On the structure in carbon petrography
Abstract
"In the petrographic study of coals, one has to deal with a number of concepts and terms that change their meaning over time as science develops. Therefore, at each stage of the development of coal petrography, as in any other scientific field, there is a need to revise the terminology used, clarify concepts, and establish a connection between different groups of terms. Among the current issues of coal petrography that require clarification, one of the first is the issue of macro- and microstructure and their relationship. Then comes the issue of the relationship between structure and texture, which is sometimes understood in different ways. Next comes the issue of the material composition of coals and its relationship with structure and other factors. Finally, the most difficult problem arises in linking genetic concepts with structure and texture. To do this, it is necessary to consider these issues comprehensively, in their relationship and in development, since structural differences and material changes can be considered at different stages of the development of coal matter (brown coal - anthracite).
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