Fig. 5. ToF-SIMS analysis of fresh fracture surface of the Tissint meteorite.

The first image is a light microscope image of a fresh fracture surface of the Tissint meteorite, as analyzed within the ToF-SIMS instrument. Individual species are recorded in the top right of the individual images and include Cl⁻, S⁻, SO₃⁻, CN⁻, CNO⁻, COOH⁻, C₂S⁻, FeO₂⁻, FeCl⁻, ClO⁻, and ClO₄⁻. The red box in the first ion image of the first row (Cl⁻) denotes an area of concentration of many carbon-, nitrogen-, chlorine-, iron-, and sulfur-containing species that are labeled in the top right of the remaining images. Scale bars, 20 μm. See table S2 for absolute peak assignments and fig. S5 for further species maps.