Study of the complex vibrational spectra of natural mesolite

• Published in: Crystal Research and Technology
• Main Author: Pechar, F.
• Format: Article in Journal/Newspaper
• Language: English
• Published: Wiley 1983
• Subjects: Akureyri
• Online Access: http://dx.doi.org/10.1002/crat.2170180812; https://api.wiley.com/onlinelibrary/tdm/v1/articles/10.1002%2Fcrat.2170180812; https://onlinelibrary.wiley.com/doi/pdf/10.1002/crat.2170180812

Abstract The vibrational spectra of the natural zeolite, mesolite (locality Akureyri‐Island) were measured in the infrared (200—400 cm −1 ) and the far infrared — FIR (40—400 cm −1 ) regions: the infrared reflectance (200—1400 cm −1 ) and Raman scattering (50—3600 cm −1 ) spectra of the polycrystalline material were also measured. The Schimanouchi GCCC, BGLZ, and LSMA programs were used to calculate the force constants and vibrational frequencies of the SiO, AlO, OH, cation‐oxygen, OSiO, OAlO, HOH bonds and libration of H 2 O and Si(Al)OSi on the basis of the symmetry coordinates. The KKK‐1 program (Petzelt, Kroupa) was used to calculate the dispersion curves of the complex refractive index for both parts of the complex dielectric permittivity in the whole measured wavenumber region. The bands in the spectra were assigned to the vibrations of the individual bonds and structural groups of the mesolite on the basis of theoretical calculations.