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  • Title: A Raman spectroscopic study of the antimonite mineral peretaite Ca(SbO)(4)(OH)(2)(SO(4))(2).2H(2)O.
    Author: Frost RL, Keeffe EC, Bahfenne S.
    Journal: Spectrochim Acta A Mol Biomol Spectrosc; 2010 May; 75(5):1476-9. PubMed ID: 20226725.
    Abstract:
    Raman spectra of mineral peretaite Ca(SbO)(4)(OH)(2)(SO(4))(2).2H(2)O were studied, and related to the structure of the mineral. Raman bands observed at 978 and 980cm(-1) and a series of overlapping bands observed at 1060, 1092, 1115, 1142 and 1152cm(-1) are assigned to the SO(4)(2-)nu(1) symmetric and nu(3) antisymmetric stretching modes. Raman bands at 589 and 595cm(-1) are attributed to the SbO symmetric stretching vibrations. The low intensity Raman bands at 650 and 710cm(-1) may be attributed to SbO antisymmetric stretching modes. Raman bands at 610cm(-1) and at 417, 434 and 482cm(-1) are assigned to the SO(4)(2-)nu(4) and nu(2) bending modes, respectively. Raman bands at 337 and 373cm(-1) are assigned to O-Sb-O bending modes. Multiple Raman bands for both SO(4)(2-) and SbO stretching vibrations support the concept of the non-equivalence of these units in the peretaite structure.
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