholar