Collection of Czechoslovak Chemical Communications - digital archive 

Abstract

Raman polarization spectra of single crystal of natrolite Na₂Al₂Si₃O₁₀.2 H₂O have been measured in the region 4 000 to 50 cm^-1 at room temperature. The spectra have been measured in the conventional rectangular geometry. The found maxima of the polarization spectra of single crystal of the mineral investigated can be divided into four groups according to pertinence to individual vibrations: (i) translation and rotation vibrations of water molecules in interaction with the crystal lattice, (ii) internal vibrations of the bonds Al-O, Si-O inside the tetrahedrons, (iii) internal vibrations of bonds of the water molecules, (iv) external vibrations between the (Al,Si)O₄ tetrahedrons.