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Mineralogy and chemistry of Fe-rich bentonite from the Lieskovec deposit (Central Slovakia)

In: Geologica Carpathica, vol. 57, no. 5
Slavka Andrejkovicova - Jana Madejova - Adriana Czimerova - Igor Galko - Reiner Dohrmann - Peter Komadel

Details:

Year, pages: 2006, 371 - 378
About article:
Powder X-ray diffraction and infrared spectroscopy were used to identify the mineralogical composition of clay obtained from a systematically sampled bentonite deposit at Lieskovec (Central Slovakia), developed from andesitic pyroclastics. The main mineral is an iron-rich montmorillonite, the admixtures present in all samples include kaolinite, quartz, cristobalite and plagioclase, while muscovite/illite and orthoclase appear in most samples. This bentonite deposit is relatively homogeneous as is demonstrated by its chemical composition and quantitative analysis using Rietveld refinement. Total Fe2O3 content (5–9 %) in the Lieskovec samples is higher than in most other Slovak bentonites. Mössbauer spectroscopy shows that Fe(II) covers less than 5 % of total Fe. Goethite and/or hematite are not present in all <2 mm fractions separated from the raw bentonite and they contain up to 26 % of total Fe. Low tetrahedral Al and octahedral Mg substitutions cause that the smectite is of lower charge than montmorillonite separated from the best known Slovak bentonite: Stara Kremnicka-Jelsovy potok. This is in accord with the absence of the AlMgOH bending vibration in the IR spectra of Lieskovec samples.
How to cite:
ISO 690:
Andrejkovicova, S., Madejova, J., Czimerova, A., Galko, I., Dohrmann, R., Komadel, P. 2006. Mineralogy and chemistry of Fe-rich bentonite from the Lieskovec deposit (Central Slovakia). In Geologica Carpathica, vol. 57, no.5, pp. 371-378. 1335-0552.

APA:
Andrejkovicova, S., Madejova, J., Czimerova, A., Galko, I., Dohrmann, R., Komadel, P. (2006). Mineralogy and chemistry of Fe-rich bentonite from the Lieskovec deposit (Central Slovakia). Geologica Carpathica, 57(5), 371-378. 1335-0552.