{
  "counts": {
    "above_hull": 0,
    "entries": 4,
    "intervals": 3,
    "vertices": 4
  },
  "elements": [
    "CU",
    "NI"
  ],
  "flags": [
    "miscibility_gap",
    "no_intermediate_phases",
    "solution_phases"
  ],
  "isotherms": [
    {
      "element_reference": {
        "CU": {
          "energy": -9883.671555250135,
          "phase": "FCC_A1"
        },
        "NI": {
          "energy": -8883.518781565206,
          "phase": "FCC_A1"
        }
      },
      "intervals": [
        {
          "enthalpy": {
            "entropy_form": null,
            "hermite": [
              [
                0.0,
                326.83466869911166,
                -3.3388127552431683,
                -0.29448613877741536
              ]
            ],
            "knots": [
              0.0,
              0.041658984689168004
            ],
            "max_abs_error": 0.00023854499022490927
          },
          "entropy": {
            "entropy_form": {
              "R": 8.31446261815324,
              "kind": "ideal_mixing_entropy"
            },
            "hermite": [
              [
                0.0,
                -0.049666931176245425,
                0.011146711633982107,
                -0.00015125914470242446
              ]
            ],
            "knots": [
              0.0,
              0.041658984689168004
            ],
            "max_abs_error": 1.9668255357534192e-06
          },
          "entropy_form": {
            "RT": 2478.957029602388,
            "kind": "ideal_mixing"
          },
          "hermite": [
            [
              0.0,
              341.6428642295046,
              -6.662204829142524,
              -0.24938822475138522
            ]
          ],
          "kind": "single_phase",
          "knots": [
            0.0,
            0.041658984689168004
          ],
          "max_abs_error": 0.0004031668433270852,
          "phase": "FCC_A1#1",
          "x_hi": 0.041658984689168004,
          "x_lo": 0.0
        },
        {
          "enthalpy": {
            "intercept": 335.17146918068994,
            "slope": -287.33536030490984
          },
          "entropy": {
            "intercept": 1.4539453610291089,
            "slope": -1.2652468184987833
          },
          "intercept": -98.32234021013807,
          "kind": "two_phase",
          "left": {
            "phase": "FCC_A1#1",
            "x": 0.041658984689168004
          },
          "mu_a_rel": -98.32234021013807,
          "mu_b_rel": -8.424361579636908,
          "right": {
            "phase": "FCC_A1#2",
            "x": 0.9965319692472823
          },
          "slope": 89.89797863050116,
          "x_hi": 0.9965319692472823,
          "x_lo": 0.041658984689168004
        },
        {
          "enthalpy": {
            "entropy_form": null,
            "hermite": [
              [
                48.83259674166074,
                -48.66640645620601,
                -0.1677314395694367,
                0.0015411541146974628
              ]
            ],
            "knots": [
              0.9965319692472823,
              1.0
            ],
            "max_abs_error": 0.0001905761924980709
          },
          "entropy": {
            "entropy_form": {
              "R": 8.31446261815324,
              "kind": "ideal_mixing_entropy"
            },
            "hermite": [
              [
                0.0009764733862664132,
                -0.0010485487159592817,
                5.553713330078852e-05,
                1.6538196392079977e-05
              ]
            ],
            "knots": [
              0.9965319692472823,
              1.0
            ],
            "max_abs_error": 2.428908157377544e-06
          },
          "entropy_form": {
            "RT": 2478.957029602388,
            "kind": "ideal_mixing"
          },
          "hermite": [
            [
              48.54146120154496,
              -48.35378165655514,
              -0.18428983580643887,
              -0.0033897091833807735
            ]
          ],
          "kind": "single_phase",
          "knots": [
            0.9965319692472823,
            1.0
          ],
          "max_abs_error": 0.0005336027780629138,
          "phase": "FCC_A1#2",
          "x_hi": 1.0,
          "x_lo": 0.9965319692472823
        }
      ],
      "phase_instances": {
        "FCC_A1#1": "FCC_A1",
        "FCC_A1#2": "FCC_A1"
      },
      "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#1",
          "phase_kind": "solution",
          "spacegroup_number": null,
          "spacegroup_symbol": "",
          "theoretical": false,
          "x": 0.0
        },
        {
          "collinear": false,
          "degenerate": [],
          "energy": -94.57728169478287,
          "energy_per_atom": -94.57728169478287,
          "enthalpy": 323.20136980509113,
          "entries_at_x": 1,
          "entropy": 1.4012364631892495,
          "formula": "",
          "nsites": null,
          "phase": "FCC_A1#1",
          "phase_kind": "solution",
          "spacegroup_number": null,
          "spacegroup_symbol": "",
          "theoretical": false,
          "x": 0.041658984689168004
        },
        {
          "collinear": false,
          "degenerate": [],
          "energy": -8.736130534134645,
          "energy_per_atom": -8.736130534134645,
          "enthalpy": 48.83259674166074,
          "entries_at_x": 1,
          "entropy": 0.19308645740665753,
          "formula": "",
          "nsites": null,
          "phase": "FCC_A1#2",
          "phase_kind": "solution",
          "spacegroup_number": null,
          "spacegroup_symbol": "",
          "theoretical": false,
          "x": 0.9965319692472823
        },
        {
          "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#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": "CuNi-92Mey-LB",
    "builder_version": 1,
    "engine": {
      "numpy": "2.5.1",
      "pycalphad": "0.11.2",
      "python": "3.13.15"
    },
    "fit_tol": 1.0,
    "observed_at": "2026-09-03T00:31:04Z",
    "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/CuNi-92Mey-LB.tdb",
    "source_sha256": "7e52adda858e302168ae26b5abfe17f4726ccbfaaff0880abcad5b38e3f559e1"
  },
  "reference": {
    "kind": "calphad_formation_T",
    "per": "mole_atoms",
    "temperature_K": 298.15,
    "units": "J/mol-atoms"
  },
  "schema_version": 1,
  "system_id": "CU-NI",
  "x_element": "NI"
}