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Chlorite layers interstratified in biotite from altered granite
Amorphousization of dickite by electron radiation
Stacking faults in sphalerite and formation of ZnO in TEM
AFM image to show the dissolution of brucite, Mg(OH)₂

Amorphousization of dickite by electron radiation

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Many silicates are so electron-beam-sensitive that HRTEM recording with sufficient resolution to determine their atomic structures is often difficult. Kaolin group minerals (KGMs), Al₂Si₂O₅(OH)₄, are among them. This movie shows the amorphousization of dickite, a polytype of KGMs, by beam radiation of 1×10^-16A/Å² (600 electrons/sec/Å²) which is typical intensity to record HRTEM images on films. In order to record HRTEM images of KGMs, TEM must be operated very quickly.
（TEM: JEOL JEM-2010 UHR at 200 kV. Camera: LHESA LH72LL. Sample preparation: ion-milling. ）

Kogure, T. and A. Inoue: "Determination of defect structures in kaolin minerals by High-Resolution Transmission Electron Microscopy (HRTEM) ", Am. Mineral., 90 (2005) 85-89. DOI: 10.2138/am.2005.1603