{
  "counts": {
    "above_hull": 22,
    "entries": 82,
    "intervals": 7,
    "vertices": 8
  },
  "elements": [
    "NI",
    "YB"
  ],
  "flags": [
    "has_intermediate_compounds",
    "mp_agreement_not_comparable",
    "theoretical_vertices"
  ],
  "isotherms": [
    {
      "intervals": [
        {
          "intercept": 0.0,
          "kind": "two_phase",
          "left": {
            "phase": "oqmd-ref-Ni",
            "x": 0.0
          },
          "mu_a_rel": 0.0,
          "mu_b_rel": -1.3207870600000022,
          "right": {
            "phase": "oqmd-17858",
            "x": 0.16666666666666666
          },
          "slope": -1.3207870600000022,
          "x_hi": 0.16666666666666666,
          "x_lo": 0.0
        },
        {
          "intercept": -0.010970838333331734,
          "kind": "two_phase",
          "left": {
            "phase": "oqmd-17858",
            "x": 0.16666666666666666
          },
          "mu_a_rel": -0.010970838333331734,
          "mu_b_rel": -1.2659328683333435,
          "right": {
            "phase": "oqmd-1484063",
            "x": 0.2222222222222222
          },
          "slope": -1.2549620300000117,
          "x_hi": 0.2222222222222222,
          "x_lo": 0.16666666666666666
        },
        {
          "intercept": -0.027098871666672852,
          "kind": "two_phase",
          "left": {
            "phase": "oqmd-1484063",
            "x": 0.2222222222222222
          },
          "mu_a_rel": -0.027098871666672852,
          "mu_b_rel": -1.2094847516666496,
          "right": {
            "phase": "oqmd-30878",
            "x": 0.25
          },
          "slope": -1.1823858799999767,
          "x_hi": 0.25,
          "x_lo": 0.2222222222222222
        },
        {
          "intercept": -0.10113998666666696,
          "kind": "two_phase",
          "left": {
            "phase": "oqmd-30878",
            "x": 0.25
          },
          "mu_a_rel": -0.10113998666666696,
          "mu_b_rel": -0.9873614066666672,
          "right": {
            "phase": "oqmd-17857",
            "x": 0.3333333333333333
          },
          "slope": -0.8862214200000003,
          "x_hi": 0.3333333333333333,
          "x_lo": 0.25
        },
        {
          "intercept": -0.5445759775000001,
          "kind": "two_phase",
          "left": {
            "phase": "oqmd-17857",
            "x": 0.3333333333333333
          },
          "mu_a_rel": -0.5445759775000001,
          "mu_b_rel": -0.10048942500000096,
          "right": {
            "phase": "oqmd-1367443",
            "x": 0.6666666666666666
          },
          "slope": 0.4440865524999991,
          "x_hi": 0.6666666666666666,
          "x_lo": 0.3333333333333333
        },
        {
          "intercept": -0.6871935875000068,
          "kind": "two_phase",
          "left": {
            "phase": "oqmd-1367443",
            "x": 0.6666666666666666
          },
          "mu_a_rel": -0.6871935875000068,
          "mu_b_rel": -0.029180619999997548,
          "right": {
            "phase": "oqmd-2029241",
            "x": 0.75
          },
          "slope": 0.6580129675000093,
          "x_hi": 0.75,
          "x_lo": 0.6666666666666666
        },
        {
          "intercept": -0.7747354474999995,
          "kind": "two_phase",
          "left": {
            "phase": "oqmd-2029241",
            "x": 0.75
          },
          "mu_a_rel": -0.7747354474999995,
          "mu_b_rel": 0.0,
          "right": {
            "phase": "oqmd-8144",
            "x": 1.0
          },
          "slope": 0.7747354474999995,
          "x_hi": 1.0,
          "x_lo": 0.75
        }
      ],
      "temperature_K": 0.0,
      "vertices": [
        {
          "collinear": false,
          "degenerate": [],
          "energy": 0.0,
          "energy_per_atom": -5.56662,
          "entries_at_x": 29,
          "formula": "Ni",
          "nsites": null,
          "phase": "oqmd-ref-Ni",
          "phase_kind": "structure",
          "spacegroup_number": null,
          "spacegroup_symbol": "",
          "theoretical": false,
          "x": 0.0
        },
        {
          "collinear": false,
          "degenerate": [],
          "energy": -0.220131176666667,
          "energy_per_atom": -5.11111001833333,
          "entries_at_x": 1,
          "formula": "Ni5 Yb1",
          "nsites": 6,
          "phase": "oqmd-17858",
          "phase_kind": "structure",
          "spacegroup_number": 191,
          "spacegroup_symbol": "P6/mmm",
          "theoretical": false,
          "x": 0.16666666666666666
        },
        {
          "collinear": false,
          "degenerate": [],
          "energy": -0.28985128944444544,
          "energy_per_atom": -4.955616571666667,
          "entries_at_x": 1,
          "formula": "Ni7 Yb2",
          "nsites": 18,
          "phase": "oqmd-1484063",
          "phase_kind": "structure",
          "spacegroup_number": 166,
          "spacegroup_symbol": "R-3m",
          "theoretical": true,
          "x": 0.2222222222222222
        },
        {
          "collinear": false,
          "degenerate": [],
          "energy": -0.322695341666667,
          "energy_per_atom": -4.87585384416667,
          "entries_at_x": 6,
          "formula": "Ni3 Yb1",
          "nsites": 12,
          "phase": "oqmd-30878",
          "phase_kind": "structure",
          "spacegroup_number": 166,
          "spacegroup_symbol": "R-3m",
          "theoretical": false,
          "x": 0.25
        },
        {
          "collinear": false,
          "degenerate": [],
          "energy": -0.396547126666667,
          "energy_per_atom": -4.61188529,
          "entries_at_x": 2,
          "formula": "Ni2 Yb1",
          "nsites": 6,
          "phase": "oqmd-17857",
          "phase_kind": "structure",
          "spacegroup_number": 227,
          "spacegroup_symbol": "Fd-3m",
          "theoretical": false,
          "x": 0.3333333333333333
        },
        {
          "collinear": false,
          "degenerate": [],
          "energy": -0.248518275833334,
          "energy_per_atom": -3.1125750825,
          "entries_at_x": 2,
          "formula": "Ni1 Yb2",
          "nsites": 12,
          "phase": "oqmd-1367443",
          "phase_kind": "structure",
          "spacegroup_number": 62,
          "spacegroup_symbol": "Pnma",
          "theoretical": true,
          "x": 0.6666666666666666
        },
        {
          "collinear": false,
          "degenerate": [],
          "energy": -0.19368386187499986,
          "energy_per_atom": -2.719920329375,
          "entries_at_x": 6,
          "formula": "Ni1 Yb3",
          "nsites": 16,
          "phase": "oqmd-2029241",
          "phase_kind": "structure",
          "spacegroup_number": 62,
          "spacegroup_symbol": "Pnma",
          "theoretical": true,
          "x": 0.75
        },
        {
          "collinear": false,
          "degenerate": [],
          "energy": 0.0,
          "energy_per_atom": -1.51277545,
          "entries_at_x": 20,
          "formula": "Yb1",
          "nsites": 1,
          "phase": "oqmd-8144",
          "phase_kind": "structure",
          "spacegroup_number": 225,
          "spacegroup_symbol": "Fm-3m",
          "theoretical": false,
          "x": 1.0
        }
      ]
    }
  ],
  "mp_agreement": {
    "comparable": false,
    "comparable_note": "is_stable is derived by the extraction, not an upstream flag, so comparing it against a hull recomputed from the same energies tests the derivation rather than the data",
    "max_abs_delta_energy_above_hull": 0.0011435100000003475,
    "only_mp_stable": [
      "oqmd-ref-Yb"
    ],
    "only_ours_stable": [
      "oqmd-1484063"
    ],
    "stable_sets_match": false
  },
  "provenance": {
    "above_hull_window_eV": 0.05,
    "builder_version": 1,
    "collinear_tol": 1e-12,
    "correction_model": "OQMD fit-partial ('standard' fit, applied upstream by OQMD; none added)",
    "degenerate_tol": 1e-06,
    "entry_pool": "all_nondeprecated",
    "is_stable_source": "derived",
    "observed_at": "2026-09-05T17:02:03Z",
    "snapshot_scope_elements": [],
    "snapshot_scope_kind": "full",
    "snapshot_sha256": "2a9393262c52ec35600424236c352a4cdb3291c8b25c1c6588f5e62abe8e0d8d",
    "source_release": "qmdb_v1_8_022026",
    "stability_tol": 0.0001,
    "thermo_type": "standard",
    "upstream_energy_corrections": "OQMD 'standard' fit (fit-partial of Kirklin et al. 2015): elemental reference energies of a subset of elements fitted to experimental formation enthalpies, applied by OQMD"
  },
  "reference": {
    "kind": "dft_fitted_elemental_reference_0K",
    "per": "atom",
    "temperature_K": 0.0,
    "units": "eV/atom"
  },
  "schema_version": 1,
  "system_id": "NI-YB",
  "x_element": "YB"
}