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Figure 5 | Earth, Planets and Space

Figure 5

From: Subgrain boundary analyses in deformed orthopyroxene by TEM/STEM with EBSD-FIB sample preparation technique

Figure 5

HRTEM images of SGBs in Opx, recorded along the b -axis. The figures under the images indicate the misorientation (rotation) angles about the b-axis. (a) Bright-field image of a small-angle SGB with periodic dislocation array. (b) HRTEM image of single dislocation in (a), which dissociates into two partial dislocations as indicated with the arrowheads. Note the different periodicity of the h 00 lattice fringes at the region between the partial dislocations compared to those in the surrounding Opx. (c) HRTEM image of a SGB with a misorientation angle of 7°. The white arrows point the regions where the lattice fringes are obscure, corresponding to dislocation cores. (d) HRTEM image of a SGB with a misorientation angle of 21°, indicating the completely disconnected Opx structure across the boundary.

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