Fig. 1. Backscattered electron (BSE) image of the seifertite- and stishovite-bearing silica fragment in CE-5 regolith sample 01GP. The phase in the smooth area around the seifertite, stishovite, and α-cristobalite-like phases is amorphous silica. Sft, seifertite; Sti, stishovite; α-Crs-like, α-cristobalite-like. Reproduced with permission from Pang et al., “New occurrence of seifertite and stishovite in Chang’E-5 regolith,” Geophys. Res. Lett. 49(12), e2022GL098722 (2022). Copyright 2022 John Wiley & Sons.

Fig. 2. BSE images showing the tweed-like texture of the silica fragment in Fig. 1. The white dashed lines represent the orientations of the amorphous silica lamellae. Sft, seifertite; Sti, stishovite; α-Crs-like, α-cristobalite-like. Reproduced with permission from Pang et al., “New occurrence of seifertite and stishovite in Chang’E-5 regolith,” Geophys. Res. Lett. 49(12), e2022GL098722 (2022). Copyright 2022 John Wiley & Sons.

Fig. 3. Y+REE vs other cations in changesite-(Y), expressed as cations per 56 O atoms. Data are listed in Table I. (a) Y+REE vs Ca; the regression equation is for the line shown, fitted to the changesite-(Y) grains in CE-5 sample 01GP. (b) Y+REE vs Na, Si, and Mg,Fe-site atoms in changesite-(Y). Mg,Fe-site atoms include Mg, Fe, and Mn.

Fig. 4. BSE images of changesite-(Y) in basalt fragments from CE-5 regolith sample 01GP. Fa, fayalite; Px, pyroxene; Pl, plagioclase; Crs, cristobalite; Bdy, baddeleyite; Tro, troilite.