Abstract
The mineral pectolite NaCa2Si3O8(OH) is a crystalline sodium calcium silicate which has the potential to be used in plaster boards and in other industrial applications.Raman bands at 974 and 1026cm−1 are assigned to the SiO stretching vibrations of linked units of Si3O8 units. Raman bands at 974 and 998cm−1 serve to identify Si3O8 units. The broad Raman band at around 936cm−1 is attributed to hydroxyl deformation modes. Intense Raman band at 653cm−1 is assigned to OSiO bending vibration. Intense Raman bands in the 2700–3000cm−1 spectral range are assigned to OH stretching vibrations of the OH units in pectolite. Infrared spectra are in harmony with the Raman spectra. Raman spectroscopy with complimentary infrared spectroscopy enables the characterisation of the silicate mineral pectolite.
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