The dilatation properties of parent coals and their maceral fractions were examined. In all the coal samples, the main petrographic constituent was the vitrinite maceral. Reflectance of the vitrinite and inertinite macerals increased after carbonization, while the liptinite maceral disappeared and caused large pores in the vitrinite macerals. All of the coals developed anisotropic coke.
VAYİSOĞLU, Elif Sultan and ERBATUR, Nevin Gaye (1998) "Heat Treatment of Maceral Groups Obtained From Turkish Bituminous Coals," Turkish Journal of Chemistry: Vol. 22: No. 2, Article 1. Available at: https://journals.tubitak.gov.tr/chem/vol22/iss2/1