Raman spectroscopy of kassite, lucasite-(Ce), La analogue of lucasite, and cafetite

Abstract

Raman spectra of lucasite-(Ce), La-analogue of lucasite, kassite and cafetite are significantly different. Most evident differences were revealed in the position of bands corresponding to vibrational modes for bands assigned to symmetrical v1(Ti-O) and asymmetrical v3(O-Ti-O) stretching vibrations, as well as the bands determined by asymmetrical bending vibrations v4(transTiO6) and asymmetrical v3(O-Ti-O) stretching vibrations. Raman spectra of lucasite-(Ce) and La-analogue of lucasite are published for the first time. The presented data are valuable for the identification of cafetite and kassite group minerals using Raman spectroscopy.