{
  "counts": {
    "above_hull": 0,
    "entries": 4,
    "intervals": 3,
    "vertices": 4
  },
  "elements": [
    "TI",
    "ZR"
  ],
  "flags": [
    "miscibility_gap",
    "no_intermediate_phases",
    "solution_phases"
  ],
  "isotherms": [
    {
      "element_reference": {
        "TI": {
          "energy": -9159.168153506009,
          "phase": "HCP_A3"
        },
        "ZR": {
          "energy": -11681.783824130618,
          "phase": "HCP_A3"
        }
      },
      "intervals": [
        {
          "enthalpy": {
            "entropy_form": null,
            "hermite": [
              [
                0.0,
                1756.8196778008557,
                -601.2882346871696,
                -0.0004174671465762003
              ]
            ],
            "knots": [
              0.0,
              0.3422599150839183
            ],
            "max_abs_error": 6.834942769273766e-05
          },
          "entropy": {
            "entropy_form": {
              "R": 8.31446261815324,
              "kind": "ideal_mixing_entropy"
            },
            "hermite": [
              [
                0.0,
                7.068755030259731e-05,
                -7.855639953314498e-05,
                3.17042617515926e-05
              ]
            ],
            "knots": [
              0.0,
              0.3422599150839183
            ],
            "max_abs_error": 3.003649088567798e-06
          },
          "entropy_form": {
            "RT": 2478.957029602388,
            "kind": "ideal_mixing"
          },
          "hermite": [
            [
              0.0,
              1756.7986023078322,
              -601.2648130975838,
              -0.00987009195068822
            ]
          ],
          "kind": "single_phase",
          "knots": [
            0.0,
            0.3422599150839183
          ],
          "max_abs_error": 0.0009624734341286967,
          "phase": "HCP_A3#1",
          "x_hi": 0.3422599150839183,
          "x_lo": 0.0
        },
        {
          "enthalpy": {
            "intercept": 1155.531025646578,
            "slope": -1.1171199670789765e-10
          },
          "entropy": {
            "intercept": 5.342258117013784,
            "slope": 1.692161974648876e-08
          },
          "intercept": -437.2632319410757,
          "kind": "two_phase",
          "left": {
            "phase": "HCP_A3#1",
            "x": 0.3422599150839183
          },
          "mu_a_rel": -437.2632319410757,
          "mu_b_rel": -437.2632369863815,
          "right": {
            "phase": "HCP_A3#2",
            "x": 0.6577400849161116
          },
          "slope": -5.045305844400975e-06,
          "x_hi": 0.6577400849161116,
          "x_lo": 0.3422599150839183
        },
        {
          "enthalpy": {
            "entropy_form": null,
            "hermite": [
              [
                1155.5310256465045,
                -554.2419174339454,
                -601.2895907139327,
                0.0004825013736535766
              ]
            ],
            "knots": [
              0.6577400849161116,
              1.0
            ],
            "max_abs_error": 6.961785959447298e-05
          },
          "entropy": {
            "entropy_form": {
              "R": 8.31446261815324,
              "kind": "ideal_mixing_entropy"
            },
            "hermite": [
              [
                2.384075111816486e-05,
                -8.351157834113018e-06,
                1.7237847910934483e-05,
                -3.272744119498633e-05
              ]
            ],
            "knots": [
              0.6577400849161116,
              1.0
            ],
            "max_abs_error": 3.217351273113309e-06
          },
          "entropy_form": {
            "RT": 2478.957029602388,
            "kind": "ideal_mixing"
          },
          "hermite": [
            [
              1155.5239175265558,
              -554.2394275359316,
              -601.2947301792667,
              0.010240188642683279
            ]
          ],
          "kind": "single_phase",
          "knots": [
            0.6577400849161116,
            1.0
          ],
          "max_abs_error": 0.0010273360389874142,
          "phase": "HCP_A3#2",
          "x_hi": 1.0,
          "x_lo": 0.6577400849161116
        }
      ],
      "phase_instances": {
        "HCP_A3#1": "HCP_A3",
        "HCP_A3#2": "HCP_A3"
      },
      "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": "HCP_A3#1",
          "phase_kind": "solution",
          "spacegroup_number": null,
          "spacegroup_symbol": "",
          "theoretical": false,
          "x": 0.0
        },
        {
          "collinear": false,
          "degenerate": [],
          "energy": -437.26323366788165,
          "energy_per_atom": -437.26323366788165,
          "enthalpy": 1155.5310256465398,
          "entries_at_x": 1,
          "entropy": 5.342258122805376,
          "formula": "",
          "nsites": null,
          "phase": "HCP_A3#1",
          "phase_kind": "solution",
          "spacegroup_number": null,
          "spacegroup_symbol": "",
          "theoretical": false,
          "x": 0.3422599150839183
        },
        {
          "collinear": false,
          "degenerate": [],
          "energy": -437.2632352595756,
          "energy_per_atom": -437.2632352595756,
          "enthalpy": 1155.5310256465045,
          "entries_at_x": 1,
          "entropy": 5.342258128143811,
          "formula": "",
          "nsites": null,
          "phase": "HCP_A3#2",
          "phase_kind": "solution",
          "spacegroup_number": null,
          "spacegroup_symbol": "",
          "theoretical": false,
          "x": 0.6577400849161116
        },
        {
          "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#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": "TiZr-94Har-LB",
    "builder_version": 1,
    "engine": {
      "numpy": "2.5.1",
      "pycalphad": "0.11.2",
      "python": "3.13.15"
    },
    "fit_tol": 1.0,
    "observed_at": "2026-09-03T01:03:58Z",
    "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/TiZr-94Har-LB.tdb",
    "source_sha256": "a3a08b354c28b6a1e4566ddc499da241fc897efa823b0e23a803c3d005f02612"
  },
  "reference": {
    "kind": "calphad_formation_T",
    "per": "mole_atoms",
    "temperature_K": 298.15,
    "units": "J/mol-atoms"
  },
  "schema_version": 1,
  "system_id": "TI-ZR",
  "x_element": "ZR"
}