Relationship between the maximum and the random reflectance of vitrinite for coal from the Upper Silesian Coal Basin (Poland)

摘要

The relationship between the maximum and random reflectance of vitrinite, R_max and R_r, for Upper Silesian coal is presented by the equation: R_max=1.090R_r-0.052. When the random reflectance is higher than 0.90/100, the difference between R_max and R_r values becomes significant. R_max is a more precise rank indicator, the standard deviation is much smaller than the standard deviation of the random reflectance value, which is larger due to the optical anisotropy of vitrinite.