Micro-Raman Spectroscopy of Selected Macerals of the Huminite Group: An Example from the Szczercow Lignite Deposit (Central Poland)

Lignite (ulminite reflectance Rr = 0.27%) from the Szczercow deposit (Central Poland) is dominated by huminite group macerals, containing a high proportion of attrinite and densinite. Densinite and ulminite are more abundant in small aromatic units than attrinite, which may result from their stronger gelification. The differences in Raman spectral characteristics between attrinite and ulminite are more pronounced than between attrinite and densinite. Fusinite, in comparison with the huminite group macerals, is composed of larger, more varied aromatic systems. The D4 (1190-1200 cm(-1)) and D5 bands (1280-1290 cm(-1)), most likely, correspond to different chemical structures, and their origin should be further investigated.

Automated summary

Lignite from the Szczercow deposit in Central Poland is dominated by huminite group macerals, with a high proportion of attrinite and densinite. The differences in Raman spectral characteristics between attrinite and ulminite are more pronounced, and fusinite is composed of larger, more varied aromatic systems. Further investigation is needed to determine the origin of the D4 and D5 bands' different chemical structures.