Spatial coal structure models

Spatial models of the structure of coal have been constructed. They are composed of planar models as defined in previous studies [Grigoriew (1988). J. Appl. Cryst. 21, 97-101, 102-105]. Agreement was reached between the model and the experimental P(r) functions. Moreover, there was no need to introduce the `non-organized carbon' proposed previously. The multiplication factor of turbostratic piles in anthracite was found to be between 2 and 3.