title: Far-infrared spectroscopy of interlayer vibrations of Cu(II), Mg(II), Zn(II), and Al(III) intercalated muscovite.
abstract: In this study the intercalation behavior of di- and trivalent cations like Cu(II), Mg(II), Zn(II), and Al(III) into the interlayers of muscovite was investigated by X-ray diffraction and far-infrared spectroscopy. The X-ray diffractometry shows that the original material is a muscovite 2M(1). During the metal cation treatment, new peaks occur at about 1.1 and 2.2 nm, while the original peaks strongly decrease. This gives evidence for the formation of a strongly modified mica structure. The occurrence of bands at low wavenumbers (93 cm(-1) and 104 cm(-1)) in the far-infrared spectra show that the untreated material was partly dehydroxylated. The strong decrease of the band at 93 cm(-1) and the occurrence of a band at 110 cm(-1) during the intercalation are strong hints about the rehydroxylation of the mineral. The strong increase of the band intensity at 88 cm(-1) and the occurrence of a band at 119 cm(-1) in the treated muscovites prove the formation of a new, strongly modified mica phase that has both the new cations and the potassium incorporated into the interlayer space.
authors.affiliation: Institute for Technical Chemistry, Department of Water- and Geotechnology, Forschungszentrum Karlsruhe GmbH, Hermann-von-Helmholtz-Platz 1, D-76344 Eggenstein-Leopoldshafen, Germany. frank.friedrich@itc-wgt.fzk.de
authors.forename: Frank
authors.initials: F
authors.lastname: Friedrich
authors.forename: Biliana
authors.initials: B
authors.lastname: Gasharova
authors.forename: Yves-Laurent
authors.initials: YL
authors.lastname: Mathis
authors.forename: Rolf
authors.initials: R
authors.lastname: Nüesch
authors.forename: Peter G
authors.initials: PG
authors.lastname: Weidler