{
  "counts": {
    "above_hull": 0,
    "entries": 9,
    "intervals": 8,
    "vertices": 9
  },
  "elements": [
    "CU",
    "ND"
  ],
  "flags": [
    "has_intermediate_phases",
    "liquid_on_hull",
    "solution_phases"
  ],
  "isotherms": [
    {
      "element_reference": {
        "CU": {
          "energy": -9883.67161567878,
          "phase": "FCC_A1"
        },
        "ND": {
          "energy": -21194.350789415446,
          "phase": "DHCP"
        }
      },
      "intervals": [
        {
          "enthalpy": {
            "intercept": 0.0,
            "slope": -101501.81934459183
          },
          "entropy": {
            "intercept": 0.0,
            "slope": -26.19035998915077
          },
          "intercept": 0.0,
          "kind": "two_phase",
          "left": {
            "phase": "FCC_A1",
            "x": 0.0
          },
          "mu_a_rel": 0.0,
          "mu_b_rel": -93693.16351382653,
          "right": {
            "phase": "CU6ND",
            "x": 0.14285714285714285
          },
          "slope": -93693.16351382653,
          "x_hi": 0.14285714285714285,
          "x_lo": 0.0
        },
        {
          "enthalpy": {
            "intercept": 2360.760101573471,
            "slope": -118027.14005560613
          },
          "entropy": {
            "intercept": 8.430479988242958,
            "slope": -85.20371990685148
          },
          "intercept": -152.78750692118047,
          "kind": "two_phase",
          "left": {
            "phase": "CU6ND",
            "x": 0.14285714285714285
          },
          "mu_a_rel": -152.78750692118047,
          "mu_b_rel": -92776.43847229943,
          "right": {
            "phase": "CU5ND_D2D",
            "x": 0.16666666666666666
          },
          "slope": -92623.65096537826,
          "x_hi": 0.16666666666666666,
          "x_lo": 0.14285714285714285
        },
        {
          "enthalpy": {
            "intercept": -12678.879898426552,
            "slope": -27789.30005560598
          },
          "entropy": {
            "intercept": -4.226290011757279,
            "slope": -9.263099906850053
          },
          "intercept": -11418.81153142111,
          "kind": "two_phase",
          "left": {
            "phase": "CU5ND_D2D",
            "x": 0.16666666666666666
          },
          "mu_a_rel": -11418.81153142111,
          "mu_b_rel": -36446.318349799796,
          "right": {
            "phase": "CU4ND",
            "x": 0.2
          },
          "slope": -25027.506818378683,
          "x_hi": 0.2,
          "x_lo": 0.16666666666666666
        },
        {
          "enthalpy": {
            "intercept": -18210.29489842652,
            "slope": -132.22505560613175
          },
          "entropy": {
            "intercept": -8.154265011757165,
            "slope": 10.376775093149375
          },
          "intercept": -15779.100785171127,
          "kind": "two_phase",
          "left": {
            "phase": "CU4ND",
            "x": 0.2
          },
          "mu_a_rel": -15779.100785171127,
          "mu_b_rel": -19005.16133479972,
          "right": {
            "phase": "CU2ND",
            "x": 0.3333333333333333
          },
          "slope": -3226.0605496285925,
          "x_hi": 0.3333333333333333,
          "x_lo": 0.2
        },
        {
          "enthalpy": {
            "intercept": -22530.829898426557,
            "slope": 12829.37994439397
          },
          "entropy": {
            "intercept": -2.1639200117571993,
            "slope": -7.594259906850524
          },
          "intercept": -21885.65714692113,
          "kind": "two_phase",
          "left": {
            "phase": "CU2ND",
            "x": 0.3333333333333333
          },
          "mu_a_rel": -21885.65714692113,
          "mu_b_rel": -6792.048611299715,
          "right": {
            "phase": "CUND_B27",
            "x": 0.5
          },
          "slope": 15093.608535621415,
          "x_hi": 0.5,
          "x_lo": 0.3333333333333333
        },
        {
          "enthalpy": {
            "intercept": -16601.30168693603,
            "slope": 970.3235214129176
          },
          "entropy": {
            "intercept": 27.227479809985198,
            "slope": -66.37705955033532
          },
          "intercept": -24719.17479228314,
          "kind": "two_phase",
          "left": {
            "phase": "CUND_B27",
            "x": 0.5
          },
          "mu_a_rel": -24719.17479228314,
          "mu_b_rel": -3958.5309659377053,
          "right": {
            "phase": "LIQUID",
            "x": 0.6141697840187234
          },
          "slope": 20760.643826345433,
          "x_hi": 0.6141697840187234,
          "x_lo": 0.5
        },
        {
          "enthalpy": {
            "entropy_form": null,
            "hermite": [
              [
                -16005.358299361571,
                1415.5140585289405,
                292.11984503630924,
                -0.6722259777536692
              ],
              [
                -14298.39662177407,
                1997.750489982729,
                290.1173873165153,
                4.177239301176087
              ]
            ],
            "knots": [
              0.6141697840187234,
              0.6764876987694326,
              0.7388056082269757
            ],
            "max_abs_error": 0.0738374631600891
          },
          "entropy": {
            "entropy_form": {
              "R": 8.31446261815324,
              "kind": "ideal_mixing_entropy"
            },
            "hermite": [
              [
                -19.08377316066467,
                1.2984026717176065,
                1.6230968558658452,
                0.03690050119507848
              ]
            ],
            "knots": [
              0.6141697840187234,
              0.7388056082269757
            ],
            "max_abs_error": 2.8328586374470888e-06
          },
          "entropy_form": {
            "RT": 2478.957029602388,
            "kind": "ideal_mixing"
          },
          "hermite": [
            [
              -10315.531331509397,
              1221.9546720220405,
              171.1332476690261,
              -2.041864318736998
            ],
            [
              -8924.485276137071,
              1558.10178951463,
              165.00925219382498,
              2.802728526815372
            ]
          ],
          "kind": "single_phase",
          "knots": [
            0.6141697840187234,
            0.6764876987694326,
            0.7388056082269757
          ],
          "max_abs_error": 0.07434903813009441,
          "phase": "LIQUID",
          "x_hi": 0.7388056082269757,
          "x_lo": 0.6141697840187234
        },
        {
          "enthalpy": {
            "intercept": -45967.110639982915,
            "slope": 45967.110639982915
          },
          "entropy": {
            "intercept": -43.45558993875844,
            "slope": 43.45558993875844
          },
          "intercept": -33010.82649974209,
          "kind": "two_phase",
          "left": {
            "phase": "LIQUID",
            "x": 0.7388056082269757
          },
          "mu_a_rel": -33010.82649974209,
          "mu_b_rel": 0.0,
          "right": {
            "phase": "DHCP",
            "x": 1.0
          },
          "slope": 33010.82649974209,
          "x_hi": 1.0,
          "x_lo": 0.7388056082269757
        }
      ],
      "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": -13384.73764483236,
          "energy_per_atom": -13384.73764483236,
          "enthalpy": -14500.25990637026,
          "entries_at_x": 1,
          "entropy": -3.74147999845011,
          "formula": "",
          "nsites": null,
          "phase": "CU6ND",
          "phase_kind": "solution",
          "spacegroup_number": null,
          "spacegroup_symbol": "",
          "theoretical": false,
          "x": 0.14285714285714285
        },
        {
          "collinear": false,
          "degenerate": [],
          "energy": -15590.062667817556,
          "energy_per_atom": -15590.062667817556,
          "enthalpy": -17310.429907694215,
          "entries_at_x": 1,
          "entropy": -5.770139996232288,
          "formula": "",
          "nsites": null,
          "phase": "CU5ND_D2D",
          "phase_kind": "solution",
          "spacegroup_number": null,
          "spacegroup_symbol": "",
          "theoretical": false,
          "x": 0.16666666666666666
        },
        {
          "collinear": false,
          "degenerate": [],
          "energy": -16424.312895096846,
          "energy_per_atom": -16424.312895096846,
          "enthalpy": -18236.73990954775,
          "entries_at_x": 1,
          "entropy": -6.07890999312729,
          "formula": "",
          "nsites": null,
          "phase": "CU4ND",
          "phase_kind": "solution",
          "spacegroup_number": null,
          "spacegroup_symbol": "",
          "theoretical": false,
          "x": 0.2
        },
        {
          "collinear": false,
          "degenerate": [],
          "energy": -16854.45430171399,
          "energy_per_atom": -16854.45430171399,
          "enthalpy": -18254.3699169619,
          "entries_at_x": 1,
          "entropy": -4.695339980707374,
          "formula": "",
          "nsites": null,
          "phase": "CU2ND",
          "phase_kind": "solution",
          "spacegroup_number": null,
          "spacegroup_symbol": "",
          "theoretical": false,
          "x": 0.3333333333333333
        },
        {
          "collinear": false,
          "degenerate": [],
          "energy": -14338.852879110422,
          "energy_per_atom": -14338.852879110422,
          "enthalpy": -16116.13992622957,
          "entries_at_x": 1,
          "entropy": -5.961049965182461,
          "formula": "",
          "nsites": null,
          "phase": "CUND_B27",
          "phase_kind": "solution",
          "spacegroup_number": null,
          "spacegroup_symbol": "",
          "theoretical": false,
          "x": 0.5
        },
        {
          "collinear": false,
          "degenerate": [],
          "energy": -11968.614657366921,
          "energy_per_atom": -11968.614657366921,
          "enthalpy": -16005.358299361571,
          "entries_at_x": 1,
          "entropy": -13.539304517842183,
          "formula": "",
          "nsites": null,
          "phase": "LIQUID",
          "phase_kind": "solution",
          "spacegroup_number": null,
          "spacegroup_symbol": "",
          "theoretical": false,
          "x": 0.6141697840187234
        },
        {
          "collinear": false,
          "degenerate": [],
          "energy": -8622.242749524969,
          "energy_per_atom": -8622.242749524969,
          "enthalpy": -12006.35150517365,
          "entries_at_x": 1,
          "entropy": -11.350356383191965,
          "formula": "",
          "nsites": null,
          "phase": "LIQUID",
          "phase_kind": "solution",
          "spacegroup_number": null,
          "spacegroup_symbol": "",
          "theoretical": false,
          "x": 0.7388056082269757
        },
        {
          "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": "DHCP",
          "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": "CuNd-96Du",
    "builder_version": 1,
    "engine": {
      "numpy": "2.5.1",
      "pycalphad": "0.11.2",
      "python": "3.13.15"
    },
    "fit_tol": 1.0,
    "observed_at": "2026-09-03T00:31:15Z",
    "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/CuNd-96Du.tdb",
    "source_sha256": "3ca7c1071943556d2f79dabe947ced452caeaaa491fc8e89e825ef5ef741d67c"
  },
  "reference": {
    "kind": "calphad_formation_T",
    "per": "mole_atoms",
    "temperature_K": 298.15,
    "units": "J/mol-atoms"
  },
  "schema_version": 1,
  "system_id": "CU-ND",
  "x_element": "ND"
}
