The surface properties of bornite.

D. J. Vaughan; J. A. Tossell; C. J. Stanley

doi:10.1180/minmag.1987.051.360.11

The surface properties of bornite.

D. J. Vaughan, J. A. Tossell, C. J. Stanley

Earth and Environmental Sciences - Academic & Research

Aston University

Research output: Contribution to journal › Article › peer-review

Abstract

The surfaces of fresh and tarnished bornite (Cu₅FeS₄) have been studied by measurement of reflectance and quantitative colour parameters in the visible region, X-ray photoelectron and Auger electron spectroscopy, and conversion electron Mossbauer spectroscopy. The tarnish is shown to be due to a surface coating of an iron hydroxy-oxide, leaving beneath it a layer with a copper sulphide composition, possibly due to metals in trigonal planar coordination resulting in destabilization of Fe³⁺ relative to Cu⁺, thus accounting for its preferential oxidation. -R.A.H.

Original language	English
Pages (from-to)	285-293
Number of pages	9
Journal	Mineralogical Magazine
Volume	51
Issue number	2
DOIs	https://doi.org/10.1180/minmag.1987.051.360.11
Publication status	Published - 1987

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AB - The surfaces of fresh and tarnished bornite (Cu5FeS4) have been studied by measurement of reflectance and quantitative colour parameters in the visible region, X-ray photoelectron and Auger electron spectroscopy, and conversion electron Mossbauer spectroscopy. The tarnish is shown to be due to a surface coating of an iron hydroxy-oxide, leaving beneath it a layer with a copper sulphide composition, possibly due to metals in trigonal planar coordination resulting in destabilization of Fe3+ relative to Cu+, thus accounting for its preferential oxidation. -R.A.H.

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The surface properties of bornite.

Abstract

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