{
  "counts": {
    "above_hull": 0,
    "entries": 4,
    "intervals": 3,
    "vertices": 4
  },
  "elements": [
    "NP",
    "U"
  ],
  "flags": [
    "no_intermediate_phases",
    "solution_phases"
  ],
  "isotherms": [
    {
      "element_reference": {
        "NP": {
          "energy": -15044.352836664593,
          "phase": "ORTHO_AC"
        },
        "U": {
          "energy": -14967.13040319797,
          "phase": "ORTHORHOMBIC_A20"
        }
      },
      "intervals": [
        {
          "enthalpy": {
            "entropy_form": null,
            "hermite": [
              [
                0.0,
                234.3551905107677,
                -4.7951080318680965,
                -0.000579137405424035
              ]
            ],
            "knots": [
              0.0,
              0.0362353531883941
            ],
            "max_abs_error": 7.969599556645335e-05
          },
          "entropy": {
            "entropy_form": {
              "R": 8.31446261815324,
              "kind": "ideal_mixing_entropy"
            },
            "hermite": [
              [
                0.0,
                -4.538370658571907e-06,
                2.1615529192065652e-05,
                -1.1433891866194772e-05
              ]
            ],
            "knots": [
              0.0,
              0.0362353531883941
            ],
            "max_abs_error": 1.7906241455599261e-06
          },
          "entropy_form": {
            "RT": 2478.957029602388,
            "kind": "ideal_mixing"
          },
          "hermite": [
            [
              0.0,
              234.35654362611845,
              -4.801552702088941,
              0.0028298775079349525
            ]
          ],
          "kind": "single_phase",
          "knots": [
            0.0,
            0.0362353531883941
          ],
          "max_abs_error": 0.0004546324128824608,
          "phase": "ORTHO_AC",
          "x_hi": 0.0362353531883941,
          "x_lo": 0.0
        },
        {
          "enthalpy": {
            "intercept": 170.1542513385633,
            "slope": 1639.427983330873
          },
          "entropy": {
            "intercept": 0.8614861266899183,
            "slope": 11.972444879052174
          },
          "intercept": -86.69783733403581,
          "kind": "two_phase",
          "left": {
            "phase": "ORTHO_AC",
            "x": 0.0362353531883941
          },
          "mu_a_rel": -86.69783733403581,
          "mu_b_rel": -2016.8542946925654,
          "right": {
            "phase": "ORTHORHOMBIC_A20",
            "x": 0.5667880997494827
          },
          "slope": -1930.1564573585297,
          "x_hi": 0.5667880997494827,
          "x_lo": 0.0362353531883941
        },
        {
          "enthalpy": {
            "entropy_form": null,
            "hermite": [
              [
                1099.3625226867955,
                -2095.9224380067585,
                996.5597975871653,
                0.00011773279737781195
              ]
            ],
            "knots": [
              0.5667880997494827,
              1.0
            ],
            "max_abs_error": 1.957940088459509e-05
          },
          "entropy": {
            "entropy_form": {
              "R": 8.31446261815324,
              "kind": "ideal_mixing_entropy"
            },
            "hermite": [
              [
                1.958577078324243,
                -3.2571935804892354,
                1.2986606683633517,
                -4.416619835956315e-05
              ]
            ],
            "knots": [
              0.5667880997494827,
              1.0
            ],
            "max_abs_error": 4.571637775563353e-06
          },
          "entropy_form": {
            "RT": 2478.957029602388,
            "kind": "ideal_mixing"
          },
          "hermite": [
            [
              515.4127667844239,
              -1124.7901719838953,
              609.3641193145277,
              0.013285884943826431
            ]
          ],
          "kind": "single_phase",
          "knots": [
            0.5667880997494827,
            1.0
          ],
          "max_abs_error": 0.001357115892865579,
          "phase": "ORTHORHOMBIC_A20",
          "x_hi": 1.0,
          "x_lo": 0.5667880997494827
        }
      ],
      "temperature_K": 298.15,
      "vertices": [
        {
          "collinear": false,
          "degenerate": [],
          "energy": 0.0,
          "energy_per_atom": 0.0,
          "enthalpy": 0.0,
          "entries_at_x": 1,
          "entropy": 0.0,
          "formula": "",
          "nsites": null,
          "phase": "ORTHO_AC",
          "phase_kind": "solution",
          "spacegroup_number": null,
          "spacegroup_symbol": "",
          "theoretical": false,
          "x": 0.0
        },
        {
          "collinear": false,
          "degenerate": [],
          "energy": -156.63773827528166,
          "energy_per_atom": -156.63773827528166,
          "enthalpy": 229.55950334149418,
          "entries_at_x": 1,
          "entropy": 1.2953118954109542,
          "formula": "",
          "nsites": null,
          "phase": "ORTHO_AC",
          "phase_kind": "solution",
          "spacegroup_number": null,
          "spacegroup_symbol": "",
          "theoretical": false,
          "x": 0.0362353531883941
        },
        {
          "collinear": false,
          "degenerate": [],
          "energy": -1180.6875480194703,
          "energy_per_atom": -1180.6875480194703,
          "enthalpy": 1099.3625226867955,
          "entries_at_x": 1,
          "entropy": 7.647325409043326,
          "formula": "",
          "nsites": null,
          "phase": "ORTHORHOMBIC_A20",
          "phase_kind": "solution",
          "spacegroup_number": null,
          "spacegroup_symbol": "",
          "theoretical": false,
          "x": 0.5667880997494827
        },
        {
          "collinear": false,
          "degenerate": [],
          "energy": 0.0,
          "energy_per_atom": 0.0,
          "enthalpy": 0.0,
          "entries_at_x": 1,
          "entropy": 0.0,
          "formula": "",
          "nsites": null,
          "phase": "ORTHORHOMBIC_A20",
          "phase_kind": "solution",
          "spacegroup_number": null,
          "spacegroup_symbol": "",
          "theoretical": false,
          "x": 1.0
        }
      ]
    }
  ],
  "mp_agreement": {
    "comparable": false,
    "comparable_note": "CALPHAD isotherms have no upstream stability flag to compare against",
    "max_abs_delta_energy_above_hull": 0.0,
    "only_mp_stable": [],
    "only_ours_stable": [],
    "stable_sets_match": true
  },
  "provenance": {
    "assessment": "NpU-10Kur",
    "builder_version": 1,
    "engine": {
      "numpy": "2.5.1",
      "pycalphad": "0.11.2",
      "python": "3.13.15"
    },
    "fit_tol": 1.0,
    "observed_at": "2026-09-03T00:56:05Z",
    "phase_families": {},
    "sample_conditions": {
      "endpoint_tol": 1.0,
      "fit_samples": 65,
      "order_tol": 0.0001,
      "pressure_Pa": 101325.0,
      "redundant_tol": 1.0,
      "refine_tol": 1e-07,
      "step": 0.002,
      "temperature_K": 298.15
    },
    "source_path": "databases/sgte-binary/NpU-10Kur.tdb",
    "source_sha256": "f85b49b94decbbeefe9a824e17f4121a19093cc3753a579c8652a5c165bffad6"
  },
  "reference": {
    "kind": "calphad_formation_T",
    "per": "mole_atoms",
    "temperature_K": 298.15,
    "units": "J/mol-atoms"
  },
  "schema_version": 1,
  "system_id": "NP-U",
  "x_element": "U"
}
