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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: [email protected]
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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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