The characteristic frequencies of the raman and infrared spectra of the fergusonite and aeschynite group minerals , monazites and the rare earth fluoro - carbonate minerals have been determined and assigned ( 3 )变生态矿物拉曼光谱的强度很弱、谱线宽而弥散，而退火晶态矿物的拉曼谱峰强而尖锐。
