{
  "counts": {
    "above_hull": 0,
    "entries": 4,
    "intervals": 3,
    "vertices": 4
  },
  "elements": [
    "PB",
    "SB"
  ],
  "flags": [
    "no_intermediate_phases",
    "solution_phases"
  ],
  "isotherms": [
    {
      "element_reference": {
        "PB": {
          "energy": -19320.120414092362,
          "phase": "FCC_A1"
        },
        "SB": {
          "energy": -13572.360731923616,
          "phase": "RHOMBOHEDRAL_A7"
        }
      },
      "intervals": [
        {
          "enthalpy": {
            "entropy_form": null,
            "hermite": [
              [
                0.0,
                8.233681804497305,
                0.005118920758020451,
                -0.002939209601075632
              ]
            ],
            "knots": [
              0.0,
              0.00026337160400456976
            ],
            "max_abs_error": 0.000421650717661759
          },
          "entropy": {
            "entropy_form": {
              "R": 8.31446261815324,
              "kind": "ideal_mixing_entropy"
            },
            "hermite": [
              [
                0.0,
                0.00955735466861397,
                3.570066770117522e-05,
                -1.8542329972497107e-05
              ]
            ],
            "knots": [
              0.0,
              0.00026337160400456976
            ],
            "max_abs_error": 2.661261759809297e-06
          },
          "entropy_form": {
            "RT": 2478.957029602388,
            "kind": "ideal_mixing"
          },
          "hermite": [
            [
              0.0,
              5.384156509702327,
              -0.005525232811422143,
              0.0025891859233517778
            ]
          ],
          "kind": "single_phase",
          "knots": [
            0.0,
            0.00026337160400456976
          ],
          "max_abs_error": 0.0003718044116596264,
          "phase": "FCC_A1",
          "x_hi": 0.00026337160400456976,
          "x_lo": 0.0
        },
        {
          "enthalpy": {
            "intercept": 8.236421407599284,
            "slope": -2.12586298796385
          },
          "entropy": {
            "intercept": 0.02981401116742541,
            "slope": -0.006977637148911264
          },
          "intercept": -0.6526260219675345,
          "kind": "two_phase",
          "left": {
            "phase": "FCC_A1",
            "x": 0.00026337160400456976
          },
          "mu_a_rel": -0.6526260219675345,
          "mu_b_rel": -0.6981064939839108,
          "right": {
            "phase": "RHOMBOHEDRAL_A7",
            "x": 0.9997177801789072
          },
          "slope": -0.04548047201637627,
          "x_hi": 0.9997177801789072,
          "x_lo": 0.00026337160400456976
        },
        {
          "enthalpy": {
            "entropy_form": null,
            "hermite": [
              [
                6.111158380307565,
                -6.109478758752812,
                -0.0037152986914970043,
                0.0020356771367442406
              ]
            ],
            "knots": [
              0.9997177801789072,
              1.0
            ],
            "max_abs_error": 0.00029203517894904607
          },
          "entropy": {
            "entropy_form": {
              "R": 8.31446261815324,
              "kind": "ideal_mixing_entropy"
            },
            "hermite": [
              [
                0.0013145857752569455,
                -0.0013143289710360838,
                -1.9441028384160506e-05,
                1.9184224163298815e-05
              ]
            ],
            "knots": [
              0.9997177801789072,
              1.0
            ],
            "max_abs_error": 2.753445275872142e-06
          },
          "entropy_form": {
            "RT": 2478.957029602388,
            "kind": "ideal_mixing"
          },
          "hermite": [
            [
              5.719214631415355,
              -5.717611576286174,
              0.002081044313195335,
              -0.00368409944237591
            ]
          ],
          "kind": "single_phase",
          "knots": [
            0.9997177801789072,
            1.0
          ],
          "max_abs_error": 0.0005289044969098988,
          "phase": "RHOMBOHEDRAL_A7",
          "x_hi": 1.0,
          "x_lo": 0.9997177801789072
        }
      ],
      "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",
          "phase_kind": "solution",
          "spacegroup_number": null,
          "spacegroup_symbol": "",
          "theoretical": false,
          "x": 0.0
        },
        {
          "collinear": false,
          "degenerate": [],
          "energy": -0.6526380002324004,
          "energy_per_atom": -0.6526380002324004,
          "enthalpy": 8.23586151565425,
          "entries_at_x": 1,
          "entropy": 0.02981217345593734,
          "formula": "",
          "nsites": null,
          "phase": "FCC_A1",
          "phase_kind": "solution",
          "spacegroup_number": null,
          "spacegroup_symbol": "",
          "theoretical": false,
          "x": 0.00026337160400456976
        },
        {
          "collinear": false,
          "degenerate": [],
          "energy": -0.6980936584932351,
          "energy_per_atom": -0.6980936584932351,
          "enthalpy": 6.111158380307565,
          "entries_at_x": 1,
          "entropy": 0.022838343246021964,
          "formula": "",
          "nsites": null,
          "phase": "RHOMBOHEDRAL_A7",
          "phase_kind": "solution",
          "spacegroup_number": null,
          "spacegroup_symbol": "",
          "theoretical": false,
          "x": 0.9997177801789072
        },
        {
          "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": "RHOMBOHEDRAL_A7",
          "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": "PbSb-95Oht-LB",
    "builder_version": 1,
    "engine": {
      "numpy": "2.5.1",
      "pycalphad": "0.11.2",
      "python": "3.13.15"
    },
    "fit_tol": 1.0,
    "observed_at": "2026-09-03T00:56:27Z",
    "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/PbSb-95Oht-LB.tdb",
    "source_sha256": "138f59b0ca163055283c46560aeb85ad4ea81774ae3d20a8eb2e85e7fd2a27b4"
  },
  "reference": {
    "kind": "calphad_formation_T",
    "per": "mole_atoms",
    "temperature_K": 298.15,
    "units": "J/mol-atoms"
  },
  "schema_version": 1,
  "system_id": "PB-SB",
  "x_element": "SB"
}