Abstract
A Raman scattering and X-ray diffraction study of the thermal decomposition of a naturally occurring, ettringite-group crystal is presented. Raman spectra, recorded with increasing temperature, indicate that the thermal decomposition begins at ≈55 °C, accompanied by dehydration of water molecules from the mineral. This is in contrast to previous studies that reported higher temperature breakdown of ettringite. The dehydration is completed by 175 °C and this results in total collapse of the crystalline structure and the material becomes amorphous. The Raman scattering results are supported by X-ray diffraction results obtained at increasing temperatures.
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Received: 9 July 2001 / Accepted: 14 August 2002
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Deb, S., Manghnani, M., Ross, K. et al. Raman scattering and X-ray diffraction study of the thermal decomposition of an ettringite-group crystal. Phys Chem Minerals 30, 31–38 (2003). https://doi.org/10.1007/s00269-002-0279-x
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DOI: https://doi.org/10.1007/s00269-002-0279-x