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Figure 1
Wedge-milling protocol. (a) In the first step, a coarse flat lamella is progressively milled to 2 µm with a high current and then to 1 µm with a medium current. (b) Subsequently, a fine flat lamella is milled to 300 nm with a low current. Finally, the length of the lamella is measured and the angle with which to tilt the stage such that the wedge will taper to zero is calculated. (c) The wedge lamella is then milled with a low `polishing' current.

IUCrJ
Volume 10| Part 3| May 2023| Pages 270-287
ISSN: 2052-2525
https://doi.org/10.1107/S2052252523001902