Abstract
The petrographic composition of fractions of density 1.40–1.45 g/cm3 from coal of different metamorphic development is studied. In terms of their petrographic composition, these fractions are mainly of two-component type, and the inertinite group is dominant. Visual analysis of polished samples reveals their maceral composition: the vitrinite group is represented mainly by telocollinite, desmocollinite, and telinite. The macerals of the inertinite group are fusinite, semifusinite, and sclerotinite. In some samples, fusinite with a somewhat intact cell structure is observed.
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