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DOI: 10.5445/KSP/1000003440
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Spectroscopic investigations of delaminated and intercalated phyllosilicates

Friedrich, Frank

The characteristic feature of phyllosilicates like muscovite (KAl2[Si3AlO10(OH)2] is their layered structure. Due to the resulting anisotropic optical and electrical properties this mineral is an important raw material in paint industries and polymer composites.
Crucial for many of these properties is on one hand a high aspect ratio of the stacks, which will be enhanced by delamination of the mineral. On the other hand the exchange of the interlayer cations like potassium changes the chemical properties of the muscovite, its refraction behaviour and surface properties. But these interlayer cations are difficult to access and are not exchangeable under normal conditions.
Thus a process for the intercalation of cations like Cu2+, Mg2+ or Zn2+ from super saturated nitrate solutions in autoclaves was developed to reveal a chemically modified mica phase.
The extensive modification of the muscovite structure, due to the intercalation is monitored by X-ray diffractometry and several spectroscopic methods. The XRD results strongly suggest the formation of an intercalated irregular mixed-layer phase. This is proven by far infrared spectro ... mehr

Zugehörige Institution(en) am KIT Fakultät für Bauingenieur-, Geo- und Umweltwissenschaften (BGU)
Publikationstyp Hochschulschrift
Jahr 2005
Sprache Englisch
Identifikator ISBN: 3-937300-58-9
ISSN: 1618-2677
URN: urn:nbn:de:0072-34402
KITopen-ID: 1000003440
Verlag Universitätsverlag Karlsruhe, Karlsruhe
Umfang VIII, 150 S.
Serie Karlsruher Mineralogische und Geochemische Hefte ; 27
Abschlussart Dissertation
Fakultät Fakultät für Bauingenieur-, Geo- und Umweltwissenschaften (BGU)
Prüfungsdaten 15.09.2004
Referent/Betreuer Prof. R. Nüesch
Schlagworte Phyllosilicate , Spektroskopie , Delamination , Interkalation
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