{
  "counts": {
    "above_hull": 36,
    "entries": 108,
    "intervals": 9,
    "vertices": 10
  },
  "elements": [
    "ND",
    "ZN"
  ],
  "flags": [
    "has_intermediate_compounds",
    "mp_agreement_not_comparable",
    "theoretical_vertices"
  ],
  "isotherms": [
    {
      "intervals": [
        {
          "intercept": 0.0,
          "kind": "two_phase",
          "left": {
            "phase": "oqmd-8137",
            "x": 0.0
          },
          "mu_a_rel": 0.0,
          "mu_b_rel": -0.636416825,
          "right": {
            "phase": "oqmd-17780",
            "x": 0.5
          },
          "slope": -0.636416825,
          "x_hi": 0.5,
          "x_lo": 0.0
        },
        {
          "intercept": -0.17516508499999892,
          "kind": "two_phase",
          "left": {
            "phase": "oqmd-17780",
            "x": 0.5
          },
          "mu_a_rel": -0.17516508499999892,
          "mu_b_rel": -0.461251740000001,
          "right": {
            "phase": "oqmd-17781",
            "x": 0.6666666666666666
          },
          "slope": -0.28608665500000213,
          "x_hi": 0.6666666666666666,
          "x_lo": 0.5
        },
        {
          "intercept": -0.5547430250000027,
          "kind": "two_phase",
          "left": {
            "phase": "oqmd-17781",
            "x": 0.6666666666666666
          },
          "mu_a_rel": -0.5547430250000027,
          "mu_b_rel": -0.2714627699999991,
          "right": {
            "phase": "oqmd-30823",
            "x": 0.75
          },
          "slope": 0.28328025500000364,
          "x_hi": 0.75,
          "x_lo": 0.6666666666666666
        },
        {
          "intercept": -0.5679806149999962,
          "kind": "two_phase",
          "left": {
            "phase": "oqmd-30823",
            "x": 0.75
          },
          "mu_a_rel": -0.5679806149999962,
          "mu_b_rel": -0.2670502400000013,
          "right": {
            "phase": "oqmd-2028061",
            "x": 0.7857142857142857
          },
          "slope": 0.30093037499999487,
          "x_hi": 0.7857142857142857,
          "x_lo": 0.75
        },
        {
          "intercept": -0.7748796699999921,
          "kind": "two_phase",
          "left": {
            "phase": "oqmd-2028061",
            "x": 0.7857142857142857
          },
          "mu_a_rel": -0.7748796699999921,
          "mu_b_rel": -0.2106232250000024,
          "right": {
            "phase": "oqmd-17782",
            "x": 0.8333333333333334
          },
          "slope": 0.5642564449999897,
          "x_hi": 0.8333333333333334,
          "x_lo": 0.7857142857142857
        },
        {
          "intercept": -0.8098495057142989,
          "kind": "two_phase",
          "left": {
            "phase": "oqmd-17782",
            "x": 0.8333333333333334
          },
          "mu_a_rel": -0.8098495057142989,
          "mu_b_rel": -0.20362925785714092,
          "right": {
            "phase": "oqmd-27335",
            "x": 0.88
          },
          "slope": 0.606220247857158,
          "x_hi": 0.88,
          "x_lo": 0.8333333333333334
        },
        {
          "intercept": -1.3050100585714106,
          "kind": "two_phase",
          "left": {
            "phase": "oqmd-27335",
            "x": 0.88
          },
          "mu_a_rel": -1.3050100585714106,
          "mu_b_rel": -0.1361073642857169,
          "right": {
            "phase": "oqmd-17371",
            "x": 0.8947368421052632
          },
          "slope": 1.1689026942856937,
          "x_hi": 0.8947368421052632,
          "x_lo": 0.88
        },
        {
          "intercept": -2.047968728000029,
          "kind": "two_phase",
          "left": {
            "phase": "oqmd-17371",
            "x": 0.8947368421052632
          },
          "mu_a_rel": -2.047968728000029,
          "mu_b_rel": -0.04870046199999689,
          "right": {
            "phase": "oqmd-17783",
            "x": 0.9166666666666666
          },
          "slope": 1.9992682660000323,
          "x_hi": 0.9166666666666666,
          "x_lo": 0.8947368421052632
        },
        {
          "intercept": -2.5836738099999947,
          "kind": "two_phase",
          "left": {
            "phase": "oqmd-17783",
            "x": 0.9166666666666666
          },
          "mu_a_rel": -2.5836738099999947,
          "mu_b_rel": 0.0,
          "right": {
            "phase": "oqmd-122929",
            "x": 1.0
          },
          "slope": 2.5836738099999947,
          "x_hi": 1.0,
          "x_lo": 0.9166666666666666
        }
      ],
      "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": -0.3182084125,
          "energy_per_atom": -3.33267998,
          "entries_at_x": 23,
          "formula": "Nd1 Zn1",
          "nsites": 2,
          "phase": "oqmd-17780",
          "phase_kind": "structure",
          "spacegroup_number": 221,
          "spacegroup_symbol": "Pm-3m",
          "theoretical": false,
          "x": 0.5
        },
        {
          "collinear": false,
          "degenerate": [],
          "energy": -0.365889521666667,
          "energy_per_atom": -2.79754616666667,
          "entries_at_x": 6,
          "formula": "Nd1 Zn2",
          "nsites": 6,
          "phase": "oqmd-17781",
          "phase_kind": "structure",
          "spacegroup_number": 74,
          "spacegroup_symbol": "Imma",
          "theoretical": false,
          "x": 0.6666666666666666
        },
        {
          "collinear": false,
          "degenerate": [],
          "energy": -0.34228283375,
          "energy_per_atom": -2.4825320175,
          "entries_at_x": 7,
          "formula": "Nd1 Zn3",
          "nsites": 16,
          "phase": "oqmd-30823",
          "phase_kind": "structure",
          "spacegroup_number": 62,
          "spacegroup_symbol": "Pnma",
          "theoretical": false,
          "x": 0.75
        },
        {
          "collinear": false,
          "degenerate": [],
          "energy": -0.33153532035714306,
          "energy_per_atom": -2.3468955921428574,
          "entries_at_x": 3,
          "formula": "Nd3 Zn11",
          "nsites": 14,
          "phase": "oqmd-2028061",
          "phase_kind": "structure",
          "spacegroup_number": 71,
          "spacegroup_symbol": "Immm",
          "theoretical": true,
          "x": 0.7857142857142857
        },
        {
          "collinear": false,
          "degenerate": [],
          "energy": -0.304665965833334,
          "energy_per_atom": -2.15350768833333,
          "entries_at_x": 1,
          "formula": "Nd1 Zn5",
          "nsites": 6,
          "phase": "oqmd-17782",
          "phase_kind": "structure",
          "spacegroup_number": 191,
          "spacegroup_symbol": "P6/mmm",
          "theoretical": false,
          "x": 0.8333333333333334
        },
        {
          "collinear": false,
          "degenerate": [],
          "energy": -0.2763756876,
          "energy_per_atom": -1.9620292318,
          "entries_at_x": 1,
          "formula": "Nd3 Zn22",
          "nsites": 50,
          "phase": "oqmd-27335",
          "phase_kind": "structure",
          "spacegroup_number": 141,
          "spacegroup_symbol": "I41/amd",
          "theoretical": false,
          "x": 0.88
        },
        {
          "collinear": false,
          "degenerate": [],
          "energy": -0.259149753157895,
          "energy_per_atom": -1.89327018842105,
          "entries_at_x": 2,
          "formula": "Nd2 Zn17",
          "nsites": 19,
          "phase": "oqmd-17371",
          "phase_kind": "structure",
          "spacegroup_number": 166,
          "spacegroup_symbol": "R-3m",
          "theoretical": false,
          "x": 0.8947368421052632
        },
        {
          "collinear": false,
          "degenerate": [],
          "energy": -0.215306150833333,
          "energy_per_atom": -1.77274041208333,
          "entries_at_x": 1,
          "formula": "Nd1 Zn11",
          "nsites": 24,
          "phase": "oqmd-17783",
          "phase_kind": "structure",
          "spacegroup_number": 141,
          "spacegroup_symbol": "I41/amd",
          "theoretical": false,
          "x": 0.9166666666666666
        },
        {
          "collinear": false,
          "degenerate": [],
          "energy": 0.0,
          "energy_per_atom": -1.2660268,
          "entries_at_x": 31,
          "formula": "Zn1",
          "nsites": 2,
          "phase": "oqmd-122929",
          "phase_kind": "structure",
          "spacegroup_number": 194,
          "spacegroup_symbol": "P63/mmc",
          "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": 0.00016701000000007848,
    "only_mp_stable": [
      "oqmd-ref-Nd",
      "oqmd-ref-Zn"
    ],
    "only_ours_stable": [
      "oqmd-17780"
    ],
    "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-ZN",
  "x_element": "ZN"
}
