{
  "counts": {
    "above_hull": 0,
    "entries": 4,
    "intervals": 3,
    "vertices": 4
  },
  "elements": [
    "NB",
    "SI"
  ],
  "flags": [
    "has_intermediate_phases"
  ],
  "isotherms": [
    {
      "element_reference": {
        "NB": {
          "energy": -10813.900491746454,
          "phase": "BCC_A2"
        },
        "SI": {
          "energy": -5608.211823407297,
          "phase": "DIAMOND_A4"
        }
      },
      "intervals": [
        {
          "enthalpy": {
            "intercept": 0.0,
            "slope": -172778.66636969236
          },
          "entropy": {
            "intercept": 0.0,
            "slope": 5.54666633073568
          },
          "intercept": 0.0,
          "kind": "two_phase",
          "left": {
            "phase": "BCC_A2",
            "x": 0.0
          },
          "mu_a_rel": 0.0,
          "mu_b_rel": -174432.40493620123,
          "right": {
            "phase": "NB5SI3_D8L",
            "x": 0.375
          },
          "slope": -174432.40493620123,
          "x_hi": 0.375,
          "x_lo": 0.0
        },
        {
          "enthalpy": {
            "intercept": -76781.28563609571,
            "slope": 31971.428659896195
          },
          "entropy": {
            "intercept": 0.8971426714847286,
            "slope": 3.1542858734430705
          },
          "intercept": -77048.7687235989,
          "kind": "two_phase",
          "left": {
            "phase": "NB5SI3_D8L",
            "x": 0.375
          },
          "mu_a_rel": -77048.7687235989,
          "mu_b_rel": -46017.79039686972,
          "right": {
            "phase": "NBSI2_C40",
            "x": 0.6666666666666666
          },
          "slope": 31030.97832672918,
          "x_hi": 0.6666666666666666,
          "x_lo": 0.375
        },
        {
          "enthalpy": {
            "intercept": -166400.9995884947,
            "slope": 166400.9995884947
          },
          "entropy": {
            "intercept": 8.999999761340325,
            "slope": -8.999999761340325
          },
          "intercept": -169084.34951733833,
          "kind": "two_phase",
          "left": {
            "phase": "NBSI2_C40",
            "x": 0.6666666666666666
          },
          "mu_a_rel": -169084.34951733833,
          "mu_b_rel": 0.0,
          "right": {
            "phase": "DIAMOND_A4",
            "x": 1.0
          },
          "slope": 169084.34951733833,
          "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": "BCC_A2",
          "phase_kind": "solution",
          "spacegroup_number": null,
          "spacegroup_symbol": "",
          "theoretical": false,
          "x": 0.0
        },
        {
          "collinear": false,
          "degenerate": [],
          "energy": -65412.15185107546,
          "energy_per_atom": -65412.15185107546,
          "enthalpy": -64791.99988863464,
          "entries_at_x": 1,
          "entropy": 2.07999987402588,
          "formula": "",
          "nsites": null,
          "phase": "NB5SI3_D8L",
          "phase_kind": "solution",
          "spacegroup_number": null,
          "spacegroup_symbol": "",
          "theoretical": false,
          "x": 0.375
        },
        {
          "collinear": false,
          "degenerate": [],
          "energy": -56361.449839112785,
          "energy_per_atom": -56361.449839112785,
          "enthalpy": -55466.99986283158,
          "entries_at_x": 1,
          "entropy": 2.9999999204467755,
          "formula": "",
          "nsites": null,
          "phase": "NBSI2_C40",
          "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": "DIAMOND_A4",
          "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": "NbSi-03Yan",
    "builder_version": 1,
    "engine": {
      "numpy": "2.5.1",
      "pycalphad": "0.11.2",
      "python": "3.13.15"
    },
    "fit_tol": 1.0,
    "observed_at": "2026-09-03T00:51:16Z",
    "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/NbSi-03Yan.tdb",
    "source_sha256": "d0927671fb32f5392dff8f8465bd905eb02c7135fb7e1b198338a8ce415ceb13"
  },
  "reference": {
    "kind": "calphad_formation_T",
    "per": "mole_atoms",
    "temperature_K": 298.15,
    "units": "J/mol-atoms"
  },
  "schema_version": 1,
  "system_id": "NB-SI",
  "x_element": "SI"
}