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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| Authors: | Fang Xia Jinwen Zhou Allan Pring Yung Ngothai Brian O&#;Neill Jo?l Brugger Guorong Chen and Chris Colby |
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| Institution: | (1) School of Chemical Engineering, University of Adelaide, Adelaide, SA, 5005, Australia;(2) Department of Mineralogy, South Australian Museum North Terrace, Adelaide, SA, 5000, Australia;(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 |
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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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| Keywords: | Pentlandite violarite replacement reaction pyrrhotite |
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