Examination of the proposition that Cu(II) can be required for charge neutrality in a sulfide lattice--Cu in tetrahedrites and sphalerite (1).(Report)

Canadian Journal of Chemistry | October 1, 2007| | Copyright

Abstract: Synchrotron XPS and Cu [L.sub.2,3]-edge NEXAFS spectroscopic data for a natural tetrahedrite surface prepared by fracture under UHV were in accord with the composition of the mineral and its expected semiconductivity. The 2p binding energy for the 6-coordinate S atoms was found to be not detectably greater than that for the 4-coordinate S atoms, and surface species were not clearly discernible in either surface-optimized S 2p or Cu 2p spectra. The Cu 2p and Cu [L.sub.2,3]-edge spectra indicated that all Cu in the mineral was indisputably Cu(I). The Cu ...

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