{
  "counts": {
    "above_hull": 0,
    "entries": 9,
    "intervals": 8,
    "vertices": 9
  },
  "elements": [
    "AL",
    "ZR"
  ],
  "flags": [
    "has_intermediate_phases",
    "solution_phases"
  ],
  "isotherms": [
    {
      "element_reference": {
        "AL": {
          "energy": -8437.646152595318,
          "phase": "FCC_A1"
        },
        "ZR": {
          "energy": -11681.783927113747,
          "phase": "HCP_A3"
        }
      },
      "intervals": [
        {
          "enthalpy": {
            "intercept": 0.0,
            "slope": -187119.98372803538
          },
          "entropy": {
            "intercept": 0.0,
            "slope": -15.03452656080107
          },
          "intercept": 0.0,
          "kind": "two_phase",
          "left": {
            "phase": "FCC_A1",
            "x": 0.0
          },
          "mu_a_rel": 0.0,
          "mu_b_rel": -182637.43963393255,
          "right": {
            "phase": "AL3ZR_D023",
            "x": 0.25
          },
          "slope": -182637.43963393255,
          "x_hi": 0.25,
          "x_lo": 0.0
        },
        {
          "enthalpy": {
            "intercept": -32311.19856271012,
            "slope": -57875.1894771949
          },
          "entropy": {
            "intercept": -5.0436123597010365,
            "slope": 5.139922878003078
          },
          "intercept": -30807.44553766523,
          "kind": "two_phase",
          "left": {
            "phase": "AL3ZR_D023",
            "x": 0.25
          },
          "mu_a_rel": -30807.44553766523,
          "mu_b_rel": -90215.10302093686,
          "right": {
            "phase": "AL2ZR_C14",
            "x": 0.3333333333333333
          },
          "slope": -59407.65748327163,
          "x_hi": 0.3333333333333333,
          "x_lo": 0.25
        },
        {
          "enthalpy": {
            "intercept": -60119.11436271005,
            "slope": 25548.55792280489
          },
          "entropy": {
            "intercept": -9.812547243522143,
            "slope": 19.446727529466397
          },
          "intercept": -57193.50340205405,
          "kind": "two_phase",
          "left": {
            "phase": "AL2ZR_C14",
            "x": 0.3333333333333333
          },
          "mu_a_rel": -57193.50340205405,
          "mu_b_rel": -37442.9872921592,
          "right": {
            "phase": "AL3ZR2",
            "x": 0.4
          },
          "slope": 19750.51610989484,
          "x_hi": 0.4,
          "x_lo": 0.3333333333333333
        },
        {
          "enthalpy": {
            "intercept": -68189.37656271005,
            "slope": 45724.2134228049
          },
          "entropy": {
            "intercept": -8.647658710479947,
            "slope": 16.534506196860907
          },
          "intercept": -65611.0771181804,
          "kind": "two_phase",
          "left": {
            "phase": "AL3ZR2",
            "x": 0.4
          },
          "mu_a_rel": -65611.0771181804,
          "mu_b_rel": -24816.626717969695,
          "right": {
            "phase": "ALZR_B33",
            "x": 0.5
          },
          "slope": 40794.450400210706,
          "x_hi": 0.5,
          "x_lo": 0.4
        },
        {
          "enthalpy": {
            "intercept": -73369.49981271019,
            "slope": 56084.45992280515
          },
          "entropy": {
            "intercept": -2.005595544507003,
            "slope": 3.2503798649150193
          },
          "intercept": -72771.5315011154,
          "kind": "two_phase",
          "left": {
            "phase": "ALZR_B33",
            "x": 0.5
          },
          "mu_a_rel": -72771.5315011154,
          "mu_b_rel": -17656.172335034687,
          "right": {
            "phase": "ALZR2_B82",
            "x": 0.6666666666666666
          },
          "slope": 55115.359166080714,
          "x_hi": 0.6666666666666666,
          "x_lo": 0.5
        },
        {
          "enthalpy": {
            "intercept": -91867.85981270998,
            "slope": 83831.99992280485
          },
          "entropy": {
            "intercept": 4.866204455493031,
            "slope": -7.057320135085032
          },
          "intercept": -93318.71867111526,
          "kind": "two_phase",
          "left": {
            "phase": "ALZR2_B82",
            "x": 0.6666666666666666
          },
          "mu_a_rel": -93318.71867111526,
          "mu_b_rel": -7382.578750034751,
          "right": {
            "phase": "ALZR3_L12",
            "x": 0.75
          },
          "slope": 85936.13992108051,
          "x_hi": 0.75,
          "x_lo": 0.6666666666666666
        },
        {
          "enthalpy": {
            "intercept": -115996.07067382308,
            "slope": 116002.94773762232
          },
          "entropy": {
            "intercept": -1.8047442432704108,
            "slope": 1.8372781299328902
          },
          "intercept": -115457.98617769199,
          "kind": "two_phase",
          "left": {
            "phase": "ALZR3_L12",
            "x": 0.75
          },
          "mu_a_rel": -115457.98617769199,
          "mu_b_rel": -2.82291450916091,
          "right": {
            "phase": "HCP_A3",
            "x": 0.998821980058765
          },
          "slope": 115455.16326318283,
          "x_hi": 0.998821980058765,
          "x_lo": 0.75
        },
        {
          "enthalpy": {
            "entropy_form": null,
            "hermite": [
              [
                -129.77672187772043,
                129.8590279656171,
                -0.07134474192673679,
                -0.010961345969917602
              ]
            ],
            "knots": [
              0.998821980058765,
              1.0
            ],
            "max_abs_error": 0.0014845909653686817
          },
          "entropy": {
            "entropy_form": {
              "R": 8.31446261815324,
              "kind": "ideal_mixing_entropy"
            },
            "hermite": [
              [
                -0.04547331507337833,
                0.04541709529219797,
                4.406759001700927e-05,
                1.2152191163364301e-05
              ]
            ],
            "knots": [
              0.998821980058765,
              1.0
            ],
            "max_abs_error": 1.7487945291987106e-06
          },
          "entropy_form": {
            "RT": 2478.957029602388,
            "kind": "ideal_mixing"
          },
          "hermite": [
            [
              -116.21885298859434,
              116.31792100469147,
              -0.08448349469237826,
              -0.014584521404756856
            ]
          ],
          "kind": "single_phase",
          "knots": [
            0.998821980058765,
            1.0
          ],
          "max_abs_error": 0.0020059940974519463,
          "phase": "HCP_A3",
          "x_hi": 1.0,
          "x_lo": 0.998821980058765
        }
      ],
      "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": -45659.35990848314,
          "energy_per_atom": -45659.35990848314,
          "enthalpy": -46779.995932008846,
          "entries_at_x": 1,
          "entropy": -3.7586316402002673,
          "formula": "",
          "nsites": null,
          "phase": "AL3ZR_D023",
          "phase_kind": "solution",
          "spacegroup_number": null,
          "spacegroup_symbol": "",
          "theoretical": false,
          "x": 0.25
        },
        {
          "collinear": false,
          "degenerate": [],
          "energy": -50609.998032089105,
          "energy_per_atom": -50609.998032089105,
          "enthalpy": -51602.92838844175,
          "entries_at_x": 1,
          "entropy": -3.330304733700011,
          "formula": "",
          "nsites": null,
          "phase": "AL2ZR_C14",
          "phase_kind": "solution",
          "spacegroup_number": null,
          "spacegroup_symbol": "",
          "theoretical": false,
          "x": 0.3333333333333333
        },
        {
          "collinear": false,
          "degenerate": [],
          "energy": -49293.296958096114,
          "energy_per_atom": -49293.296958096114,
          "enthalpy": -49899.69119358809,
          "entries_at_x": 1,
          "entropy": -2.0338562317355837,
          "formula": "",
          "nsites": null,
          "phase": "AL3ZR2",
          "phase_kind": "solution",
          "spacegroup_number": null,
          "spacegroup_symbol": "",
          "theoretical": false,
          "x": 0.4
        },
        {
          "collinear": false,
          "degenerate": [],
          "energy": -45213.851918075045,
          "energy_per_atom": -45213.851918075045,
          "enthalpy": -45327.2698513076,
          "entries_at_x": 1,
          "entropy": -0.3804056120494934,
          "formula": "",
          "nsites": null,
          "phase": "ALZR_B33",
          "phase_kind": "solution",
          "spacegroup_number": null,
          "spacegroup_symbol": "",
          "theoretical": false,
          "x": 0.5
        },
        {
          "collinear": false,
          "degenerate": [],
          "energy": -36027.95872372826,
          "energy_per_atom": -36027.95872372826,
          "enthalpy": -35979.85986417341,
          "entries_at_x": 1,
          "entropy": 0.161324365436343,
          "formula": "",
          "nsites": null,
          "phase": "ALZR2_B82",
          "phase_kind": "solution",
          "spacegroup_number": null,
          "spacegroup_symbol": "",
          "theoretical": false,
          "x": 0.6666666666666666
        },
        {
          "collinear": false,
          "degenerate": [],
          "energy": -28866.61373030488,
          "energy_per_atom": -28866.61373030488,
          "enthalpy": -28993.85987060634,
          "entries_at_x": 1,
          "entropy": -0.4267856458207433,
          "formula": "",
          "nsites": null,
          "phase": "ALZR3_L12",
          "phase_kind": "solution",
          "spacegroup_number": null,
          "spacegroup_symbol": "",
          "theoretical": false,
          "x": 0.75
        },
        {
          "collinear": false,
          "degenerate": [],
          "energy": -138.8313991517516,
          "energy_per_atom": -138.8313991517516,
          "enthalpy": -129.77672187772043,
          "entries_at_x": 1,
          "entropy": 0.03036953638782336,
          "formula": "",
          "nsites": null,
          "phase": "HCP_A3",
          "phase_kind": "solution",
          "spacegroup_number": null,
          "spacegroup_symbol": "",
          "theoretical": false,
          "x": 0.998821980058765
        },
        {
          "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": "AlZr-18Khv",
    "builder_version": 1,
    "engine": {
      "numpy": "2.5.1",
      "pycalphad": "0.11.2",
      "python": "3.13.15"
    },
    "fit_tol": 1.0,
    "observed_at": "2026-09-03T00:15:27Z",
    "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/AlZr-18Khv.tdb",
    "source_sha256": "c638fa151494d0c0b87160913084f1a9b8dd9b85f1a933eab78e37d639999033"
  },
  "reference": {
    "kind": "calphad_formation_T",
    "per": "mole_atoms",
    "temperature_K": 298.15,
    "units": "J/mol-atoms"
  },
  "schema_version": 1,
  "system_id": "AL-ZR",
  "x_element": "ZR"
}