title: Raman spectroscopy as a tool to characterize heterogenite (CoO·OH) (Katanga Province, Democratic Republic of Congo).
abstract: Natural heterogenite (CoO·OH) samples were studied by Raman microspectroscopy, electronic microprobe and Electronic BackScattered Diffraction (EBSD). Raw samples and polished sections were made from 10 mines covering the Katanga copperbelt (Katanga Province, Democratic Republic of Congo). Four typical Raman responses have been obtained leading to investigate the laser-induced dehydroxylation of heterogenite into a Co-spinel structure. The results are also compared with EBSD patterns from oven heated heterogenite samples. A close relationship was established between the chemical substitutions of Co by mainly Cu, Ni, Mn and Al and their impact on the mineral Raman response.
authors.affiliation: Royal Belgian Institute for Natural Sciences, Geological Survey of Belgium, Brussels, Belgium. christian.burlet@naturalsciences.be
authors.forename: C
authors.initials: C
authors.lastname: Burlet
authors.forename: Y
authors.initials: Y
authors.lastname: Vanbrabant
authors.forename: H
authors.initials: H
authors.lastname: Goethals
authors.forename: T
authors.initials: T
authors.lastname: Thys
authors.forename: L
authors.initials: L
authors.lastname: Dupin
mesh_terms: D003223:Congo; D019015:Geologic Sediments / Q000737:chemistry*; D008903:Minerals / Q000032:analysis*; D013059:Spectrum Analysis, Raman / Q000379:methods*
chemical_list: D008903:Minerals