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  4. Synthesis and characterization of new sodalites, cancrinites and their intermediate phase
 
Zitierlink URN
https://nbn-resolving.de/urn:nbn:de:gbv:46-00106998-13

Synthesis and characterization of new sodalites, cancrinites and their intermediate phase

Veröffentlichungsdatum
2018-11-19
Autoren
Petersen, Hilke  
Betreuer
Gesing, Thorsten M.  
Gutachter
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.
Schlagwörter
Sodalites

; 

Cancrinites

; 

Intermediate Phase

; 

temperature-dependent behavior

; 

phase transitions

; 

structural investigation
Institution
Universität Bremen  
Fachbereich
Fachbereich 02: Biologie/Chemie (FB 02)  
Dokumenttyp
Dissertation
Zweitveröffentlichung
Nein
Sprache
Englisch
Dateien
Lade...
Vorschaubild
Name

00106998-1.pdf

Size

10.74 MB

Format

Adobe PDF

Checksum

(MD5):059601520ab89c09b0d5e81537b82d51

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