Figure 3
From: Natural glass alteration under a hyperalkaline condition for about 4000 years
Electron microscope images of altered glass surface. (a) The white rectangle denotes micro-sampling position by focused ion beam. (b–d) Bright-field TEM images showing the glass surface and secondary minerals. (e) The selected area electron diffraction pattern obtained from an aggregate of spherical particles; the lower-right side is inversed in contrast. Diffused rings correspond to ~ 4.2 and 2.0 Å. (f,g) High-angle annular dark-field (HAADF) images.
