{
  "counts": {
    "above_hull": 0,
    "entries": 3,
    "intervals": 2,
    "vertices": 3
  },
  "elements": [
    "AG",
    "PB"
  ],
  "flags": [
    "miscibility_gap",
    "no_intermediate_phases",
    "solution_phases"
  ],
  "isotherms": [
    {
      "element_reference": {
        "AG": {
          "energy": -12686.282457176334,
          "phase": "FCC_A1"
        },
        "PB": {
          "energy": -19320.12039536755,
          "phase": "FCC_A1"
        }
      },
      "intervals": [
        {
          "enthalpy": {
            "entropy_form": null,
            "hermite": [
              [
                0.0,
                1.3311376698932256,
                0.005264599796234615,
                -0.0025566875209177553
              ]
            ],
            "knots": [
              0.0,
              4.8965629009369143e-05
            ],
            "max_abs_error": 0.0003667580523152858
          },
          "entropy": {
            "entropy_form": {
              "R": 8.31446261815324,
              "kind": "ideal_mixing_entropy"
            },
            "hermite": [
              [
                0.0,
                0.00041345810841209344,
                3.997011311367989e-05,
                -1.986607028383751e-05
              ]
            ],
            "knots": [
              0.0,
              4.8965629009369143e-05
            ],
            "max_abs_error": 2.8500434342535234e-06
          },
          "entropy_form": {
            "RT": 2478.957029602388,
            "kind": "ideal_mixing"
          },
          "hermite": [
            [
              0.0,
              1.2078651347631224,
              -0.006652489155389185,
              0.0033663811662900667
            ]
          ],
          "kind": "single_phase",
          "knots": [
            0.0,
            4.8965629009369143e-05
          ],
          "max_abs_error": 0.00048298238757837897,
          "phase": "FCC_A1#1",
          "x_hi": 4.8965629009369143e-05,
          "x_lo": 0.0
        },
        {
          "enthalpy": {
            "intercept": 1.333910897954703,
            "slope": -1.333910897954703
          },
          "entropy": {
            "intercept": 0.004881361248159695,
            "slope": -0.004881361248159695
          },
          "intercept": -0.12146695818584535,
          "kind": "two_phase",
          "left": {
            "phase": "FCC_A1#1",
            "x": 4.8965629009369143e-05
          },
          "mu_a_rel": -0.12146695818584535,
          "mu_b_rel": 0.0,
          "right": {
            "phase": "FCC_A1#2",
            "x": 1.0
          },
          "slope": 0.12146695818584535,
          "x_hi": 1.0,
          "x_lo": 4.8965629009369143e-05
        }
      ],
      "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": -0.12146101047983393,
          "energy_per_atom": -0.12146101047983393,
          "enthalpy": 1.3338455821685422,
          "entries_at_x": 1,
          "entropy": 0.004881122229235757,
          "formula": "",
          "nsites": null,
          "phase": "FCC_A1#1",
          "phase_kind": "solution",
          "spacegroup_number": null,
          "spacegroup_symbol": "",
          "theoretical": false,
          "x": 4.8965629009369143e-05
        },
        {
          "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-00Luk-LB",
    "builder_version": 1,
    "engine": {
      "numpy": "2.5.1",
      "pycalphad": "0.11.2",
      "python": "3.13.15"
    },
    "fit_tol": 1.0,
    "observed_at": "2026-09-03T00:00:33Z",
    "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-00Luk-LB.tdb",
    "source_sha256": "551dca3f5b93ef9a91d424cffab6b6b9e4545692562c4aa65b522617b47415da"
  },
  "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"
}