Figure 2

Atomic structures derived from TEM images.

(a) Initial part of the amorphization (density deficit of 0.3%), showing a crystalline lattice with few isolated defects. (b) Nano-crystalline structure showing well isolated crystallites, separated by a vitreous network (deficit of 7.1%). (c) Random network structure with only a minority of crystallites at the end of the experiment (deficit of 16.7%). Pink areas denote non-hexagonal rings, violet denotes hexagonal rings that are surrounded by non-hexagonal ones, whereas white areas mark non-resolved structure (typically due to holes or adsorbates). All other colors denote separate crystallites. Crystallites are identified as any hexagonal area that contains at least an area of 3 × 3 hexagons and are considered as separate, if a connection is less than 3 unit cells wide. The scale bar is 2 nm. The supplementary information contains further details on how these maps were generated.