Electron channeling phenomena in electron microscopes are under the spotlight. The determination of site occupancies of select atoms in mineral structures is one of the most intriguing targets in mineralogy. The current extension of electron channeling spectroscopies using a transmission electron microscope (TEM) can provide the site occupancies of particular elements from a sub-micrometer area (Muto and Ohtsuka 2017). High angular resolution electron channeling X-ray spectroscopy (HARECXS) sheds light on the understanding of order-disorder transitions and kinematically controlled chemical reactions on the reaction front of the mineral formation process. In addition to spectroscopy, imaging can also be carried...

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