{
  "counts": {
    "above_hull": 0,
    "entries": 6,
    "intervals": 5,
    "vertices": 6
  },
  "elements": [
    "CO",
    "NB"
  ],
  "flags": [
    "has_intermediate_phases",
    "solution_phases"
  ],
  "isotherms": [
    {
      "element_reference": {
        "CO": {
          "energy": -8956.449347184545,
          "phase": "HCP_A3"
        },
        "NB": {
          "energy": -10813.900412629177,
          "phase": "BCC_A2"
        }
      },
      "intervals": [
        {
          "enthalpy": {
            "intercept": 0.0,
            "slope": -50539.271270756566
          },
          "entropy": {
            "intercept": 0.0,
            "slope": 22.273608743993677
          },
          "intercept": 0.0,
          "kind": "two_phase",
          "left": {
            "phase": "HCP_A3",
            "x": 0.0
          },
          "mu_a_rel": 0.0,
          "mu_b_rel": -57180.14771777832,
          "right": {
            "phase": "CO7NB2",
            "x": 0.2222222222222222
          },
          "slope": -57180.14771777832,
          "x_hi": 0.2222222222222222,
          "x_lo": 0.0
        },
        {
          "enthalpy": {
            "intercept": -2817.5946560659086,
            "slope": -37860.09531845998
          },
          "entropy": {
            "intercept": 1.701684458704956,
            "slope": 14.616028679821376
          },
          "intercept": -3324.951877428799,
          "kind": "two_phase",
          "left": {
            "phase": "CO7NB2",
            "x": 0.2222222222222222
          },
          "mu_a_rel": -3324.951877428799,
          "mu_b_rel": -45542.81614677753,
          "right": {
            "phase": "C15_LAVES",
            "x": 0.3333327750488904
          },
          "slope": -42217.86426934873,
          "x_hi": 0.3333327750488904,
          "x_lo": 0.2222222222222222
        },
        {
          "enthalpy": {
            "intercept": -10386.641263535394,
            "slope": -15152.91746485911
          },
          "entropy": {
            "intercept": 10.194250833311576,
            "slope": -10.86171311547914
          },
          "intercept": -13426.05714948727,
          "kind": "two_phase",
          "left": {
            "phase": "C15_LAVES",
            "x": 0.3333327750488904
          },
          "mu_a_rel": -13426.05714948727,
          "mu_b_rel": -25340.55484896621,
          "right": {
            "phase": "MU_D85",
            "x": 0.5277677941852523
          },
          "slope": -11914.497699478943,
          "x_hi": 0.5277677941852523,
          "x_lo": 0.3333327750488904
        },
        {
          "enthalpy": {
            "entropy_form": null,
            "hermite": [
              [
                -18383.863089435272,
                -238.43278413993738,
                -0.054809192505416604,
                0.03682702842772301
              ]
            ],
            "knots": [
              0.5277677941852523,
              0.5384615402529729
            ],
            "max_abs_error": 0.0017480275382695254
          },
          "entropy": {
            "entropy_form": {
              "R": 8.31446261815324,
              "kind": "ideal_mixing_entropy"
            },
            "hermite": [
              [
                -1.2885295220588286,
                -0.04531499631064788,
                -0.000783710319545633,
                -2.7217713157029477e-05
              ],
              [
                -1.334655446402179,
                -0.046962295734065754,
                -0.0008785969193535956,
                -3.858835532450505e-05
              ],
              [
                -1.3825349274109229,
                -0.048833131262775505,
                -0.0010082745120316497,
                -5.512064693149327e-05
              ],
              [
                -1.4324314538326615,
                -0.051018522638834496,
                -0.0011768970678618165,
                -9.089938156139205e-05
              ],
              [
                -1.484717772920919,
                -0.053647330939769616,
                -0.0014494383652534082,
                -0.00014572874779711364
              ],
              [
                -1.5399602709737392,
                -0.05698796982414341,
                -0.0018888474460683063,
                -0.0002864121456813834
              ],
              [
                -1.5991235003896325,
                -0.06162551110053529,
                -0.0026742459913484673,
                -0.0008197277162484973
              ],
              [
                -1.664242985197765,
                -0.0694066847017924,
                0.00837498125507899,
                -0.019626924295134046
              ]
            ],
            "knots": [
              0.5277677941852523,
              0.529104521389095,
              0.5304412498115404,
              0.5317779782339858,
              0.5331147066564312,
              0.5344514350788767,
              0.5357881635013221,
              0.5371248919237674,
              0.5384615402529729
            ],
            "max_abs_error": 0.0014089531374035236
          },
          "entropy_form": {
            "RT": 2478.957029602388,
            "kind": "ideal_mixing"
          },
          "hermite": [
            [
              -17999.68801243343,
              -16.293631317867387,
              0.2290909046563403,
              0.010457309640178991
            ],
            [
              -18015.742095537007,
              -15.80333618198478,
              0.2590548899328411,
              0.012961752012969896
            ],
            [
              -18031.273415077045,
              -15.245545556217067,
              0.2978401256708185,
              0.01776779077651547
            ],
            [
              -18046.203352716813,
              -14.597977753600151,
              0.35692312026596795,
              0.02363330514115347
            ],
            [
              -18060.42077404501,
              -13.814207506717615,
              0.43670421949009075,
              0.04146597634444582
            ],
            [
              -18073.756811355906,
              -12.818216156375613,
              0.5677718651068471,
              0.08337134059452644
            ],
            [
              -18085.923884306576,
              -11.434184673228668,
              0.7994960751901381,
              0.24337658043729604
            ],
            [
              -18096.315196324173,
              -9.111213662863898,
              -2.4987763729257666,
              5.853746518612587
            ]
          ],
          "kind": "single_phase",
          "knots": [
            0.5277677941852523,
            0.529104521389095,
            0.5304412498115404,
            0.5317779782339858,
            0.5331147066564312,
            0.5344514350788767,
            0.5357881635013221,
            0.5371248919237674,
            0.5384615402529729
          ],
          "max_abs_error": 0.42029282906878507,
          "phase": "MU_D85",
          "x_hi": 0.5384615402529729,
          "x_lo": 0.5277677941852523
        },
        {
          "enthalpy": {
            "intercept": -40348.34684404488,
            "slope": 40348.34684404488
          },
          "entropy": {
            "intercept": 8.65284637340179,
            "slope": -8.65284637340179
          },
          "intercept": -42928.192990274634,
          "kind": "two_phase",
          "left": {
            "phase": "MU_D85",
            "x": 0.5384615402529729
          },
          "mu_a_rel": -42928.192990274634,
          "mu_b_rel": 0.0,
          "right": {
            "phase": "BCC_A2",
            "x": 1.0
          },
          "slope": 42928.192990274634,
          "x_hi": 1.0,
          "x_lo": 0.5384615402529729
        }
      ],
      "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",
          "phase_kind": "solution",
          "spacegroup_number": null,
          "spacegroup_symbol": "",
          "theoretical": false,
          "x": 0.0
        },
        {
          "collinear": false,
          "degenerate": [],
          "energy": -12706.699492839627,
          "energy_per_atom": -12706.699492839627,
          "enthalpy": -11230.949171279237,
          "entries_at_x": 1,
          "entropy": 4.949690831998595,
          "formula": "",
          "nsites": null,
          "phase": "CO7NB2",
          "phase_kind": "solution",
          "spacegroup_number": null,
          "spacegroup_symbol": "",
          "theoretical": false,
          "x": 0.2222222222222222
        },
        {
          "collinear": false,
          "degenerate": [],
          "energy": -17397.549730968207,
          "energy_per_atom": -17397.549730968207,
          "enthalpy": -15437.605292183678,
          "entries_at_x": 1,
          "entropy": 6.5736858587439855,
          "formula": "",
          "nsites": null,
          "phase": "C15_LAVES",
          "phase_kind": "solution",
          "spacegroup_number": null,
          "spacegroup_symbol": "",
          "theoretical": false,
          "x": 0.3333327750488904
        },
        {
          "collinear": false,
          "degenerate": [],
          "energy": -19714.145319166535,
          "energy_per_atom": -19714.145319166535,
          "enthalpy": -18383.863089435272,
          "entries_at_x": 1,
          "entropy": 4.461788461282126,
          "formula": "",
          "nsites": null,
          "phase": "MU_D85",
          "phase_kind": "solution",
          "spacegroup_number": null,
          "spacegroup_symbol": "",
          "theoretical": false,
          "x": 0.5277677941852523
        },
        {
          "collinear": false,
          "degenerate": [],
          "energy": -19813.01207245448,
          "energy_per_atom": -19813.01207245448,
          "enthalpy": -18622.313855739296,
          "entries_at_x": 1,
          "entropy": 3.9936213876075115,
          "formula": "",
          "nsites": null,
          "phase": "MU_D85",
          "phase_kind": "solution",
          "spacegroup_number": null,
          "spacegroup_symbol": "",
          "theoretical": false,
          "x": 0.5384615402529729
        },
        {
          "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": "BCC_A2",
          "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": "CoNb-20Zho",
    "builder_version": 1,
    "engine": {
      "numpy": "2.5.1",
      "pycalphad": "0.11.2",
      "python": "3.13.15"
    },
    "fit_tol": 1.0,
    "observed_at": "2026-09-03T00:25:21Z",
    "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/CoNb-20Zho.tdb",
    "source_sha256": "9a76c67c6bba1992dfb73615a3daf596ca477bf15fa7620db3091a6f65501111"
  },
  "reference": {
    "kind": "calphad_formation_T",
    "per": "mole_atoms",
    "temperature_K": 298.15,
    "units": "J/mol-atoms"
  },
  "schema_version": 1,
  "system_id": "CO-NB",
  "x_element": "NB"
}