Supplementary Tables R1 of "Determination of Fe3+ and Fe2+ partition coefficients between pyroxenes and basaltic melt by in-situ synchrotron Mössbauer spectroscopy"

Pyroxenes (opx and cpx) are the major hosts of Fe3+ and the mineral/melt partition coefficients of Fe3+ and Fe2+ (DFe2+ and DFe3+) are crucial for understanding redox variations during magmatic processes. However, the mineral/melt DFe2+ and DFe3+ for pyroxenes are sparse due to the difficulty in quantifying Fe3+ content of pyroxenes. In this study, we synthesized big pyroxenes and melt and maintained the Fe3+ and Fe2+ contents of the sample by optimizing the high pressure experiment. The DFe2+ and DFe3+ for pyroxenes were obtained by measuring Fe3+ and Fe2+ contents of the opx, cpx and melt with the advanced in-situ synchrotron Mössbauer spectroscopy using a beam size as small as辉石（pyroxenes，涵盖斜方辉石opx与单斜辉石cpx）是三价铁（Fe³⁺）的主要赋存矿物，Fe³⁺与二价铁（Fe²⁺）的矿物-熔体分配系数（DFe²⁺与DFe³⁺）对于解析岩浆作用过程中的氧化还原状态变化具有关键意义。然而，由于难以定量测定辉石中的Fe³⁺含量，当前关于辉石的DFe²⁺与DFe³⁺数据仍较为匮乏。本研究通过优化高压实验方案，合成了大尺寸辉石与熔体样品，并精准调控并维持了样品中Fe³⁺与Fe²⁺的含量。研究人员借助先进的原位同步穆斯堡尔谱学（synchrotron Mössbauer spectroscopy），以极小束斑尺寸对opx、cpx及熔体中的Fe³⁺与Fe²⁺含量进行测定，由此获得了辉石的DFe²⁺与DFe³⁺数值。