  Cooperative growth of the structure units (SUs) in a 14H type long-period
stacking ordered (LPSO) structure has been observed, and there is no obvious
accumulation of transformation strain at the growth fronts. The atomic
structures at this front are further characterized by Cs-corrected scanning
transmission electron microscopy, and the partial dislocations associated SUs
are uniquely defined based on the observations at different zone axes. It is
found that the Burgers vectors of neighbouring partials are alternatively
opposed so that the transformation strain is self-accommodated. Furthermore,
this self-accommodation mechanism is rationalized by the elastic interaction
energy for combinations of different partials.
