{
  "counts": {
    "above_hull": 0,
    "entries": 5,
    "intervals": 4,
    "vertices": 5
  },
  "elements": [
    "U",
    "ZR"
  ],
  "flags": [
    "has_intermediate_phases",
    "solution_phases"
  ],
  "isotherms": [
    {
      "element_reference": {
        "U": {
          "energy": -14967.130368618553,
          "phase": "ORTHORHOMBIC_A20"
        },
        "ZR": {
          "energy": -11681.783796839938,
          "phase": "HCP_A3"
        }
      },
      "intervals": [
        {
          "enthalpy": {
            "entropy_form": null,
            "hermite": [
              [
                0.0,
                0.09732283494332804,
                0.005730180723657705,
                -0.0028495511745799673
              ]
            ],
            "knots": [
              0.0,
              3.233367462668685e-06
            ],
            "max_abs_error": 0.0004084461508486528
          },
          "entropy": {
            "entropy_form": {
              "R": 8.31446261815324,
              "kind": "ideal_mixing_entropy"
            },
            "hermite": [
              [
                0.0,
                -1.5926705096670174e-05,
                3.134801302437788e-05,
                -1.5589258125920113e-05
              ]
            ],
            "knots": [
              0.0,
              3.233367462668685e-06
            ],
            "max_abs_error": 2.2345304077628216e-06
          },
          "entropy_form": {
            "RT": 2478.957029602388,
            "kind": "ideal_mixing"
          },
          "hermite": [
            [
              0.0,
              0.10207138199876528,
              -0.0036162295373691894,
              0.0017983863827425312
            ]
          ],
          "kind": "single_phase",
          "knots": [
            0.0,
            3.233367462668685e-06
          ],
          "max_abs_error": 0.000257779056175203,
          "phase": "ORTHORHOMBIC_A20",
          "x_hi": 3.233367462668685e-06,
          "x_lo": 0.0
        },
        {
          "enthalpy": {
            "intercept": 0.10037445243337333,
            "slope": -52.88231014312512
          },
          "entropy": {
            "intercept": 0.00036347606128884694,
            "slope": 0.9597396494578482
          },
          "intercept": -0.007995935239760527,
          "kind": "two_phase",
          "left": {
            "phase": "ORTHORHOMBIC_A20",
            "x": 3.233367462668685e-06
          },
          "mu_a_rel": -0.007995935239760527,
          "mu_b_rel": -339.0366825642292,
          "right": {
            "phase": "UZR2_DELTA",
            "x": 0.6575733926575739
          },
          "slope": -339.0286866289894,
          "x_hi": 0.6575733926575739,
          "x_lo": 3.233367462668685e-06
        },
        {
          "enthalpy": {
            "entropy_form": null,
            "hermite": [
              [
                -34.673625639951446,
                -28.783756636914962,
                32.94324426394184,
                0.7788050125507837
              ]
            ],
            "knots": [
              0.6575733926575739,
              0.7363001722047713
            ],
            "max_abs_error": 3.671922909376235e-05
          },
          "entropy": {
            "entropy_form": {
              "R": 8.31446261815324,
              "kind": "ideal_mixing_entropy"
            },
            "hermite": [
              [
                -4.711676402325194,
                0.42007604282246974,
                0.055544259840307975,
                0.02307993102678263
              ]
            ],
            "knots": [
              0.6575733926575739,
              0.7363001722047713
            ],
            "max_abs_error": 2.990115000844895e-05
          },
          "entropy_form": {
            "RT": 2478.957029602388,
            "kind": "ideal_mixing"
          },
          "hermite": [
            [
              1370.1126937133008,
              -154.02942880383958,
              16.38272319131994,
              -6.102476422441953
            ]
          ],
          "kind": "single_phase",
          "knots": [
            0.6575733926575739,
            0.7363001722047713
          ],
          "max_abs_error": 0.008914599071886187,
          "phase": "UZR2_DELTA",
          "x_hi": 0.7363001722047713,
          "x_lo": 0.6575733926575739
        },
        {
          "enthalpy": {
            "intercept": -112.76204936873987,
            "slope": 112.76204936873985
          },
          "entropy": {
            "intercept": 2.2129913659717326,
            "slope": -2.2129913659717326
          },
          "intercept": -772.5654251332189,
          "kind": "two_phase",
          "left": {
            "phase": "UZR2_DELTA",
            "x": 0.7363001722047713
          },
          "mu_a_rel": -772.5654251332189,
          "mu_b_rel": 0.0,
          "right": {
            "phase": "HCP_A3",
            "x": 1.0
          },
          "slope": 772.5654251332189,
          "x_hi": 1.0,
          "x_lo": 0.7363001722047713
        }
      ],
      "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": "ORTHORHOMBIC_A20",
          "phase_kind": "solution",
          "spacegroup_number": null,
          "spacegroup_symbol": "",
          "theoretical": false,
          "x": 0.0
        },
        {
          "collinear": false,
          "degenerate": [],
          "energy": -0.009092139564017998,
          "energy_per_atom": -0.009092139564017998,
          "enthalpy": 0.10020346449240579,
          "entries_at_x": 1,
          "entropy": 0.000366579252244037,
          "formula": "",
          "nsites": null,
          "phase": "ORTHORHOMBIC_A20",
          "phase_kind": "solution",
          "spacegroup_number": null,
          "spacegroup_symbol": "",
          "theoretical": false,
          "x": 3.233367462668685e-06
        },
        {
          "collinear": false,
          "degenerate": [],
          "energy": -222.9442396101058,
          "energy_per_atom": -222.9442396101058,
          "enthalpy": -34.673625639951446,
          "entries_at_x": 1,
          "entropy": 0.6314627334232767,
          "formula": "",
          "nsites": null,
          "phase": "UZR2_DELTA",
          "phase_kind": "solution",
          "spacegroup_number": null,
          "spacegroup_symbol": "",
          "theoretical": false,
          "x": 0.6575733926575739
        },
        {
          "collinear": false,
          "degenerate": [],
          "energy": -203.72536956817748,
          "energy_per_atom": -203.72536956817748,
          "enthalpy": -29.735333000373778,
          "entries_at_x": 1,
          "entropy": 0.5835654421190739,
          "formula": "",
          "nsites": null,
          "phase": "UZR2_DELTA",
          "phase_kind": "solution",
          "spacegroup_number": null,
          "spacegroup_symbol": "",
          "theoretical": false,
          "x": 0.7363001722047713
        },
        {
          "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": "UZr-18Qua",
    "builder_version": 1,
    "engine": {
      "numpy": "2.5.1",
      "pycalphad": "0.11.2",
      "python": "3.13.15"
    },
    "fit_tol": 1.0,
    "observed_at": "2026-09-03T01:04:44Z",
    "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/UZr-18Qua.tdb",
    "source_sha256": "03a5d10eb8a85d302f4d569f32fc5bcadc8a11dd99177506228d1724e55a18cc"
  },
  "reference": {
    "kind": "calphad_formation_T",
    "per": "mole_atoms",
    "temperature_K": 298.15,
    "units": "J/mol-atoms"
  },
  "schema_version": 1,
  "system_id": "U-ZR",
  "x_element": "ZR"
}
