Cross sections of (111) AgBrI platelets have been examined by low- and high-resolution transmission electron microscopy. They provide direct microstructural evidence for stacking fault arrangement between the internal twin boundary and the external grain surface. Their orientation relationship also provides insight into how (111) and (100) surfaces can coexist at the tabular-grain surface.
Samuel Chen, S. Jagannathan, R. V. Mehta, R. Jagannathan, A. E. Taddei, "Direct Observation of Stacking Fault Structure in (111) Tabular Silver Halide Grains by High-Resolution Electron Microscopy" in Journal of Imaging Science and Technology, 1998, pp 399 - 401, https://doi.org/10.2352/J.ImagingSci.Technol.1998.42.5.art00006