{
  "counts": {
    "above_hull": 0,
    "entries": 7,
    "intervals": 6,
    "vertices": 7
  },
  "elements": [
    "CO",
    "V"
  ],
  "flags": [
    "has_intermediate_phases",
    "redundant_phase_descriptions",
    "solution_phases"
  ],
  "isotherms": [
    {
      "element_reference": {
        "CO": {
          "energy": -8956.44939227662,
          "phase": "HCP_4SL"
        },
        "V": {
          "energy": -9209.853407504519,
          "phase": "BCC_A2"
        }
      },
      "intervals": [
        {
          "enthalpy": {
            "entropy_form": null,
            "hermite": [
              [
                0.0,
                -117.92790516323055,
                0.767662087768457,
                0.003498761918024229
              ]
            ],
            "knots": [
              0.0,
              0.0035131854584630434
            ],
            "max_abs_error": 0.00044672953239910385
          },
          "entropy": {
            "entropy_form": {
              "R": 8.31446261815324,
              "kind": "ideal_mixing_entropy"
            },
            "hermite": [
              [
                0.0,
                -0.04722166420517463,
                0.00020838797755737964,
                -1.4350284171710248e-05
              ]
            ],
            "knots": [
              0.0,
              0.0035131854584630434
            ],
            "max_abs_error": 2.2018118921163232e-06
          },
          "entropy_form": {
            "RT": 2478.957029602388,
            "kind": "ideal_mixing"
          },
          "hermite": [
            [
              0.0,
              -103.8487659806155,
              0.7055312126013149,
              0.007777298953911327
            ]
          ],
          "kind": "single_phase",
          "knots": [
            0.0,
            0.0035131854584630434
          ],
          "max_abs_error": 0.0011030151153477163,
          "phase": "A3_HCP",
          "x_hi": 0.0035131854584630434,
          "x_lo": 0.0
        },
        {
          "enthalpy": {
            "intercept": 25.266812362273512,
            "slope": -40539.72053559773
          },
          "entropy": {
            "intercept": 0.11642551779176183,
            "slope": 8.761174919572033
          },
          "intercept": -9.445455767346573,
          "kind": "two_phase",
          "left": {
            "phase": "A3_HCP",
            "x": 0.0035131854584630434
          },
          "mu_a_rel": -9.445455767346573,
          "mu_b_rel": -43161.31029363542,
          "right": {
            "phase": "HCP_4SL",
            "x": 0.24997718991314635
          },
          "slope": -43151.864837868074,
          "x_hi": 0.24997718991314635,
          "x_lo": 0.0035131854584630434
        },
        {
          "enthalpy": {
            "entropy_form": null,
            "hermite": [
              [
                -10108.738606990719,
                -1.613669094511473,
                -1.0989152267152227,
                1.6395284167933701
              ]
            ],
            "knots": [
              0.24997718991314635,
              0.25000566010565844
            ],
            "max_abs_error": 0.13191787382857
          },
          "entropy": {
            "entropy_form": {
              "R": 8.31446261815324,
              "kind": "ideal_mixing_entropy"
            },
            "hermite": [
              [
                -2.3687867669552505,
                -0.0015517774433941032,
                -0.002444062053688426,
                0.0032928658812924204
              ]
            ],
            "knots": [
              0.24997718991314635,
              0.25000566010565844
            ],
            "max_abs_error": 0.00029790483878722185
          },
          "entropy_form": {
            "RT": 2478.957029602388,
            "kind": "ideal_mixing"
          },
          "hermite": [
            [
              -9402.484832423004,
              -1.1510066505871706,
              -0.3702181232719061,
              0.6577604529655849
            ]
          ],
          "kind": "single_phase",
          "knots": [
            0.24997718991314635,
            0.25000566010565844
          ],
          "max_abs_error": 0.04309754617497674,
          "phase": "HCP_4SL",
          "x_hi": 0.25000566010565844,
          "x_lo": 0.24997718991314635
        },
        {
          "enthalpy": {
            "intercept": -9729.87705695664,
            "slope": -1519.704017012817
          },
          "entropy": {
            "intercept": 3.7021958376522486,
            "slope": -5.5843509224263395
          },
          "intercept": -10833.68674595266,
          "kind": "two_phase",
          "left": {
            "phase": "HCP_4SL",
            "x": 0.25000566010565844
          },
          "mu_a_rel": -10833.68674595266,
          "mu_b_rel": -10688.416535444067,
          "right": {
            "phase": "COV3_A15",
            "x": 0.75
          },
          "slope": 145.27021050859378,
          "x_hi": 0.75,
          "x_lo": 0.25000566010565844
        },
        {
          "enthalpy": {
            "intercept": -43479.16584281153,
            "slope": 43479.34769746037
          },
          "entropy": {
            "intercept": -1.9462406001985808,
            "slope": 1.9468976613747662
          },
          "intercept": -42898.89420786233,
          "kind": "two_phase",
          "left": {
            "phase": "COV3_A15",
            "x": 0.75
          },
          "mu_a_rel": -42898.89420786233,
          "mu_b_rel": -0.014048140845261514,
          "right": {
            "phase": "BCC_A2",
            "x": 0.9999943065244736
          },
          "slope": 42898.880159721484,
          "x_hi": 0.9999943065244736,
          "x_lo": 0.75
        },
        {
          "enthalpy": {
            "entropy_form": null,
            "hermite": [
              [
                -0.06569395317849636,
                0.06570474863979346,
                0.0010643730058942924,
                -0.001075168467191398
              ]
            ],
            "knots": [
              0.9999943065244736,
              1.0
            ],
            "max_abs_error": 0.00015419885032429484
          },
          "entropy": {
            "entropy_form": {
              "R": 8.31446261815324,
              "kind": "ideal_mixing_entropy"
            },
            "hermite": [
              [
                2.6973552492541965e-05,
                -2.7157977329276334e-05,
                -1.7006961798836988e-05,
                1.7191386635571356e-05
              ]
            ],
            "knots": [
              0.9999943065244736,
              1.0
            ],
            "max_abs_error": 2.4655853744578927e-06
          },
          "entropy_form": {
            "RT": 2478.957029602388,
            "kind": "ideal_mixing"
          },
          "hermite": [
            [
              -0.07373611785652884,
              0.0738018996117847,
              0.006134998487408783,
              -0.006200780242664641
            ]
          ],
          "kind": "single_phase",
          "knots": [
            0.9999943065244736,
            1.0
          ],
          "max_abs_error": 0.0008893131131775464,
          "phase": "BCC_A2",
          "x_hi": 1.0,
          "x_lo": 0.9999943065244736
        }
      ],
      "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": "A3_HCP",
          "phase_kind": "solution",
          "spacegroup_number": null,
          "spacegroup_symbol": "",
          "theoretical": false,
          "x": 0.0
        },
        {
          "collinear": false,
          "degenerate": [],
          "energy": -161.0459598213074,
          "energy_per_atom": -161.0459598213074,
          "enthalpy": -117.15674431354405,
          "entries_at_x": 1,
          "entropy": 0.14720515011825341,
          "formula": "",
          "nsites": null,
          "phase": "A3_HCP",
          "phase_kind": "solution",
          "spacegroup_number": null,
          "spacegroup_symbol": "",
          "theoretical": false,
          "x": 0.0035131854584630434
        },
        {
          "collinear": false,
          "degenerate": [],
          "energy": -10796.427367449516,
          "energy_per_atom": -10796.427367449516,
          "enthalpy": -10108.738606990719,
          "entries_at_x": 1,
          "entropy": 2.3065194045239146,
          "formula": "",
          "nsites": null,
          "phase": "HCP_4SL",
          "phase_kind": "solution",
          "spacegroup_number": null,
          "spacegroup_symbol": "",
          "theoretical": false,
          "x": 0.24997718991314635
        },
        {
          "collinear": false,
          "degenerate": [],
          "energy": -10797.36837108077,
          "energy_per_atom": -10797.36837108077,
          "enthalpy": -10109.81166289515,
          "entries_at_x": 1,
          "entropy": 2.306076499029409,
          "formula": "",
          "nsites": null,
          "phase": "HCP_4SL",
          "phase_kind": "solution",
          "spacegroup_number": null,
          "spacegroup_symbol": "",
          "theoretical": false,
          "x": 0.25000566010565844
        },
        {
          "collinear": false,
          "degenerate": [],
          "energy": -10724.734088071215,
          "energy_per_atom": -10724.734088071215,
          "enthalpy": -10869.655069716253,
          "entries_at_x": 1,
          "entropy": -0.48606735416750624,
          "formula": "",
          "nsites": null,
          "phase": "COV3_A15",
          "phase_kind": "solution",
          "spacegroup_number": null,
          "spacegroup_symbol": "",
          "theoretical": false,
          "x": 0.75
        },
        {
          "collinear": false,
          "degenerate": [],
          "energy": -0.25829186514056346,
          "energy_per_atom": -0.25829186514056346,
          "enthalpy": -0.06569395317849636,
          "entries_at_x": 1,
          "entropy": 0.0006459765619979407,
          "formula": "",
          "nsites": null,
          "phase": "BCC_A2",
          "phase_kind": "solution",
          "spacegroup_number": null,
          "spacegroup_symbol": "",
          "theoretical": false,
          "x": 0.9999943065244736
        },
        {
          "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": "CoV-03Bra-LB",
    "builder_version": 1,
    "engine": {
      "numpy": "2.5.1",
      "pycalphad": "0.11.2",
      "python": "3.13.15"
    },
    "fit_tol": 1.0,
    "observed_at": "2026-09-03T00:27:27Z",
    "phase_families": {
      "FCC_A1": "A1_FCC",
      "HCP_A3": "A3_HCP"
    },
    "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/CoV-03Bra-LB.tdb",
    "source_sha256": "9989e5b98aef44c67ea22b635cd1c710a06d815cb89127f570e3f6154dac5eb7"
  },
  "reference": {
    "kind": "calphad_formation_T",
    "per": "mole_atoms",
    "temperature_K": 298.15,
    "units": "J/mol-atoms"
  },
  "schema_version": 1,
  "system_id": "CO-V",
  "x_element": "V"
}
