TEM images showing the different morphologies of the produced np-Fe⁰ particles. Image (a) shows the Fa₂₉-P25mJ experiment produced generally spherical shapes of np-Fe⁰ particles distributed in the subsolidus layer and at the bottom of the amorphous layer. Image (b) shows the Fa₅₀-P75mJ experiment produced angular and spherical-shaped npFe⁰ particles dispersed in the subsolidus layer and at the bottom of the amorphous layer. Image (c) shows the Fa₇₁-M75mJ experiment had the most angular and subangular-shaped npFe⁰ particles, with fewer spherical particles. Image (d) shows the Fa₁₀₀-P5mJ experiment commonly produced angular-shaped np-Fe⁰ particles. With increasing Fa# values of the initial olivine, the produced np-Fe⁰ particles demonstrated a tendency from spherical to angular, and abundant angular np-Fe⁰ particles were observed in the experiments with Fa# ≥ 50.