Fig. 2: A space-weathered glass grain from lunar soil 79221 containing vesicular nanophase metallic iron particles (v-npFe0). | Communications Earth & Environment

Fig. 2: A space-weathered glass grain from lunar soil 79221 containing vesicular nanophase metallic iron particles (v-npFe0).

From: Helium reservoirs in iron nanoparticles on the lunar surface

Fig. 2

a A cross-section of the glass grain showing v-npFe0 near the surface and npFe0 in interior. b Large and small v-npFe0 within the area indicated in (a). c A higher magnification image of the dashed region of (b) showing the lattice fringes of the large v-npFe0; inset: the Fast Fourier Transform of (c) showing a 2.0 Å d-spacing corresponding to (110) of α-Fe. d A melt splash region indicated in (a) with large and small v-npFe0. e The EELS spectra in the range 680–750 eV of the dashed region of (d) showing the Fe L3,2-edge of v-npFe0 (solid line) compared to that of a metallic iron standard (dashed line).

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