{
  "counts": {
    "above_hull": 0,
    "entries": 5,
    "intervals": 4,
    "vertices": 5
  },
  "elements": [
    "FE",
    "ND"
  ],
  "flags": [
    "has_intermediate_phases",
    "solution_phases"
  ],
  "isotherms": [
    {
      "element_reference": {
        "FE": {
          "energy": -8133.4606437627535,
          "phase": "BCC_A2"
        },
        "ND": {
          "energy": -21194.349714265707,
          "phase": "DHCP"
        }
      },
      "intervals": [
        {
          "enthalpy": {
            "entropy_form": null,
            "hermite": [
              [
                0.0,
                -0.014955103661352538,
                0.09558234349380443,
                -0.046848509025743404
              ]
            ],
            "knots": [
              0.0,
              1.8918711812417235e-06
            ],
            "max_abs_error": 0.0061344632413216395
          },
          "entropy": {
            "entropy_form": {
              "R": 8.31446261815324,
              "kind": "ideal_mixing_entropy"
            },
            "hermite": [
              [
                0.0,
                -0.00048624246496744043,
                0.0008570746054724398,
                -0.0004200854803904484
              ]
            ],
            "knots": [
              0.0,
              1.8918711812417235e-06
            ],
            "max_abs_error": 5.5007069491808924e-05
          },
          "entropy_form": {
            "RT": 2478.957029602388,
            "kind": "ideal_mixing"
          },
          "hermite": [
            [
              0.0,
              0.130018087465627,
              -0.1599544509456351,
              0.07839997757444253
            ]
          ],
          "kind": "single_phase",
          "knots": [
            0.0,
            1.8918711812417235e-06
          ],
          "max_abs_error": 0.010265894524439056,
          "phase": "BCC_A2",
          "x_hi": 1.8918711812417235e-06,
          "x_lo": 0.0
        },
        {
          "enthalpy": {
            "intercept": 0.046498145376229885,
            "slope": -6723.192728784553
          },
          "entropy": {
            "intercept": 0.0001611052364996111,
            "slope": 6.691228542411171
          },
          "intercept": -0.001535380885249623,
          "kind": "two_phase",
          "left": {
            "phase": "BCC_A2",
            "x": 1.8918711812417235e-06
          },
          "mu_a_rel": -0.001535380885249623,
          "mu_b_rel": -8718.184054085437,
          "right": {
            "phase": "FE17ND2",
            "x": 0.10526315789473684
          },
          "slope": -8718.182518704552,
          "x_hi": 0.10526315789473684,
          "x_lo": 1.8918711812417235e-06
        },
        {
          "enthalpy": {
            "intercept": 1335.8412956411862,
            "slope": -19413.243304994747
          },
          "entropy": {
            "intercept": 4.564174358775661,
            "slope": -36.66689736621087
          },
          "intercept": -24.967289427789183,
          "kind": "two_phase",
          "left": {
            "phase": "FE17ND2",
            "x": 0.10526315789473684
          },
          "mu_a_rel": -24.967289427789183,
          "mu_b_rel": -8505.975144686756,
          "right": {
            "phase": "FE17ND5",
            "x": 0.22727272727272724
          },
          "slope": -8481.007855258966,
          "x_hi": 0.22727272727272724,
          "x_lo": 0.10526315789473684
        },
        {
          "enthalpy": {
            "intercept": -3981.0416482863307,
            "slope": 3981.0416482863307
          },
          "entropy": {
            "intercept": -4.877802996352339,
            "slope": 4.877802996352339
          },
          "intercept": -2526.724684923893,
          "kind": "two_phase",
          "left": {
            "phase": "FE17ND5",
            "x": 0.22727272727272724
          },
          "mu_a_rel": -2526.724684923893,
          "mu_b_rel": 0.0,
          "right": {
            "phase": "DHCP",
            "x": 1.0
          },
          "slope": 2526.724684923893,
          "x_hi": 1.0,
          "x_lo": 0.22727272727272724
        }
      ],
      "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": "BCC_A2",
          "phase_kind": "solution",
          "spacegroup_number": null,
          "spacegroup_symbol": "",
          "theoretical": false,
          "x": 0.0
        },
        {
          "collinear": false,
          "degenerate": [],
          "energy": -0.01802905914519215,
          "energy_per_atom": -0.01802905914519215,
          "enthalpy": 0.033778730806708485,
          "entries_at_x": 1,
          "entropy": 0.00017376417894610086,
          "formula": "",
          "nsites": null,
          "phase": "BCC_A2",
          "phase_kind": "solution",
          "spacegroup_number": null,
          "spacegroup_symbol": "",
          "theoretical": false,
          "x": 1.8918711812417235e-06
        },
        {
          "collinear": false,
          "degenerate": [],
          "energy": -917.7049584024171,
          "energy_per_atom": -917.7049584024171,
          "enthalpy": -707.6579996214188,
          "entries_at_x": 1,
          "entropy": 0.7045009518060965,
          "formula": "",
          "nsites": null,
          "phase": "FE17ND2",
          "phase_kind": "solution",
          "spacegroup_number": null,
          "spacegroup_symbol": "",
          "theoretical": false,
          "x": 0.10526315789473684
        },
        {
          "collinear": false,
          "degenerate": [],
          "energy": -1952.4690747139175,
          "energy_per_atom": -1952.4690747139175,
          "enthalpy": -3076.259455493983,
          "entries_at_x": 1,
          "entropy": -3.7692114062722624,
          "formula": "",
          "nsites": null,
          "phase": "FE17ND5",
          "phase_kind": "solution",
          "spacegroup_number": null,
          "spacegroup_symbol": "",
          "theoretical": false,
          "x": 0.22727272727272724
        },
        {
          "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": "DHCP",
          "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": "FeNd-95Hal-LB",
    "builder_version": 1,
    "engine": {
      "numpy": "2.5.1",
      "pycalphad": "0.11.2",
      "python": "3.13.15"
    },
    "fit_tol": 1.0,
    "observed_at": "2026-09-03T00:35:46Z",
    "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/FeNd-95Hal-LB.tdb",
    "source_sha256": "ab4a9e90b16a414a4eb6d9d39cae634150efd7762fdd236541a9e2b623a8f870"
  },
  "reference": {
    "kind": "calphad_formation_T",
    "per": "mole_atoms",
    "temperature_K": 298.15,
    "units": "J/mol-atoms"
  },
  "schema_version": 1,
  "system_id": "FE-ND",
  "x_element": "ND"
}