  New aspects of a relation between lattice and dislocation structures are
examined within a physically transparent theoretical scheme. Predicted features
originating from the lattice discreteness include: (i) multiple core
dislocation structures and (ii) their dependence on the position of the
dislocation axis. These effects, which in principle can be observed directly
and may also manifest themselves in dislocation motion or/and transformation
(cross-slip) characteristics, are very general and present in any crystal in
which they may be more or less pronounced depending on the material.
