Zorite is a microporous titanosilicate, with ideal chemical formula Na6Ti5Si12O36.11H2O, reported for the first time in the Lovozero massif. A synthetic zeolite-like titanosilicate, called ETS-4 was postulated as its synthetic counterpart. This chapter reports the comparison of the structural modifications, including the transient states, underwent by zorite and Na-ETS-4 when dynamically (continuously) heated. This goal was achieved by means of temperature-resolved in situ powder diffraction using synchrotron radiation and Rietveld refinement. In fact, this kind of time-resolved experiments allowed to study the structural modifications upon heating in the so-called ‘far-from-equilibrium’ conditions and provided a complementary view to results obtained in the ‘near-equilibrium’ approximation typically carried out ex situ.
Comparison of Structural Changes upon Heating of Zorite and Na-ETS-4 by In Situ Synchrotron Powder Diffraction
SACERDOTI, Michele;CRUCIANI, Giuseppe
2011
Abstract
Zorite is a microporous titanosilicate, with ideal chemical formula Na6Ti5Si12O36.11H2O, reported for the first time in the Lovozero massif. A synthetic zeolite-like titanosilicate, called ETS-4 was postulated as its synthetic counterpart. This chapter reports the comparison of the structural modifications, including the transient states, underwent by zorite and Na-ETS-4 when dynamically (continuously) heated. This goal was achieved by means of temperature-resolved in situ powder diffraction using synchrotron radiation and Rietveld refinement. In fact, this kind of time-resolved experiments allowed to study the structural modifications upon heating in the so-called ‘far-from-equilibrium’ conditions and provided a complementary view to results obtained in the ‘near-equilibrium’ approximation typically carried out ex situ.I documenti in SFERA sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
