Transmission electron microscopy and microdiffraction have been used to investigate nanothin spatial dissipative structures (SDS) obtained by thermogradient processing of an amorphous selenium film by one-sided heating of its lower surface at T = 413 K. It has been established that the obtained nanothin SDS of hexagonal selenium possess a specific curved habit and a nonlinear fan-shaped system of bending contours in their electron-microscopic image; the lattice of nanothin SDS undergoes an elastic-plastic rotational curvature around three mutually perpendicular directions; the lattice rotation angles of nanothin SDS hexagonal selenium reach: around [001], 25º, around the direction perpendicular to [001] and lying in the plane of the amorphous film 32º, around the direction perpendicular to the first two and not lying in the plane of the amorphous film 35º.