In: Geologica Carpathica Clays, vol. 1, no. 1
Jana Madejova - Peter Komadel - Blahoslav Cicel
Detaily:
Rok, strany: 1992, 9 - 12
O článku:
Infrared spectra of the <2µm fractions of eleven Czech and Slovak bentonites were analyzed. The sensitivity of OH vibrations to the nearest cationic environment was examined in the domain of stretching and bending vibrations. A shift of the absorption band near 3620 cm-1, ascribed to OH stretching vibrations, to lower frequencies with increasing octahedral Fe3+ for Al substitution was observed. Integrated intensities of the AlAlOH (near 920 cm-1) and Fe3+ AlOH (near 880 cm-1) bands were correlated with the coefficients of octahedral cations in the structural formulas calculated from chemical analysis (SFCA) and from acid dissolution data (SFAD). Analysis of variance gave significantly better values for correlation of SFAD coefficients and confirmed that SFAD show better than SFCA the real composition of smectites. Admixtures of amorphous silica were found in all, kaolinite and cristobalite in some of the samples.
Ako citovať:
ISO 690:
Madejova, J., Komadel, P., Cicel, B. 1992. INFRARED SPECTRA OF SOME CZECH AND SLOVAK SMECTITES AND THEIR CORRELATION WITH STRUCTURAL FORMULAS. In Geologica Carpathica Clays, vol. 1, no.1, pp. 9-12.
APA:
Madejova, J., Komadel, P., Cicel, B. (1992). INFRARED SPECTRA OF SOME CZECH AND SLOVAK SMECTITES AND THEIR CORRELATION WITH STRUCTURAL FORMULAS. Geologica Carpathica Clays, 1(1), 9-12.