State of the structural hydroxyl groups in minerals of the kaolinite group according to infrared spectroscopic data

Journal Article · Mon Jul 01 00:00:00 EDT 1985 · Theor. Exp. Chem. (Engl. Transl.); (United States)

DOI:https://doi.org/10.1007/BF00524314· OSTI ID:6090434

Tarasevich, Yu I; Gribina, I A

An interpretation of the IR spectra of kaolinite, dickite, and nacrite is proposed, based on the concept of resonance interaction of two intrasurface hydroxyl groups, and their manifestation in the spectrum as a split doublet ..delta..nu approx. 30 cm/sup -1/ and by the individual vibration of a third intrasurface OH-group. The structural identification of each band in the IR spectra of the kaolinite minerals is given. It was demonstrated that thermal dehydroxylation under vacuum of kaolinite occurred in two stages with activation energies of 43 and 84 kJ/mole. The activation energy of proton delocalization of structural hydroxyl groups of kaolinite has been evaluated (E approx. 13 kJ/mole). The contribution of the energy of the interlayer hydrogen bonds (..delta..H approx. 28 kJ/mole)to the total cohesion energy of adjoining layers of kaolinite (E/sub c/ approx. 165 kJ/mole) was calculated.

• Research Organization: A. V. Dumanskii Institute of Colloid Chemistry and Water Chemistry, Kiev, USSR
• OSTI ID: 6090434
• Journal Information: Theor. Exp. Chem. (Engl. Transl.); (United States), Vol. 21:1; Other Information: Translated from Teor. Eksp. Khim.; 21: No. 1, 73-81(Jan-Feb 1985)
• Country of Publication: United States
• Language: Russian

Related Subjects

37 INORGANIC
ORGANIC
PHYSICAL AND ANALYTICAL CHEMISTRY
HYDROXIDES
HYPERFINE STRUCTURE
VIBRATIONAL STATES
KAOLINITE
DEUTERATION
INFRARED SPECTRA
ISOTOPE EFFECTS
PYROLYSIS
ACTIVATION ENERGY
ANIONS
BINDING ENERGY
CONFIGURATION INTERACTION
DEUTERIUM COMPOUNDS
DIPOLE MOMENTS
ELECTRONIC STRUCTURE
HYDROGEN TRANSFER
ISOTOPIC EXCHANGE
MOLECULAR STRUCTURE
OSCILLATOR STRENGTHS
STRUCTURAL CHEMICAL ANALYSIS
ALUMINIUM COMPOUNDS
ALUMINIUM SILICATES
CHARGED PARTICLES
CHEMICAL REACTIONS
DECOMPOSITION
ENERGY
ENERGY LEVELS
EXCITED STATES
HYDROGEN COMPOUNDS
IONS
MINERALS
OXYGEN COMPOUNDS
SILICATE MINERALS
SILICATES
SILICON COMPOUNDS
SPECTRA
THERMOCHEMICAL PROCESSES
400201* - Chemical & Physicochemical Properties
400202 - Isotope Effects
Isotope Exchange
& Isotope Separation