Microscopic analyses have shown that anisotropic inertinite is well fused and integrated in the coke matrix- it has reacted . Polished section of bituminous coal. In fluorescent mode, inertinite bodies display varying degrees of fluorescence intensity, with macrinite horizons marginally more intense than semifusinite and fusinite fragments. Inertodetrinite set in vitrinite groundmass. In fluorescent mode, exinite bodies fluoresce markedly.
Inertinite horizons display minimal fluorescence.
During carbonisation, reactive coal macerals pass through a fluid phase between approximately 360 -460 . Fluidisation begins at many places simulta neously with the formation of gas supported mesophase spheres within which clusters of carbon atoms link up to form anisotropic crystallites of graphitoid character. Technical corrections should be directed to the Geology Office .