Structural multiplicity observed at a Σ = 5/[001] 53·1° tilt boundary in gold

Using high-resolution transmission electron microscopy the observation of two different metastable structures at a Σ = 5/[001]53·1° (210) symmetrical tilt boundary are reported upon. A structural unit approach is used to describe the differences between these structures. The results are consistent with computer simulation studies where a small difference in minimum energy states was previously reported. © 1991 Taylor & Francis Group, LLC.