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This dataset contains pressure-entropy (P-S) lookup tables for solid and melt phases of MgSiO3, covering pressures up to 1 TPa, together with P-S melting curves. These tables are the canonical runtime input for the SPIDER magma ocean interior solver and the Aragog Python successor used by the PROTEUS coupled atmosphere-interior framework.

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## Contents

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10 phase-property files (melt and solid phases, 5 quantities each) in SPIDER's canonical 5-line header + 3-column format:

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- temperature_{melt,solid}.dat  — T(P, S) in K
- density_{melt,solid}.dat  — rho(P, S) in kg/m^3
- heat_capacity_{melt,solid}.dat  — Cp(P, S) in J/kg/K
- adiabat_temp_grad_{melt,solid}.dat  — dT/dP at constant S in K/Pa
- thermal_exp_{melt,solid}.dat  — alpha(P, S) in 1/K

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2 melting-curve files in 2-column (pressure, entropy) format:

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- solidus_P-S.dat  — Andrault et al. 2011 solidus mapped to P-S coordinates
- liquidus_P-S.dat  — Hirschmann 2013 liquidus mapped to P-S coordinates

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A README.md file documenting the column scaling factors and unit conventions, and an md5sums.txt for integrity verification.

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## File format

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All phase-property files use the SPIDER canonical header:

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    # 5 <n_S> <n_P>
    # Pressure, Entropy, Quantity
    # column * scaling factor should be SI units
    # scaling factors (constant) for each column given on line below
    # <P_scale> <S_scale> <Q_scale>

\n

Multiply each column by its scaling factor to obtain SI units. Standard pressure scale is 1e9 (columns in GPa), standard entropy scale is 4805046.659407042 J/kg/K.

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