New powder X-ray data for cancrinite (ideally Na8Si6Al6O24(CO3)2 . 2 H2O) are reported along with in-situ real-time thermal processes recorded using energy dispersive X-ray diffractometry (EDXD). A completely anhydrous phase is obtained after heating the sample up to 600°C and quickly cooling it to room temperature, as shown by means of both Rietveld analysis and IR spectroscopy. The anhydrous phase does not show any tendency to re-acquire molecular water. During the heating process, at around 450°C, a peak splitting is observed, possibly due to a reversible phase transition.
Carbonate-cancrinite: In-situ real-time thermal processes studied by means of energy-dispersive X-ray powder-diffractometry / Ballirano, Paolo; Maras, Adriana; Caminiti, Ruggero; Sadun, Claudia. - In: POWDER DIFFRACTION. - ISSN 0885-7156. - STAMPA. - 10:3(1995), pp. 173-177.
Carbonate-cancrinite: In-situ real-time thermal processes studied by means of energy-dispersive X-ray powder-diffractometry
BALLIRANO, Paolo;MARAS, Adriana;CAMINITI, Ruggero;SADUN, Claudia
1995
Abstract
New powder X-ray data for cancrinite (ideally Na8Si6Al6O24(CO3)2 . 2 H2O) are reported along with in-situ real-time thermal processes recorded using energy dispersive X-ray diffractometry (EDXD). A completely anhydrous phase is obtained after heating the sample up to 600°C and quickly cooling it to room temperature, as shown by means of both Rietveld analysis and IR spectroscopy. The anhydrous phase does not show any tendency to re-acquire molecular water. During the heating process, at around 450°C, a peak splitting is observed, possibly due to a reversible phase transition.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
