Fig. 1: Sodium carbonate vein on Ryugu grain C0071.
From: Sodium carbonates on Ryugu as evidence of highly saline water in the outer Solar System
a, Optical microscope image of the Ryugu grain. The sodium carbonate vein is indicated by an arrow. b, Composite elemental map of sodium (green), silicon (blue) and iron (magenta), obtained by SEM. c, Composite elemental map of magnesium (cyan), phosphorus (yellow) and calcium (magenta). Ap, apatite (indicated by dashed white arrows); Do, dolomite; Mgt, magnetite; Na-car, sodium carbonates; Na-Mg-ph, Na-Mg phosphates (indicated by solid yellow arrows); Phy, phyllosilicate matrix.
