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Channel and column samples of the Herrin and Springfield coals, as well as roof shales, were collected from four underground coal mines in southern Illinois. Coal lithotypes (vitrain, bright banded coal, subbright banded coal, dull coal, and fusain) and mineral partings were hand-picked from the channel and column samples. Chemical, petrographic, and mineralogical studies of the samples indicate that the vitrain separates have the highest chlorine (CI; mean 0.52%) and lowest sodium (Na; mean 0.088%) and ash (mean 2.8% high-temperature ash) contents. Roof shale and mineral partings have the lowest CI content (mean 0.25%) and highest Na (mean 0.263%) and...

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