{
  "counts": {
    "above_hull": 18,
    "entries": 74,
    "intervals": 4,
    "vertices": 5
  },
  "elements": [
    "ND",
    "SB"
  ],
  "flags": [
    "has_intermediate_compounds",
    "mp_agreement_not_comparable"
  ],
  "isotherms": [
    {
      "intervals": [
        {
          "intercept": 0.0,
          "kind": "two_phase",
          "left": {
            "phase": "oqmd-8137",
            "x": 0.0
          },
          "mu_a_rel": 0.0,
          "mu_b_rel": -2.604477671666667,
          "right": {
            "phase": "oqmd-30814",
            "x": 0.375
          },
          "slope": -2.604477671666667,
          "x_hi": 0.375,
          "x_lo": 0.0
        },
        {
          "intercept": -0.3246474024999999,
          "kind": "two_phase",
          "left": {
            "phase": "oqmd-30814",
            "x": 0.375
          },
          "mu_a_rel": -0.3246474024999999,
          "mu_b_rel": -2.0633986675000004,
          "right": {
            "phase": "oqmd-646231",
            "x": 0.5
          },
          "slope": -1.7387512650000003,
          "x_hi": 0.5,
          "x_lo": 0.375
        },
        {
          "intercept": -2.3428604475000014,
          "kind": "two_phase",
          "left": {
            "phase": "oqmd-646231",
            "x": 0.5
          },
          "mu_a_rel": -2.3428604475000014,
          "mu_b_rel": -0.04518562249999869,
          "right": {
            "phase": "oqmd-27439",
            "x": 0.6666666666666666
          },
          "slope": 2.2976748250000028,
          "x_hi": 0.6666666666666666,
          "x_lo": 0.5
        },
        {
          "intercept": -2.433192764166665,
          "kind": "two_phase",
          "left": {
            "phase": "oqmd-27439",
            "x": 0.6666666666666666
          },
          "mu_a_rel": -2.433192764166665,
          "mu_b_rel": -1.9464166666871563e-05,
          "right": {
            "phase": "oqmd-1787572",
            "x": 1.0
          },
          "slope": 2.433173299999998,
          "x_hi": 1.0,
          "x_lo": 0.6666666666666666
        }
      ],
      "temperature_K": 0.0,
      "vertices": [
        {
          "collinear": false,
          "degenerate": [],
          "energy": 0.0,
          "energy_per_atom": -4.762916335,
          "entries_at_x": 19,
          "formula": "Nd1",
          "nsites": 4,
          "phase": "oqmd-8137",
          "phase_kind": "structure",
          "spacegroup_number": 194,
          "spacegroup_symbol": "P63/mmc",
          "theoretical": false,
          "x": 0.0
        },
        {
          "collinear": false,
          "degenerate": [],
          "energy": -0.976679126875,
          "energy_per_atom": -5.497587970625,
          "entries_at_x": 1,
          "formula": "Nd5 Sb3",
          "nsites": 16,
          "phase": "oqmd-30814",
          "phase_kind": "structure",
          "spacegroup_number": 193,
          "spacegroup_symbol": "P63/mcm",
          "theoretical": false,
          "x": 0.375
        },
        {
          "collinear": false,
          "degenerate": [],
          "energy": -1.194023035,
          "energy_per_atom": -5.634262715,
          "entries_at_x": 8,
          "formula": "Nd1 Sb1",
          "nsites": 2,
          "phase": "oqmd-646231",
          "phase_kind": "structure",
          "spacegroup_number": 225,
          "spacegroup_symbol": "Fm-3m",
          "theoretical": false,
          "x": 0.5
        },
        {
          "collinear": false,
          "degenerate": [],
          "energy": -0.811077230833333,
          "energy_per_atom": -5.14375802583333,
          "entries_at_x": 5,
          "formula": "Nd1 Sb2",
          "nsites": 12,
          "phase": "oqmd-27439",
          "phase_kind": "structure",
          "spacegroup_number": 64,
          "spacegroup_symbol": "Cmca",
          "theoretical": false,
          "x": 0.6666666666666666
        },
        {
          "collinear": false,
          "degenerate": [],
          "energy": -1.9464166666871563e-05,
          "energy_per_atom": -4.117582489166667,
          "entries_at_x": 25,
          "formula": "Sb1",
          "nsites": 12,
          "phase": "oqmd-1787572",
          "phase_kind": "structure",
          "spacegroup_number": 12,
          "spacegroup_symbol": "C2/m",
          "theoretical": true,
          "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": 0.00021410999999993408,
    "only_mp_stable": [
      "oqmd-9672",
      "oqmd-ref-Nd",
      "oqmd-ref-Sb"
    ],
    "only_ours_stable": [
      "oqmd-30814"
    ],
    "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": "ND-SB",
  "x_element": "SB"
}
