A series of pyrocarbons, vapodeposited then heat treated from 1700-deg
rees-C up to 2800-degrees-C, was structurally characterized. Interlaye
r distances and mosaic spreads were measured. By analysis of the 101 a
nd 111 bands, the graphitization rate, the domain sizes, and the graph
itization process were determined. The methods, ab-initio calculations
and phenomenological analyses are compared, and the physical meaning
of some parameters are ascertained. The results are correlated to diff
erent types of disorder, used in the interpretation of transport prope
rties.