Data for: A Novel Spectral Model for Goethite/Hematite Quantification on Earth and Mars (Standards, Soils, ChemCam Metrics, CheMin Validation)

This dataset accompanies the manuscript “A Novel Spectral Model for Quantifying Goethite/Hematite Ratios in Soil and Sediments on Earth and Mars” and provides the tabulated data used to derive, apply, and validate the proposed EPT-based quantitative framework. The dataset contains (i) Earth-based reference/validation data (synthetic standards and modern soils) and (ii) Mars rover application data derived from Curiosity ChemCam passive spectra with independent CheMin XRD constraints. The dataset is organized into four tables: Synthetic standards: controlled hematite–goethite mixtures/standards with endmember fractions (Hm%, Gt%) and corresponding visible-band spectral metrics (λ1/2 and λc, in nm). Hainan modern soils: modern soil samples with Gt/Hm ratios and associated spectral metrics (λ1/2, λc, in nm). ChemCam passive spectral metrics and hematite estimates: Curiosity ChemCam passive observations summarized by Sol, PSVFilename (PDS product identifier), TargetType, Target, derived λ1/2 (nm), and retrieved hematite proportion (Hematite%). ChemCam passive spectral metrics and CheMin-derived Gt/Hm ratios (validation set): ChemCam passive observations for targets with available CheMin XRD constraints, listing Sol, PSVFilename, TargetType, Target, derived λ1/2 (nm), and Gt/Hm from CheMin.