Fig. 3: TEM and STEM analyses of halite in Ryugu grain C0071.
From: Sodium carbonates on Ryugu as evidence of highly saline water in the outer Solar System
a, ADF-STEM image of sodium carbonates in Ryugu grain (FIB section C0071-01). The z-contrast is inverted for better visualization. The yellow dashed line indicates a boundary between sodium carbonates and the phyllosilicate matrix. Upper and lower dark areas correspond to a platinum coating (Pt-c). b, Enlarged view of the box region in a. The ADF-STEM image is overlaid with the chlorine distribution (red) obtained by the STEM-EDX analysis. The slight difference in contrast between the right and left sides is due to variations in sample thickness. Relatively large voids are labelled v. c, Bright-field TEM image obtained from the box in b. The circle is the area corresponding to the diffraction pattern in d. d, SAED pattern of a halite particle. BF-TEM, bright-field TEM.
