Fig. 4

Multilayer rim in olivine grain. a HRTEM image exhibiting microstructural layers 1 and 2. b HRTEM image showing the occurrence of lattice fringes in layer 2 with d-spacing values of 2.72 Å corresponding to (130) olivine, and in layer 1 values of 2.04 Å and 1.45 Å similar to (110) and (200) metallic iron, respectively. Dashed area within the nanocrystalline region point out the presence of amorphous domains. c HAADF image overlain with EDS maps of Fe and Mg. d HAADF image with Si and O EDS maps. e HAADF image with EDS maps of Fe, Mg, Si, O showing the location of the line scan. f Quantitative EDS line scan indicating the presence of three chemically distinct sections