Thibaud, Jean-Marc Rouquette, Jérôme Hermet, Patrick Dziubek, Kamil Gorelli, Federico A. Santoro, Mario Garbarino, Gaston Alabarse, Frederico G. Cambon, Olivier Renzo, Francesco Di van der Lee, Arie Haines, Julien High-Pressure Phase Transition, Pore Collapse, and Amorphization in the Siliceous 1D Zeolite, TON The siliceous zeolite TON with a 1-D pore system was studied at high pressure by X-ray diffraction, infrared spectroscopy, and DFT calculations. The behavior of this material was investigated using nonpenetrating pressure-transmitting media. Under these conditions, a phase transition from the <i>Cmc</i>2<sub>1</sub> to a <i>Pbn</i>2<sub>1</sub> structure occurs at close to 0.6 GPa with doubling of the primitive unit cell based on Rietveld refinements. The pores begin to collapse with a strong increase in their ellipticity. Upon decreasing the pressure below this value the initial structure was not recovered. DFT calculations indicate that the initial empty pore <i>Cmc</i>2<sub>1</sub> phase is dynamically unstable. Irreversible, progressive pressure-induced amorphization occurs upon further increases in pressure up to 21 GPa. These changes are confirmed in the mid- and far-infrared spectra by peak splitting at the <i>Cmc</i>2<sub>1</sub> to <i>Pbn</i>2<sub>1</sub> phase transition and strong peak broadening at high pressure due to amorphization. amorphization;nonpenetrating pressure-transmitting media;1- D pore system;pore Cmc 2 1 phase;Siliceous 1 D Zeolite;Cmc 2 1;GPa;High-Pressure Phase Transition;DFT calculations;Pbn 2 1 phase transition;siliceous zeolite TON;Pbn 2 1 structure 2017-02-13
    https://acs.figshare.com/articles/journal_contribution/High-Pressure_Phase_Transition_Pore_Collapse_and_Amorphization_in_the_Siliceous_1D_Zeolite_TON/4678849
10.1021/acs.jpcc.6b11594.s004