Sulfur species at chalcopyrite (CuFeS2) fracture surfaces

Sarah L. Harmer, Allen R. Pratt, Wayne H. Nesbitt, Michael E. Fleet

Research output: Contribution to journalArticlepeer-review

69 Citations (Scopus)

Abstract

Pristine fractured surfaces of chalcopyrite (CuFeS2) have been studied using Synchrotron Radiation X-ray Photoelectron Spectroscopy and conventional X-ray Photoelectron Spectroscopy. These high-resolution spectra reveal for the first time three distinct contributions to the S 2p spectrum. The main symmetric peak is located at 161.33 eV and is likely derived from fully coordinated bulk S atoms. A core-level shifted peak was observed at 160.84 eV and is attributed to surface monomeric species (S2-). A second broad contribution at 161.88 eV likely represents surface polymeric species (Sn2-). The data suggest that surface polymers form where S-terminated surfaces such as the (1̄11) plane are exposed during fracture.

Original languageEnglish
Pages (from-to)1026-1032
Number of pages7
JournalAmerican Mineralogist
Volume89
Issue number7
DOIs
Publication statusPublished - Jul 2004
Externally publishedYes

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