{
  "counts": {
    "above_hull": 0,
    "entries": 4,
    "intervals": 3,
    "vertices": 4
  },
  "elements": [
    "AG",
    "PB"
  ],
  "flags": [
    "miscibility_gap",
    "no_intermediate_phases",
    "solution_phases"
  ],
  "isotherms": [
    {
      "element_reference": {
        "AG": {
          "energy": -12686.282458897687,
          "phase": "FCC_A1"
        },
        "PB": {
          "energy": -19320.12041049306,
          "phase": "FCC_A1"
        }
      },
      "intervals": [
        {
          "enthalpy": {
            "entropy_form": null,
            "hermite": [
              [
                0.0,
                2.282834902236288,
                0.004079631271165507,
                -0.0021815637795832288
              ]
            ],
            "knots": [
              0.0,
              9.840713646060502e-05
            ],
            "max_abs_error": 0.00031296079137066446
          },
          "entropy": {
            "entropy_form": {
              "R": 8.31446261815324,
              "kind": "ideal_mixing_entropy"
            },
            "hermite": [
              [
                0.0,
                9.412688679632025e-05,
                3.821345941611707e-05,
                -1.915380291634048e-05
              ]
            ],
            "knots": [
              0.0,
              9.840713646060502e-05
            ],
            "max_abs_error": 2.7482004651124204e-06
          },
          "entropy_form": {
            "RT": 2478.957029602388,
            "kind": "ideal_mixing"
          },
          "hermite": [
            [
              0.0,
              2.254770970789035,
              -0.007313711349977492,
              0.003529142404070207
            ]
          ],
          "kind": "single_phase",
          "knots": [
            0.0,
            9.840713646060502e-05
          ],
          "max_abs_error": 0.000506415157700002,
          "phase": "FCC_A1#1",
          "x_hi": 9.840713646060502e-05,
          "x_lo": 0.0
        },
        {
          "enthalpy": {
            "intercept": 2.2848296164529587,
            "slope": -0.9821109379278516
          },
          "entropy": {
            "intercept": 0.008480742096019879,
            "slope": -0.003378481732884748
          },
          "intercept": -0.24370363947637866,
          "kind": "two_phase",
          "left": {
            "phase": "FCC_A1#1",
            "x": 9.840713646060502e-05
          },
          "mu_a_rel": -0.24370363947637866,
          "mu_b_rel": -0.21852024874569564,
          "right": {
            "phase": "FCC_A1#2",
            "x": 0.9999117709710448
          },
          "slope": 0.025183390730683,
          "x_hi": 0.9999117709710448,
          "x_lo": 9.840713646060502e-05
        },
        {
          "enthalpy": {
            "entropy_form": null,
            "hermite": [
              [
                1.3028053292194866,
                -1.3027709400811285,
                -0.0014214441269615463,
                0.0013870549886034755
              ]
            ],
            "knots": [
              0.9999117709710448,
              1.0
            ],
            "max_abs_error": 0.00019897990122835774
          },
          "entropy": {
            "entropy_form": {
              "R": 8.31446261815324,
              "kind": "ideal_mixing_entropy"
            },
            "hermite": [
              [
                -0.002479348564396352,
                0.0024787750873497753,
                -1.1649394349376365e-05,
                1.2222871395952892e-05
              ]
            ],
            "knots": [
              0.9999117709710448,
              1.0
            ],
            "max_abs_error": 1.7538430391898438e-06
          },
          "entropy_form": {
            "RT": 2478.957029602388,
            "kind": "ideal_mixing"
          },
          "hermite": [
            [
              2.0420231036921956,
              -2.041817731507345,
              0.0020518214821025893,
              -0.0022571936669533166
            ]
          ],
          "kind": "single_phase",
          "knots": [
            0.9999117709710448,
            1.0
          ],
          "max_abs_error": 0.0003239285282083948,
          "phase": "FCC_A1#2",
          "x_hi": 1.0,
          "x_lo": 0.9999117709710448
        }
      ],
      "phase_instances": {
        "FCC_A1#1": "FCC_A1",
        "FCC_A1#2": "FCC_A1"
      },
      "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": "FCC_A1#1",
          "phase_kind": "solution",
          "spacegroup_number": null,
          "spacegroup_symbol": "",
          "theoretical": false,
          "x": 0.0
        },
        {
          "collinear": false,
          "degenerate": [],
          "energy": -0.2437011612510105,
          "energy_per_atom": -0.2437011612510105,
          "enthalpy": 2.2847329697278704,
          "entries_at_x": 1,
          "entropy": 0.008480409629306962,
          "formula": "",
          "nsites": null,
          "phase": "FCC_A1#1",
          "phase_kind": "solution",
          "spacegroup_number": null,
          "spacegroup_symbol": "",
          "theoretical": false,
          "x": 9.840713646060502e-05
        },
        {
          "collinear": false,
          "degenerate": [],
          "energy": -0.21852247065180563,
          "energy_per_atom": -0.21852247065180563,
          "enthalpy": 1.3028053292194866,
          "entries_at_x": 1,
          "entropy": 0.005102558443297767,
          "formula": "",
          "nsites": null,
          "phase": "FCC_A1#2",
          "phase_kind": "solution",
          "spacegroup_number": null,
          "spacegroup_symbol": "",
          "theoretical": false,
          "x": 0.9999117709710448
        },
        {
          "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": "FCC_A1#2",
          "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": "AgPb-86Hay",
    "builder_version": 1,
    "engine": {
      "numpy": "2.5.1",
      "pycalphad": "0.11.2",
      "python": "3.13.15"
    },
    "fit_tol": 1.0,
    "observed_at": "2026-09-03T00:00:36Z",
    "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/AgPb-86Hay.tdb",
    "source_sha256": "b1e63eaf751e100904e4c53c21a2f0862cba28806b674fb840f18e74cd411d52"
  },
  "reference": {
    "kind": "calphad_formation_T",
    "per": "mole_atoms",
    "temperature_K": 298.15,
    "units": "J/mol-atoms"
  },
  "schema_version": 1,
  "system_id": "AG-PB",
  "x_element": "PB"
}
