Extended Data Fig. 2: Surface features of sodium carbonates and extracted FIB section of C0369-113001.
From: Sodium carbonates on Ryugu as evidence of highly saline water in the outer Solar System
(a, b) BSE image and distribution of sodium on the grain surface. The sodium carbonate veins appear as bright regions near the edge of the grain in (b). (c) SE image of sodium carbonates having granular morphology. (d) Framboidal magnetite grains embedded in the grain surface adjacent to the sodium carbonate veins. The porous surface feature of the magnetite suggests space weathering17. (e) Bright-field (BF) TEM image of a FIB section extracted from the dashed line in (c). Arrows indicate sodium carbonates. (f) Selected area electron diffraction (SAED) pattern from a circular area in (e). Phy: phyllosilicates; Pt-c: platinum protective coat.
