Assertion: chalcopyrite | /r/HasProperty | cuiifeii
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Source sentences:
text: Metal L 2,3 , sulfur K and oxygen K near-edge X-ray absorption fine structure (NEXAFS) spectra for chalcopyrite, bornite, chalcocite, covellite, pyrrhotite and pyrite have been determined from single-piece natural mineral specimens in order to assess claims that chalcopyrite should be regarded as CuIIFeIIS 2 rather than CuIFeIIIS 2 , and that copper oxide species are the principal initial oxidation products on chalcopyrite and bornite exposed to air.