The role of pyrrhotite (Fe 7 S 8 ) and the sample texture in the hydrothermal transformation of pentlandite ((Fe,Ni) 9 S 8 ) to violarite ((Ni,Fe) 3 S 4 )

Fang Xia, Jinwen Zhou, Allan Pring, Yung Ngothai, Brian O'Neill, Joël Brugger, Guorong Chen, Chris Colby

Research output: Contribution to journalArticlepeer-review

19 Citations (Scopus)

Abstract

The catalytic role of pyrrhotite (Fe 7 S 8 ) in the reaction kinetics of the hydrothermal transformation of pentlandite ((Fe,Ni) 9 S 8 ) to violarite ((FeNi 2 S 4 ) 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.

Original languageEnglish
Pages (from-to)257-266
Number of pages10
JournalReaction Kinetics and Catalysis Letters
Volume92
Issue number2
DOIs
Publication statusPublished - 29 Nov 2007
Externally publishedYes

Keywords

  • Pentlandite
  • Pyrrhotite
  • Replacement reaction
  • Violarite

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