Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
1232544 | Spectrochimica Acta Part A: Molecular and Biomolecular Spectroscopy | 2010 | 4 Pages |
Raman spectra of mineral peretaite Ca(SbO)4(OH)2(SO4)2·2H2O were studied, and related to the structure of the mineral. Raman bands observed at 978 and 980 cm−1 and a series of overlapping bands observed at 1060, 1092, 1115, 1142 and 1152 cm−1 are assigned to the SO42−ν1 symmetric and ν3 antisymmetric stretching modes. Raman bands at 589 and 595 cm−1 are attributed to the SbO symmetric stretching vibrations. The low intensity Raman bands at 650 and 710 cm−1 may be attributed to SbO antisymmetric stretching modes. Raman bands at 610 cm−1 and at 417, 434 and 482 cm−1 are assigned to the SO42−ν4 and ν2 bending modes, respectively. Raman bands at 337 and 373 cm−1 are assigned to O–Sb–O bending modes. Multiple Raman bands for both SO42− and SbO stretching vibrations support the concept of the non-equivalence of these units in the peretaite structure.