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  • 1 Institute of Geology and Mineralogy SB RAS, Pr. Ac. Koptyuga 3, Novosibirsk, Russia, 630090
  • | 2 Novosibirsk State University, Ul. Pirogova 2, Novosibirsk, Russia, 630090
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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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Journal of Thermal Analysis and Calorimetry
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