Disclinations and disconnections in minerals and metals.
John P HirthGreg HirthJian WangPublished in: Proceedings of the National Academy of Sciences of the United States of America (2019)
A different type of defect, the coherency disclination, is added to disclination types. Disconnections that include disclination content are considered. A criterion is suggested to distinguish disconnections with dislocation content from those with disclination content. Electron microscopy reveals unit disconnections in a low albite grain boundary, defects important in grain boundary sliding. Disconnections of varying step heights are displayed and shown to define both deformed and recovered structures.