IMPEDANCE SPECTRA OF THE AG-GE-ZEOLITE AG 3HGE7O16.4H2O AND ITS PYROLYSIS PRODUCTS AG2GE4O9 AND AG4GE9O20

Authors
BRODERSEN K SCHRENK J
Citation
K. Brodersen et J. Schrenk, IMPEDANCE SPECTRA OF THE AG-GE-ZEOLITE AG 3HGE7O16.4H2O AND ITS PYROLYSIS PRODUCTS AG2GE4O9 AND AG4GE9O20, Zeitschrift fur Naturforschung. B, A journal of chemical sciences, 48(8), 1993, pp. 1051-1056
Citations number
12
Categorie Soggetti
Chemistry Inorganic & Nuclear","Chemistry Inorganic & Nuclear
Journal title
Zeitschrift fur Naturforschung. B, A journal of chemical sciences → ACNP
ISSN journal
09320776
Volume
48
Issue
8
Year of publication
1993
Pages
1051 - 1056
Database
ISI
SICI code
0932-0776(1993)48:8<1051:ISOTAA>2.0.ZU;2-1
Abstract
The structures of the Ag-Ge-zeolite Ag3HGe7O16.4H2O and its pyrolyse p roducts Ag4Ge9O20 and Ag2Ge4O9 consist of a network of linked (GeO4)-t etraedra and (GeO6)-octahedra. In this network there exist free channe ls, which can be used as transport paths through the structure by Ag+- ions. Impedance spectroscopic measurements show the loss of weakly bon ded water at about 210-degrees-C and irreversible structural changes, which finally lead to the pyrolysis products. Lattice vibrations preve nt a better Ag+-mobility, so the high expectations concerning the cond uctance properties could not be fulfilled. In all cases the main part of the resistance could be attributed to the grain boundaries between the crystals.