Data and analysis code for: Acoustically optimal state points for constraining CCS mixture models in the metering-critical region of CO₂ + N₂, O₂, and Ar

Complete computational pipeline and outputs for the above manuscript (submitted to International Journal of Thermophysics): candidate-grid Jacobians and input-derivative grids, D-optimal measurement designs, projected covariances, replicate fit results, extracted literature comparison values, and the verified CO₂–Ar model implementation. Environment specification with exact package versions and random seeds included; every number and figure in the manuscript regenerates from the archived scripts.