Abstract
Thermal dehydration of stilbite was investigated by thermogravimetry and in situ X-ray powder diffraction. Sample mass changes continuously over the whole temperature range, with anomaly near 175 °C described in terms of the second-order phase transition with changes in symmetry from F-centered unit cell to A-centered one. This contradicts to the step-wise change in sample mass and the first-order phase transition with symmetry changing from F2/m to Amma reported in literature. The change in the order of the phase transition by means of the changes in experimental techniques is discussed.
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This work was supported by the Russian Foundation for Basic Research (grant # 10–05–00483).
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Drebushchak, V.A., Dementiev, S.N. & Seryotkin, Y.V. Phase transition at thermal dehydration in stilbite. J Therm Anal Calorim 107, 1293–1299 (2012). https://doi.org/10.1007/s10973-011-1608-4
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DOI: https://doi.org/10.1007/s10973-011-1608-4