Figure 13 : TEM observation of a grain boundary with a misorientation of 33°.

From: Bulk Crystallization in a SiO2/Al2O3/Y2O3/AlF3/B2O3/Na2O Glass: Fivefold Pseudo Symmetry due to Monoclinic Growth in a Glassy Matrix Containing Growth Barriers

Figure 13

HRTEM image with corresponding FFT diffractograms (ad) compared to an ideal twin relationship based on a rotation of 30° (e).