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The role of pyrrhotite (Fe7S8) and the sample texture in the hydrothermal transformation of pentlandite ((Fe,Ni)9S8) to violarite ((Ni,Fe)3S4)

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Abstract

The catalytic role of pyrrhotite (Fe7S8) in the reaction kinetics of the hydrothermal transformation of pentlandite ((Fe,Ni)9S8) to violarite ((FeNi2S4) was found to depend on the physical form of pyrrhotite. Pyrrhotite in fine scale intergrown with pentlandite boosts the reaction, whereas in a mechanical mixture of pyrrhotite and pentlandite, it plays the opposite role. This phenomenon was interpreted as result of dissolution of pyrrhotite under reaction conditions.

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Authors and Affiliations

  1. School of Chemical Engineering, University of Adelaide, Adelaide, SA, 5005, Australia

    Fang Xia, Yung Ngothai, Brian O’Neill & Chris Colby

  2. Department of Mineralogy, South Australian Museum North Terrace, Adelaide, SA, 5000, Australia

    Jinwen Zhou, Allan Pring & Joël Brugger

  3. Key Laboratory for Ultrafine Materials of Ministry of Education, School of Materials Science and Engineering, East China University of Science and Technology, 130 Meilong Rd., Shanghai, 200237, China

    Guorong Chen

Authors
  1. Fang Xia
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  2. Jinwen Zhou
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  3. Allan Pring
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  4. Yung Ngothai
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  5. Brian O’Neill
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  6. Joël Brugger
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  7. Guorong Chen
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  8. Chris Colby
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Correspondence to Allan Pring.

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Xia, F., Zhou, J., Pring, A. et al. The role of pyrrhotite (Fe7S8) and the sample texture in the hydrothermal transformation of pentlandite ((Fe,Ni)9S8) to violarite ((Ni,Fe)3S4). React Kinet Catal Lett 92, 257–266 (2007). https://doi.org/10.1007/s11144-007-5197-y

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  • DOI: https://doi.org/10.1007/s11144-007-5197-y

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