Fig. 4
From: A three-dimensional polyhedral unit model for grain boundary structure in fcc metals
The polyhedral unit model of the Σ11\((1\,\bar{1}\,3)\) GB is illustrated. a, b The atomistic structure and the polyhedral units (capped trigonal prisms) of the symmetric-tilt GB, along the tilt axis \([\bar{1}\,\bar{1}\,0]\) and the plane normal \([1\,\bar{1}\,3]\), are shown. The CTP corresponding to the smallest asymmetric unit (the unit-cell) is highlighted. c The CTP and the overlapping VV-spheres (Bernal holes), along with the clusters of atoms that correspond to the CTP, are shown. Also illustrated is a comparison between the observed and a perfect CTP unit
