Synthesis and characterization of new sodalites, cancrinites and their intermediate phase
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Sonstige Titel: | Synthese und Charakterisierung von neuen Sodalithen, Cancrinithen sowie deren Intermediären Phase | Autor/Autorin: | Petersen, Hilke | BetreuerIn: | Gesing, Thorsten M. | 1. GutachterIn: | Buhl, Josef-Christian | Weitere Gutachter:innen: | Depmeier, Wulf | Zusammenfassung: | The thermal behavior and occuring phase transitions of three sodalites, a permanganate-, a perrhenate and a mixed permanganate/perrhenate-sodalite are investigated. Below 300 K a loss of dynamic motion of the templating anions could be observed, causing a phase transition of perrhenate-sodalite. At elevated temperatures all sodalites show a phase transition to the fully expanded structure (P-43n to Pm-3n). At 900 K the permangante-sodalite shows a second phase transition to P23.Further a comprehensive study on cancrinites containing different divalent tetrahedral coordinated anions (XO4 2-; X = Mn, Cr, Se, Mo, W) and their effect on the thermal behavior is performed. Thirdly, a structural investigation of the one-dimensional disordered Intermediate phase is carried out. By correlating the lattice parameter c with the existing zeolite-cages and the chemical composition of the sample the structure of the intermediate phase could be modeled. |
Schlagwort: | Sodalites; Cancrinites; Intermediate Phase; temperature-dependent behavior; phase transitions; structural investigation | Veröffentlichungsdatum: | 19-Nov-2018 | Dokumenttyp: | Dissertation | Zweitveröffentlichung: | no | URN: | urn:nbn:de:gbv:46-00106998-13 | Institution: | Universität Bremen | Fachbereich: | Fachbereich 02: Biologie/Chemie (FB 02) |
Enthalten in den Sammlungen: | Dissertationen |
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