Extended Data Fig. 1: The maturity of the Chang’e-6 soil samples.

a, The Mössbauer spectrum of ~180 mg Chang’e-6 lunar soil. b, the estimated Is/FeO values based on the linear relationship between Fe⁰/FeO and Is/FeO of lunar mare soils⁵⁰. The Chang’e-5 and Apollo data compiled in Qian et al.⁵⁰ are shown for comparison.

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