{
  "counts": {
    "above_hull": 0,
    "entries": 6,
    "intervals": 5,
    "vertices": 6
  },
  "elements": [
    "C",
    "V"
  ],
  "flags": [
    "has_intermediate_phases",
    "solution_phases"
  ],
  "isotherms": [
    {
      "element_reference": {
        "C": {
          "energy": -1712.072279533501,
          "phase": "GRAPHITE_A9"
        },
        "V": {
          "energy": -9209.853478905441,
          "phase": "BCC_A2"
        }
      },
      "intervals": [
        {
          "enthalpy": {
            "intercept": 0.0,
            "slope": -100279.85186155072
          },
          "entropy": {
            "intercept": 0.0,
            "slope": -8.812004410054014
          },
          "intercept": 0.0,
          "kind": "two_phase",
          "left": {
            "phase": "GRAPHITE_A9",
            "x": 0.0
          },
          "mu_a_rel": 0.0,
          "mu_b_rel": -97652.55274669312,
          "right": {
            "phase": "FCC_A1",
            "x": 0.5049462102728389
          },
          "slope": -97652.55274669312,
          "x_hi": 0.5049462102728389,
          "x_lo": 0.0
        },
        {
          "enthalpy": {
            "entropy_form": null,
            "hermite": [
              [
                -50635.931164211725,
                -1841.9508605878448,
                630.3514637246044,
                -43.07484932035004
              ],
              [
                -51890.605410395336,
                -710.4734766687695,
                501.16405261156837,
                -33.6913173911766
              ]
            ],
            "knots": [
              0.5049462102728389,
              0.5273530579341941,
              0.5497599057412813
            ],
            "max_abs_error": 0.16553943770122714
          },
          "entropy": {
            "entropy_form": {
              "R": 8.31446261815324,
              "kind": "ideal_mixing_entropy"
            },
            "hermite": [
              [
                -10.212327720182257,
                0.5811327551204453,
                -0.15978831870951826,
                0.04112164003600516
              ],
              [
                -9.749861643735326,
                0.384936476059167,
                -0.050371075382123875,
                0.008225108696251537
              ],
              [
                -9.407071134362031,
                0.3088727448541574,
                -0.026656147128259755,
                0.0034033479219698903
              ],
              [
                -9.121451188714161,
                0.2657712207162392,
                -0.016611120560415388,
                0.001813704699752422
              ]
            ],
            "knots": [
              0.5049462102728389,
              0.5161496309127482,
              0.5273530579341941,
              0.53855648495564,
              0.5497599057412813
            ],
            "max_abs_error": 0.0013915583491073136
          },
          "entropy_form": {
            "RT": 2478.957029602388,
            "kind": "ideal_mixing"
          },
          "hermite": [
            [
              -47591.12565443939,
              -1094.2398989366036,
              205.6663633909493,
              -17.916929103114853
            ],
            [
              -48497.616119088154,
              -736.6634243716253,
              155.83957923445269,
              -7.4471874599548755
            ],
            [
              -49085.8871516853,
              -447.32724607423256,
              133.57636159248264,
              -5.43456971536412
            ],
            [
              -49405.072605882415,
              -196.4799280912188,
              117.1241490824347,
              -4.444934955116583
            ]
          ],
          "kind": "single_phase",
          "knots": [
            0.5049462102728389,
            0.5161496309127482,
            0.5273530579341941,
            0.53855648495564,
            0.5497599057412813
          ],
          "max_abs_error": 0.42510645880247466,
          "phase": "FCC_A1",
          "x_hi": 0.5497599057412813,
          "x_lo": 0.5049462102728389
        },
        {
          "enthalpy": {
            "intercept": -52849.32437618895,
            "slope": 1301.8741761099657
          },
          "entropy": {
            "intercept": -0.6227172791505913,
            "slope": -4.59447117552782
          },
          "intercept": -52663.661219410234,
          "kind": "two_phase",
          "left": {
            "phase": "FCC_A1",
            "x": 0.5497599057412813
          },
          "mu_a_rel": -52663.661219410234,
          "mu_b_rel": -49991.9454623166,
          "right": {
            "phase": "V3C2",
            "x": 0.6000000000000001
          },
          "slope": 2671.7157570936347,
          "x_hi": 0.6000000000000001,
          "x_lo": 0.5497599057412813
        },
        {
          "enthalpy": {
            "intercept": -74589.4896927755,
            "slope": 37535.48303708754
          },
          "entropy": {
            "intercept": 0.9663520001158954,
            "slope": -7.242919974305297
          },
          "intercept": -74877.60754161006,
          "kind": "two_phase",
          "left": {
            "phase": "V3C2",
            "x": 0.6000000000000001
          },
          "mu_a_rel": -74877.60754161006,
          "mu_b_rel": -35182.64791418338,
          "right": {
            "phase": "HCP_A3",
            "x": 0.6666666666666666
          },
          "slope": 39694.95962742669,
          "x_hi": 0.6666666666666666,
          "x_lo": 0.6000000000000001
        },
        {
          "enthalpy": {
            "intercept": -148697.5030041514,
            "slope": 148697.5030041514
          },
          "entropy": {
            "intercept": -11.586783948262907,
            "slope": 11.586783948262907
          },
          "intercept": -145242.90336997682,
          "kind": "two_phase",
          "left": {
            "phase": "HCP_A3",
            "x": 0.6666666666666666
          },
          "mu_a_rel": -145242.90336997682,
          "mu_b_rel": 0.0,
          "right": {
            "phase": "BCC_A2",
            "x": 1.0
          },
          "slope": 145242.90336997682,
          "x_hi": 1.0,
          "x_lo": 0.6666666666666666
        }
      ],
      "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": "GRAPHITE_A9",
          "phase_kind": "solution",
          "spacegroup_number": null,
          "spacegroup_symbol": "",
          "theoretical": false,
          "x": 0.0
        },
        {
          "collinear": false,
          "degenerate": [],
          "energy": -49309.2864329112,
          "energy_per_atom": -49309.2864329112,
          "enthalpy": -50635.931164211725,
          "entries_at_x": 1,
          "entropy": -4.449588231764318,
          "formula": "",
          "nsites": null,
          "phase": "FCC_A1",
          "phase_kind": "solution",
          "spacegroup_number": null,
          "spacegroup_symbol": "",
          "theoretical": false,
          "x": 0.5049462102728389
        },
        {
          "collinear": false,
          "degenerate": [],
          "energy": -51194.85901662294,
          "energy_per_atom": -51194.85901662294,
          "enthalpy": -52133.60615184373,
          "entries_at_x": 1,
          "entropy": -3.1485733195398,
          "formula": "",
          "nsites": null,
          "phase": "FCC_A1",
          "phase_kind": "solution",
          "spacegroup_number": null,
          "spacegroup_symbol": "",
          "theoretical": false,
          "x": 0.5497599057412813
        },
        {
          "collinear": false,
          "degenerate": [],
          "energy": -51060.63176515405,
          "energy_per_atom": -51060.63176515405,
          "enthalpy": -52068.19987052297,
          "entries_at_x": 1,
          "entropy": -3.379399984467284,
          "formula": "",
          "nsites": null,
          "phase": "V3C2",
          "phase_kind": "solution",
          "spacegroup_number": null,
          "spacegroup_symbol": "",
          "theoretical": false,
          "x": 0.6000000000000001
        },
        {
          "collinear": false,
          "degenerate": [],
          "energy": -48414.30112332561,
          "energy_per_atom": -48414.30112332561,
          "enthalpy": -49565.83433471714,
          "entries_at_x": 1,
          "entropy": -3.8622613160876362,
          "formula": "",
          "nsites": null,
          "phase": "HCP_A3",
          "phase_kind": "solution",
          "spacegroup_number": null,
          "spacegroup_symbol": "",
          "theoretical": false,
          "x": 0.6666666666666666
        },
        {
          "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": "VC-91Hua-LB",
    "builder_version": 1,
    "engine": {
      "numpy": "2.5.1",
      "pycalphad": "0.11.2",
      "python": "3.13.15"
    },
    "fit_tol": 1.0,
    "observed_at": "2026-09-03T01:10:02Z",
    "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/VC-91Hua-LB.tdb",
    "source_sha256": "7ade7709e53a562d1b851904976b5ccf070113722b2f53c46fce88daec473829"
  },
  "reference": {
    "kind": "calphad_formation_T",
    "per": "mole_atoms",
    "temperature_K": 298.15,
    "units": "J/mol-atoms"
  },
  "schema_version": 1,
  "system_id": "C-V",
  "x_element": "V"
}
