Fig. 2: Framboids in particle A0064–FO007–I of asteroid Ryugu.

A, B. Bright-field transmission electron microscopy (TEM) and the corresponding magnetic-flux-distribution images, respectively, of framboidal magnetite particles in a thin section prepared from Position i (FIBi) in Fig. 1A. C Bright-field TEM image of a thin section extracted from the Position ii (FIBii) in Fig. 1A. D Magnetic-flux-distribution image of box 2d in (C). All magnetic-flux-distribution images are two times the phase-amplified reconstruction. Scale bars are 500 nm for (A, B), 2 μm for (C) and 1 μm for (D).