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Figure 3
Thickness was estimated at the location of the data collection via the log-ratio method. The figures show the local thickness overlaid on an image of the lamella for lamellae milled with argon, xenon and gallium with approximate thicknesses of 100, 150 and 200 nm. The thickness of these lamellae ranges between ∼50 and ∼250 nm and is indicated by the colour bar which shows the thickness gradient over the lamellae. The area of the lamella under the selected area aperture is indicated by the black circle.

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