Fig. 2: Xe three-isotope diagrams with data points for combustion steps of C0209 (Source data are provided in Supplementary Table S4).
From: A primordial noble gas component discovered in the Ryugu asteroid and its implications
Xe isotopic compositions of the solar wind (SW11), atmosphere (Atm.), planetary (P14), and direction to presolar nanodiamonds Xe-HL28 and to 244Pu fission Xe38 (only for the 129Xe/132Xe vs. 136Xe/132Xe plot) are also shown for reference. MFL- mass fractionation line. Most of the experimental points are on the mixing line going through P1, though mixing with SW Xe cannot be excluded. The numbers next to the points on the 129Xe/132Xe vs. 136Xe/132Xe diagram are the temperature steps in oC. Error bars correspond to 1σ. Dashed lines through atmospheric composition indicate the direction of mass-dependent fractionation. Apart from known primordial noble gas components, an additional unknown component (Xe-X) is required to explain the experimental data. Clearly, Xe-X cannot be produced by fractionation of atmospheric Xe.
