A Fifth OH-Stretching Band in IR Spectra of Kaolinites

✍ Scribed by S. Shoval; S. Yariv; K.H. Michaelian; I. Lapides; M. Boudeuille; G. Panczer

• Publisher: Elsevier Science
• Year: 1999
• Tongue: English
• Weight: 90 KB
• Volume: 212
• Category: Article
• ISSN: 0021-9797
• DOI: 10.1006/jcis.1998.6055

✦ Synopsis

Transmission infrared spectra of different kaolinites were studied by curve fitting. These spectra generally exhibit four hydroxyl stretching bands. In this article we show that a fifth OH band (already identified in Raman and photoacoustic IR spectra of kaolinites) is also observed in transmission IR spectra of hydrothermal and authigenic kaolinites, which have a high degree of crystallinity. This additional band is weak or undetectable for kaolinites with a low degree of crystallinity. Copyright 1999 Academic Press.