{
  "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": -9883.671553285876,
          "phase": "FCC_A1"
        },
        "NI": {
          "energy": -8883.518778597458,
          "phase": "FCC_A1"
        }
      },
      "intervals": [
        {
          "enthalpy": {
            "entropy_form": null,
            "hermite": [
              [
                0.0,
                186.57372237644125,
                -1.7679871138666954,
                -0.007194710908436264
              ]
            ],
            "knots": [
              0.0,
              0.01851109580216393
            ],
            "max_abs_error": 0.00012112132511532536
          },
          "entropy": {
            "entropy_form": {
              "R": 8.31446261815324,
              "kind": "ideal_mixing_entropy"
            },
            "hermite": [
              [
                0.0,
                -0.0053570957825620795,
                0.0028411718451075495,
                -5.699938852216462e-05
              ]
            ],
            "knots": [
              0.0,
              0.01851109580216393
            ],
            "max_abs_error": 2.0935510788564794e-06
          },
          "entropy_form": {
            "RT": 2478.957029602388,
            "kind": "ideal_mixing"
          },
          "hermite": [
            [
              0.0,
              188.17094048393156,
              -2.6150824996084054,
              0.009799656981272165
            ]
          ],
          "kind": "single_phase",
          "knots": [
            0.0,
            0.01851109580216393
          ],
          "max_abs_error": 0.0005041534064105235,
          "phase": "FCC_A1#1",
          "x_hi": 0.01851109580216393,
          "x_lo": 0.0
        },
        {
          "enthalpy": {
            "intercept": 187.94226634942595,
            "slope": -169.82926518009575
          },
          "entropy": {
            "intercept": 0.7770083434396383,
            "slope": -0.7076484350341974
          },
          "intercept": -43.722771247103836,
          "kind": "two_phase",
          "left": {
            "phase": "FCC_A1#1",
            "x": 0.01851109580216393
          },
          "mu_a_rel": -43.722771247103836,
          "mu_b_rel": -2.5666555217508034,
          "right": {
            "phase": "FCC_A1#2",
            "x": 0.9989553210394863
          },
          "slope": 41.15611572535303,
          "x_hi": 0.9989553210394863,
          "x_lo": 0.01851109580216393
        },
        {
          "enthalpy": {
            "entropy_form": null,
            "hermite": [
              [
                18.29041822954334,
                -18.268033449242186,
                -0.02403205797563146,
                0.001647277674475589
              ]
            ],
            "knots": [
              0.9989553210394863,
              1.0
            ],
            "max_abs_error": 0.00023637571250123557
          },
          "entropy": {
            "entropy_form": {
              "R": 8.31446261815324,
              "kind": "ideal_mixing_entropy"
            },
            "hermite": [
              [
                0.0017970509525542383,
                -0.0018038515633001723,
                -1.049915762320634e-05,
                1.7299768369140366e-05
              ]
            ],
            "knots": [
              0.9989553210394863,
              1.0
            ],
            "max_abs_error": 2.4871140785185687e-06
          },
          "entropy_form": {
            "RT": 2478.957029602388,
            "kind": "ideal_mixing"
          },
          "hermite": [
            [
              17.754627488040512,
              -17.730215105738516,
              -0.02090173389365546,
              -0.0035106484083406997
            ]
          ],
          "kind": "single_phase",
          "knots": [
            0.9989553210394863,
            1.0
          ],
          "max_abs_error": 0.0005051573490781891,
          "phase": "FCC_A1#2",
          "x_hi": 1.0,
          "x_lo": 0.9989553210394863
        }
      ],
      "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": -42.96092644606688,
          "energy_per_atom": -42.96092644606688,
          "enthalpy": 184.7985405516661,
          "entries_at_x": 1,
          "entropy": 0.7639089954644689,
          "formula": "",
          "nsites": null,
          "phase": "FCC_A1#1",
          "phase_kind": "solution",
          "spacegroup_number": null,
          "spacegroup_symbol": "",
          "theoretical": false,
          "x": 0.01851109580216393
        },
        {
          "collinear": false,
          "degenerate": [],
          "energy": -2.6096504499455477,
          "energy_per_atom": -2.6096504499455477,
          "enthalpy": 18.29041822954334,
          "entries_at_x": 1,
          "entropy": 0.07009917383696163,
          "formula": "",
          "nsites": null,
          "phase": "FCC_A1#2",
          "phase_kind": "solution",
          "spacegroup_number": null,
          "spacegroup_symbol": "",
          "theoretical": false,
          "x": 0.9989553210394863
        },
        {
          "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-89Sri",
    "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-89Sri.tdb",
    "source_sha256": "39b018ea8c7d3c13c313c0275c736b6516c8bfc5c0d2efaf0cf5b4a3963fc3f7"
  },
  "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"
}
