{
  "counts": {
    "above_hull": 11,
    "entries": 64,
    "intervals": 3,
    "vertices": 4
  },
  "elements": [
    "AL",
    "NP"
  ],
  "flags": [
    "has_intermediate_compounds",
    "mp_agreement_not_comparable",
    "theoretical_vertices"
  ],
  "isotherms": [
    {
      "intervals": [
        {
          "intercept": 0.0,
          "kind": "two_phase",
          "left": {
            "phase": "oqmd-ref-Al",
            "x": 0.0
          },
          "mu_a_rel": 0.0,
          "mu_b_rel": -0.4775833287500005,
          "right": {
            "phase": "oqmd-20884",
            "x": 0.2
          },
          "slope": -0.4775833287500005,
          "x_hi": 0.2,
          "x_lo": 0.0
        },
        {
          "intercept": -0.007159782500000406,
          "kind": "two_phase",
          "left": {
            "phase": "oqmd-20884",
            "x": 0.2
          },
          "mu_a_rel": -0.007159782500000406,
          "mu_b_rel": -0.4489441987499989,
          "right": {
            "phase": "oqmd-1879986",
            "x": 0.3333333333333333
          },
          "slope": -0.4417844162499985,
          "x_hi": 0.3333333333333333,
          "x_lo": 0.2
        },
        {
          "intercept": -0.23163188187499983,
          "kind": "two_phase",
          "left": {
            "phase": "oqmd-1879986",
            "x": 0.3333333333333333
          },
          "mu_a_rel": -0.23163188187499983,
          "mu_b_rel": -2.7755575615628914e-17,
          "right": {
            "phase": "oqmd-17870",
            "x": 1.0
          },
          "slope": 0.2316318818749998,
          "x_hi": 1.0,
          "x_lo": 0.3333333333333333
        }
      ],
      "temperature_K": 0.0,
      "vertices": [
        {
          "collinear": false,
          "degenerate": [],
          "energy": 0.0,
          "energy_per_atom": -3.745739,
          "entries_at_x": 23,
          "formula": "Al",
          "nsites": null,
          "phase": "oqmd-ref-Al",
          "phase_kind": "structure",
          "spacegroup_number": null,
          "spacegroup_symbol": "",
          "theoretical": false,
          "x": 0.0
        },
        {
          "collinear": false,
          "degenerate": [],
          "energy": -0.0955166657500001,
          "energy_per_atom": -5.680162978,
          "entries_at_x": 1,
          "formula": "Al4 Np1",
          "nsites": 10,
          "phase": "oqmd-20884",
          "phase_kind": "structure",
          "spacegroup_number": 74,
          "spacegroup_symbol": "Imma",
          "theoretical": false,
          "x": 0.2
        },
        {
          "collinear": false,
          "degenerate": [],
          "energy": -0.15442125458333322,
          "energy_per_atom": -6.965005468333334,
          "entries_at_x": 3,
          "formula": "Al2 Np1",
          "nsites": 12,
          "phase": "oqmd-1879986",
          "phase_kind": "structure",
          "spacegroup_number": 194,
          "spacegroup_symbol": "P63/mmc",
          "theoretical": true,
          "x": 0.3333333333333333
        },
        {
          "collinear": false,
          "degenerate": [],
          "energy": 0.0,
          "energy_per_atom": -12.94027372125,
          "entries_at_x": 18,
          "formula": "Np1",
          "nsites": 8,
          "phase": "oqmd-17870",
          "phase_kind": "structure",
          "spacegroup_number": 62,
          "spacegroup_symbol": "Pnma",
          "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": 5.551115123125783e-17,
    "only_mp_stable": [
      "oqmd-ref-Np"
    ],
    "only_ours_stable": [],
    "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": "AL-NP",
  "x_element": "NP"
}