ResearchOnline at James Cook University (James Cook University) · 2009 · 65 citations · 16 references
Natural SciencesChemistryEarth SciencesGeochemistrySpectroscopic AnalysisSpectroscopyInorganic SpectroscopyPhysical Properties Of MineralsRaman SpectroscopySulfate MineralsVibrational SpectroscopyVibrational StructureMolecular Vibrational ModesRaman SpectraRaman Spectral AssignmentRaman Spectral InterpretationSulfate Mineral SpectroscopyVibrational Mode AnalysisVibrational Mode AssignmentVibrational Modes
Some of the most common sulfates have been investigated by non-contact Raman spectrography. For barite and anhydrite group the vibrational mode ν1 decreseas as the atomic mass increseas.The Raman spectrum of chalcocyanite shows two strong bands at 1013 cm-1 and 1045 cm-1 interpreted as ν1 modes. The bands at 423 cm-1, 448 cm-1, 480 cm-1 and 514 cm-1 have been assigned to the ν2 sulfate mode, the bands at 1101 cm-1 and 1205 cm-1 to the ν3 vibrational modes and the bands at 622 cm-1 and 670 cm-1 to the ν4 mode of SO4. The bands at 250 cm-1, 269 cm-1 and 347 cm-1 have been interpreted as vibrations of Cu-O bonds. Szmikite shows intense vibrations at1021 cm-1 interpreted as ν1 mode of SO4. The ν2 and ν3 modes the bands are at 425 cm-1 and 493 cm-1 respectively 1089 cm-1 and 1189 cm-1. The bands at 623 cm-1 and 654 cm-1 were assigned to the ν4 mode. The translational mode T(H2O, Mn) was determined at 263 cm-1.
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