{
  "counts": {
    "above_hull": 0,
    "entries": 5,
    "intervals": 4,
    "vertices": 5
  },
  "elements": [
    "FE",
    "ZR"
  ],
  "flags": [
    "has_intermediate_phases",
    "solution_phases"
  ],
  "isotherms": [
    {
      "element_reference": {
        "FE": {
          "energy": -8133.457574934752,
          "phase": "BCC_A2"
        },
        "ZR": {
          "energy": -11681.783818024625,
          "phase": "HCP_A3"
        }
      },
      "intervals": [
        {
          "enthalpy": {
            "intercept": 0.0,
            "slope": -89260.72852384548
          },
          "entropy": {
            "intercept": 0.0,
            "slope": -1.3766066320370909
          },
          "intercept": 0.0,
          "kind": "two_phase",
          "left": {
            "phase": "BCC_A2",
            "x": 0.0
          },
          "mu_a_rel": 0.0,
          "mu_b_rel": -88850.2932565036,
          "right": {
            "phase": "C15_LAVES",
            "x": 0.3332510712296729
          },
          "slope": -88850.2932565036,
          "x_hi": 0.3332510712296729,
          "x_lo": 0.0
        },
        {
          "enthalpy": {
            "entropy_form": null,
            "hermite": [
              [
                -29746.233399312525,
                -9.19327222732768,
                -1.1203989931727438,
                1.1328954823893174
              ]
            ],
            "knots": [
              0.3332510712296729,
              0.3333333956931802
            ],
            "max_abs_error": 0.16252432324108668
          },
          "entropy": {
            "entropy_form": {
              "R": 8.31446261815324,
              "kind": "ideal_mixing_entropy"
            },
            "hermite": [
              [
                -5.75055467786009,
                -0.006775900220977231,
                0.00045774466234635436,
                -0.0011274673885952324
              ]
            ],
            "knots": [
              0.3332510712296729,
              0.3333333956931802
            ],
            "max_abs_error": 8.162079151485813e-05
          },
          "entropy_form": {
            "RT": 2478.957029602388,
            "kind": "ideal_mixing"
          },
          "hermite": [
            [
              -28031.705522108532,
              -7.173037575847893,
              -1.256875564753349,
              1.469049884175396
            ]
          ],
          "kind": "single_phase",
          "knots": [
            0.3332510712296729,
            0.3333333956931802
          ],
          "max_abs_error": 0.1854536666178319,
          "phase": "C15_LAVES",
          "x_hi": 0.3333333956931802,
          "x_lo": 0.3332510712296729
        },
        {
          "enthalpy": {
            "intercept": -43653.62610120005,
            "slope": 41694.62797823635
          },
          "entropy": {
            "intercept": -0.9046928405376777,
            "slope": 1.3168982256292834
          },
          "intercept": -43383.891930793754,
          "kind": "two_phase",
          "left": {
            "phase": "C15_LAVES",
            "x": 0.3333333956931802
          },
          "mu_a_rel": -43383.891930793754,
          "mu_b_rel": -2081.897158528758,
          "right": {
            "phase": "FEZR3_E1A",
            "x": 0.75
          },
          "slope": 41301.994772264996,
          "x_hi": 0.75,
          "x_lo": 0.3333333956931802
        },
        {
          "enthalpy": {
            "intercept": -49530.62047009113,
            "slope": 49530.62047009113
          },
          "entropy": {
            "intercept": 0.3319233147371392,
            "slope": -0.3319233147371392
          },
          "intercept": -49629.58340638003,
          "kind": "two_phase",
          "left": {
            "phase": "FEZR3_E1A",
            "x": 0.75
          },
          "mu_a_rel": -49629.58340638003,
          "mu_b_rel": 0.0,
          "right": {
            "phase": "HCP_A3",
            "x": 1.0
          },
          "slope": 49629.58340638003,
          "x_hi": 1.0,
          "x_lo": 0.75
        }
      ],
      "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": "BCC_A2",
          "phase_kind": "solution",
          "spacegroup_number": null,
          "spacegroup_symbol": "",
          "theoretical": false,
          "x": 0.0
        },
        {
          "collinear": false,
          "degenerate": [],
          "energy": -29609.455406800407,
          "energy_per_atom": -29609.455406800407,
          "enthalpy": -29746.233399312525,
          "entries_at_x": 1,
          "entropy": -0.45875563478823267,
          "formula": "",
          "nsites": null,
          "phase": "C15_LAVES",
          "phase_kind": "solution",
          "spacegroup_number": null,
          "spacegroup_symbol": "",
          "theoretical": false,
          "x": 0.3332510712296729
        },
        {
          "collinear": false,
          "degenerate": [],
          "energy": -29616.557764452686,
          "energy_per_atom": -29616.557764452686,
          "enthalpy": -29755.414175050646,
          "entries_at_x": 1,
          "entropy": -0.4657266832063449,
          "formula": "",
          "nsites": null,
          "phase": "C15_LAVES",
          "phase_kind": "solution",
          "spacegroup_number": null,
          "spacegroup_symbol": "",
          "theoretical": false,
          "x": 0.3333333956931802
        },
        {
          "collinear": false,
          "degenerate": [],
          "energy": -12407.395851595007,
          "energy_per_atom": -12407.395851595007,
          "enthalpy": -12382.655117522783,
          "entries_at_x": 1,
          "entropy": 0.0829808286842848,
          "formula": "",
          "nsites": null,
          "phase": "FEZR3_E1A",
          "phase_kind": "solution",
          "spacegroup_number": null,
          "spacegroup_symbol": "",
          "theoretical": false,
          "x": 0.75
        },
        {
          "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": "HCP_A3",
          "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": "FeZr-19Sae",
    "builder_version": 1,
    "engine": {
      "numpy": "2.5.1",
      "pycalphad": "0.11.2",
      "python": "3.13.15"
    },
    "fit_tol": 1.0,
    "observed_at": "2026-09-03T00:38:17Z",
    "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/FeZr-19Sae.tdb",
    "source_sha256": "6a4533b5c68b993cb57b938d41eaa83666920aecc7bb961d982729394d6a692c"
  },
  "reference": {
    "kind": "calphad_formation_T",
    "per": "mole_atoms",
    "temperature_K": 298.15,
    "units": "J/mol-atoms"
  },
  "schema_version": 1,
  "system_id": "FE-ZR",
  "x_element": "ZR"
}