{
  "counts": {
    "above_hull": 0,
    "entries": 7,
    "intervals": 6,
    "vertices": 7
  },
  "elements": [
    "O",
    "U"
  ],
  "flags": [
    "gas_on_hull",
    "has_intermediate_phases",
    "solution_phases"
  ],
  "isotherms": [
    {
      "element_reference": {
        "O": {
          "energy": -30548.990898574637,
          "phase": "O2GAS"
        },
        "U": {
          "energy": -14967.135664623467,
          "phase": "ORTHORHOMBIC_A20"
        }
      },
      "intervals": [
        {
          "enthalpy": {
            "intercept": 0.0,
            "slope": -1223799.9514269303
          },
          "entropy": {
            "intercept": 0.0,
            "slope": -261.47532402997365
          },
          "intercept": 0.0,
          "kind": "two_phase",
          "left": {
            "phase": "O2GAS",
            "x": 0.0
          },
          "mu_a_rel": 0.0,
          "mu_b_rel": -1145841.0835673937,
          "right": {
            "phase": "UO3",
            "x": 0.25
          },
          "slope": -1145841.0835673937,
          "x_hi": 0.25,
          "x_lo": 0.0
        },
        {
          "enthalpy": {
            "intercept": -93984.53377737437,
            "slope": -847861.8163174328
          },
          "entropy": {
            "intercept": -98.23543122279531,
            "slope": 131.4664008612076
          },
          "intercept": -64695.63995829786,
          "kind": "two_phase",
          "left": {
            "phase": "UO3",
            "x": 0.25
          },
          "mu_a_rel": -64695.63995829786,
          "mu_b_rel": -951754.1636925001,
          "right": {
            "phase": "U3O8_S1",
            "x": 0.2727272727272727
          },
          "slope": -887058.5237342023,
          "x_hi": 0.2727272727272727,
          "x_lo": 0.25
        },
        {
          "enthalpy": {
            "intercept": -153475.61109983263,
            "slope": -629727.8661350858
          },
          "entropy": {
            "intercept": -76.58181097651261,
            "slope": 52.06979329150435
          },
          "intercept": -130642.74415718517,
          "kind": "two_phase",
          "left": {
            "phase": "U3O8_S1",
            "x": 0.2727272727272727
          },
          "mu_a_rel": -130642.74415718517,
          "mu_b_rel": -775895.219162134,
          "right": {
            "phase": "U4O9_S1",
            "x": 0.3076923076923077
          },
          "slope": -645252.4750049488,
          "x_hi": 0.3076923076923077,
          "x_lo": 0.2727272727272727
        },
        {
          "enthalpy": {
            "intercept": -175686.2002184111,
            "slope": -557543.4514997058
          },
          "entropy": {
            "intercept": -76.57480550762162,
            "slope": 52.04702551760866
          },
          "intercept": -152855.4219563158,
          "kind": "two_phase",
          "left": {
            "phase": "U4O9_S1",
            "x": 0.3076923076923077
          },
          "mu_a_rel": -152855.4219563158,
          "mu_b_rel": -725916.69411409,
          "right": {
            "phase": "UO2_C1",
            "x": 0.33331899879897287
          },
          "slope": -573061.2721577742,
          "x_hi": 0.33331899879897287,
          "x_lo": 0.3076923076923077
        },
        {
          "enthalpy": {
            "entropy_form": null,
            "hermite": [
              [
                -361526.0252592167,
                -10.525943557411917,
                -0.0013953376033413178,
                9.800860013342572e-06
              ]
            ],
            "knots": [
              0.33331899879897287,
              0.3333333333334256
            ],
            "max_abs_error": 1.4561228454113007e-06
          },
          "entropy": {
            "entropy_form": {
              "R": 8.31446261815324,
              "kind": "ideal_mixing_entropy"
            },
            "hermite": [
              [
                -64.51873371397683,
                -0.007834926660962452,
                0.0030591601095534948,
                -0.004131826990710642
              ]
            ],
            "knots": [
              0.33331899879897287,
              0.3333333333334256
            ],
            "max_abs_error": 0.0004621375926348037
          },
          "entropy_form": {
            "RT": 2478.957029602388,
            "kind": "ideal_mixing"
          },
          "hermite": [
            [
              -342289.76480239443,
              -8.1899601803262,
              -0.9134839090804903,
              1.2319140097645445
            ]
          ],
          "kind": "single_phase",
          "knots": [
            0.33331899879897287,
            0.3333333333334256
          ],
          "max_abs_error": 0.1377877687336877,
          "phase": "UO2_C1",
          "x_hi": 0.3333333333334256,
          "x_lo": 0.33331899879897287
        },
        {
          "enthalpy": {
            "intercept": -542304.8288825414,
            "slope": 542304.8288825414
          },
          "entropy": {
            "intercept": -88.85305207397175,
            "slope": 88.85305207397175
          },
          "intercept": -515813.29140668665,
          "kind": "two_phase",
          "left": {
            "phase": "UO2_C1",
            "x": 0.3333333333334256
          },
          "mu_a_rel": -515813.29140668665,
          "mu_b_rel": 5.820766091346741e-11,
          "right": {
            "phase": "ORTHORHOMBIC_A20",
            "x": 1.0
          },
          "slope": 515813.2914066867,
          "x_hi": 1.0,
          "x_lo": 0.3333333333334256
        }
      ],
      "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": "O2GAS",
          "phase_kind": "solution",
          "spacegroup_number": null,
          "spacegroup_symbol": "",
          "theoretical": false,
          "x": 0.0
        },
        {
          "collinear": false,
          "degenerate": [],
          "energy": -286460.2708918484,
          "energy_per_atom": -286460.2708918484,
          "enthalpy": -305949.98785673256,
          "entries_at_x": 1,
          "entropy": -65.36883100749341,
          "formula": "",
          "nsites": null,
          "phase": "UO3",
          "phase_kind": "solution",
          "spacegroup_number": null,
          "spacegroup_symbol": "",
          "theoretical": false,
          "x": 0.25
        },
        {
          "collinear": false,
          "degenerate": [],
          "energy": -306620.69188580755,
          "energy_per_atom": -306620.69188580755,
          "enthalpy": -325219.57459121966,
          "entries_at_x": 1,
          "entropy": -62.38095826064779,
          "formula": "",
          "nsites": null,
          "phase": "U3O8_S1",
          "phase_kind": "solution",
          "spacegroup_number": null,
          "spacegroup_symbol": "",
          "theoretical": false,
          "x": 0.2727272727272727
        },
        {
          "collinear": false,
          "degenerate": [],
          "energy": -329181.96723563096,
          "energy_per_atom": -329181.96723563096,
          "enthalpy": -347238.0314490898,
          "entries_at_x": 1,
          "entropy": -60.56033611758819,
          "formula": "",
          "nsites": null,
          "phase": "U4O9_S1",
          "phase_kind": "solution",
          "spacegroup_number": null,
          "spacegroup_symbol": "",
          "theoretical": false,
          "x": 0.3076923076923077
        },
        {
          "collinear": false,
          "degenerate": [],
          "energy": -343867.6314424108,
          "energy_per_atom": -343867.6314424108,
          "enthalpy": -361526.0252592167,
          "entries_at_x": 1,
          "entropy": -59.22654307162772,
          "formula": "",
          "nsites": null,
          "phase": "UO2_C1",
          "phase_kind": "solution",
          "spacegroup_number": null,
          "spacegroup_symbol": "",
          "theoretical": false,
          "x": 0.33331899879897287
        },
        {
          "collinear": false,
          "degenerate": [],
          "energy": -343875.5276044102,
          "energy_per_atom": -343875.5276044102,
          "enthalpy": -361536.5525883109,
          "entries_at_x": 1,
          "entropy": -59.2353680493063,
          "formula": "",
          "nsites": null,
          "phase": "UO2_C1",
          "phase_kind": "solution",
          "spacegroup_number": null,
          "spacegroup_symbol": "",
          "theoretical": false,
          "x": 0.3333333333334256
        },
        {
          "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": "UO-11Gue",
    "builder_version": 1,
    "engine": {
      "numpy": "2.5.1",
      "pycalphad": "0.11.2",
      "python": "3.13.15"
    },
    "fit_tol": 1.0,
    "observed_at": "2026-09-03T01:29:11Z",
    "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/UO-11Gue.tdb",
    "source_sha256": "880201adec5fc9b23e6b96b082d9df79ff4066891805b77d528964846792e8ea"
  },
  "reference": {
    "kind": "calphad_formation_T",
    "per": "mole_atoms",
    "temperature_K": 298.15,
    "units": "J/mol-atoms"
  },
  "schema_version": 1,
  "system_id": "O-U",
  "x_element": "U"
}