The mineral glauberite is one of many minerals formed in evaporite deposits. The mineral glauberite has been studied using a combination of scanning electron microscopy with energy dispersive X-ray analysis and infrared and Raman spectroscopy. Qualitative chemical analysis shows a homogeneous phase, composed by sulfur, calcium, and sodium. Glauberite is characterized by a very intense Raman band at 1002 cm−1 with Raman bands observed at 1107, 1141, 1156, and 1169 cm−1 attributed to the sulfate ν3 antisymmetric stretching vibration. Raman bands at 619, 636, 645, and 651 cm−1 are assigned to the ν4 sulfate bending modes. Raman bands at 454, 472, and 486 cm−1 are ascribed to the ν2 sulfate bending modes. The observation of multiple bands is attributed to the loss of symmetry of the sulfate anion. Raman spectroscopy is superior to infrared spectroscopy for the determination of glauberite.
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López et al. (2013) studied this question.
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