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 2<i>M</i><sub>1</sub>. 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<sup>−1</sup> and 104 cm<sup>−1</sup>) in the far-infrared spectra show that the untreated material was partly dehydroxylated. The strong decrease of the band at 93 cm<sup>−1</sup> and the occurrence of a band at 110 cm<sup>−1</sup> during the intercalation are strong hints about the rehydroxylation of the mineral. The strong increase of the band intensity at 88 cm<sup>−1</sup> and the occurrence of a band at 119 cm<sup>−1</sup> 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.
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