Fig. 5 TEM observation of moganite.

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Fig. 5 TEM observation of moganite. TEM observation of moganite. (A and B) Bright-field TEM images of nanocrystalline aggregates (A) and the largest grain (107.6 nm in radius) (B) of moganite (Mog) taken from the SiO2 region of the silica micrograin (no. 1) (red in fig. S8A). (C and D) SAED patterns of moganite along the [001] (C) and [01] (D) zone axes. The diffraction patterns were acquired from the same largest grain within the SiO2 region, with an angular relationship of 25.2° between them. Both the aggregates of numerous fine nanoparticles (average radius of 4.5 nm) and the largest grain show spot diffraction patterns corresponding to a moganite structure rather than Debye-Scherrer rings, which indicates the occurrence of moganite nanoparticles with the same crystal orientation. Masahiro Kayama et al. Sci Adv 2018;4:eaar4378 Copyright © 2018 The Authors, some rights reserved; exclusive licensee American Association for the Advancement of Science. No claim to original U.S. Government Works. Distributed under a Creative Commons Attribution NonCommercial License 4.0 (CC BY-NC).