{
  "counts": {
    "above_hull": 38,
    "entries": 107,
    "intervals": 8,
    "vertices": 9
  },
  "elements": [
    "GD",
    "ZN"
  ],
  "flags": [
    "has_intermediate_compounds",
    "mp_agreement_not_comparable",
    "theoretical_vertices"
  ],
  "isotherms": [
    {
      "intervals": [
        {
          "intercept": 0.0,
          "kind": "two_phase",
          "left": {
            "phase": "oqmd-9623",
            "x": 0.0
          },
          "mu_a_rel": 0.0,
          "mu_b_rel": -0.6748405275,
          "right": {
            "phase": "oqmd-89768",
            "x": 0.5
          },
          "slope": -0.6748405275,
          "x_hi": 0.5,
          "x_lo": 0.0
        },
        {
          "intercept": -0.18522911749999807,
          "kind": "two_phase",
          "left": {
            "phase": "oqmd-89768",
            "x": 0.5
          },
          "mu_a_rel": -0.18522911749999807,
          "mu_b_rel": -0.48961141000000197,
          "right": {
            "phase": "oqmd-1435772",
            "x": 0.6666666666666666
          },
          "slope": -0.30438229250000387,
          "x_hi": 0.6666666666666666,
          "x_lo": 0.5
        },
        {
          "intercept": -0.6097288925000055,
          "kind": "two_phase",
          "left": {
            "phase": "oqmd-1435772",
            "x": 0.6666666666666666
          },
          "mu_a_rel": -0.6097288925000055,
          "mu_b_rel": -0.2773615224999983,
          "right": {
            "phase": "oqmd-30429",
            "x": 0.75
          },
          "slope": 0.3323673700000072,
          "x_hi": 0.75,
          "x_lo": 0.6666666666666666
        },
        {
          "intercept": -0.8037241662499972,
          "kind": "two_phase",
          "left": {
            "phase": "oqmd-30429",
            "x": 0.75
          },
          "mu_a_rel": -0.8037241662499972,
          "mu_b_rel": -0.21269643125000104,
          "right": {
            "phase": "oqmd-17341",
            "x": 0.7857142857142857
          },
          "slope": 0.5910277349999962,
          "x_hi": 0.7857142857142857,
          "x_lo": 0.75
        },
        {
          "intercept": -0.9706445608333351,
          "kind": "two_phase",
          "left": {
            "phase": "oqmd-17341",
            "x": 0.7857142857142857
          },
          "mu_a_rel": -0.9706445608333351,
          "mu_b_rel": -0.16717268727272705,
          "right": {
            "phase": "oqmd-30432",
            "x": 0.88
          },
          "slope": 0.803471873560608,
          "x_hi": 0.88,
          "x_lo": 0.7857142857142857
        },
        {
          "intercept": -1.2726277817856837,
          "kind": "two_phase",
          "left": {
            "phase": "oqmd-30432",
            "x": 0.88
          },
          "mu_a_rel": -1.2726277817856837,
          "mu_b_rel": -0.1259931571428612,
          "right": {
            "phase": "oqmd-17340",
            "x": 0.8947368421052632
          },
          "slope": 1.1466346246428225,
          "x_hi": 0.8947368421052632,
          "x_lo": 0.88
        },
        {
          "intercept": -2.09405544464288,
          "kind": "two_phase",
          "left": {
            "phase": "oqmd-17340",
            "x": 0.8947368421052632
          },
          "mu_a_rel": -2.09405544464288,
          "mu_b_rel": -0.029354608571426688,
          "right": {
            "phase": "oqmd-30433",
            "x": 0.9230769230769231
          },
          "slope": 2.064700836071453,
          "x_hi": 0.9230769230769231,
          "x_lo": 0.8947368421052632
        },
        {
          "intercept": -2.4463107474999974,
          "kind": "two_phase",
          "left": {
            "phase": "oqmd-30433",
            "x": 0.9230769230769231
          },
          "mu_a_rel": -2.4463107474999974,
          "mu_b_rel": 0.0,
          "right": {
            "phase": "oqmd-122929",
            "x": 1.0
          },
          "slope": 2.4463107474999974,
          "x_hi": 1.0,
          "x_lo": 0.9230769230769231
        }
      ],
      "temperature_K": 0.0,
      "vertices": [
        {
          "collinear": false,
          "degenerate": [],
          "energy": 0.0,
          "energy_per_atom": -4.6550712925,
          "entries_at_x": 19,
          "formula": "Gd1",
          "nsites": 4,
          "phase": "oqmd-9623",
          "phase_kind": "structure",
          "spacegroup_number": 194,
          "spacegroup_symbol": "P63/mmc",
          "theoretical": false,
          "x": 0.0
        },
        {
          "collinear": false,
          "degenerate": [],
          "energy": -0.33742026375,
          "energy_per_atom": -3.29796931,
          "entries_at_x": 23,
          "formula": "Gd1 Zn1",
          "nsites": 2,
          "phase": "oqmd-89768",
          "phase_kind": "structure",
          "spacegroup_number": 221,
          "spacegroup_symbol": "Pm-3m",
          "theoretical": false,
          "x": 0.5
        },
        {
          "collinear": false,
          "degenerate": [],
          "energy": -0.388150645833334,
          "energy_per_atom": -2.7838589433333336,
          "entries_at_x": 7,
          "formula": "Gd1 Zn2",
          "nsites": 6,
          "phase": "oqmd-1435772",
          "phase_kind": "structure",
          "spacegroup_number": 74,
          "spacegroup_symbol": "Imma",
          "theoretical": true,
          "x": 0.6666666666666666
        },
        {
          "collinear": false,
          "degenerate": [],
          "energy": -0.360453365,
          "energy_per_atom": -2.473741288125,
          "entries_at_x": 7,
          "formula": "Gd1 Zn3",
          "nsites": 16,
          "phase": "oqmd-30429",
          "phase_kind": "structure",
          "spacegroup_number": 62,
          "spacegroup_symbol": "Pnma",
          "theoretical": false,
          "x": 0.75
        },
        {
          "collinear": false,
          "degenerate": [],
          "energy": -0.339345231607143,
          "energy_per_atom": -2.33159585142857,
          "entries_at_x": 1,
          "formula": "Gd3 Zn11",
          "nsites": 14,
          "phase": "oqmd-17341",
          "phase_kind": "structure",
          "spacegroup_number": 71,
          "spacegroup_symbol": "Immm",
          "theoretical": false,
          "x": 0.7857142857142857
        },
        {
          "collinear": false,
          "degenerate": [],
          "energy": -0.2635893121,
          "energy_per_atom": -1.9363014512,
          "entries_at_x": 1,
          "formula": "Gd3 Zn22",
          "nsites": 50,
          "phase": "oqmd-30432",
          "phase_kind": "structure",
          "spacegroup_number": 141,
          "spacegroup_symbol": "I41/amd",
          "theoretical": false,
          "x": 0.88
        },
        {
          "collinear": false,
          "degenerate": [],
          "energy": -0.246691538684211,
          "energy_per_atom": -1.86945986421053,
          "entries_at_x": 2,
          "formula": "Gd2 Zn17",
          "nsites": 19,
          "phase": "oqmd-17340",
          "phase_kind": "structure",
          "spacegroup_number": 166,
          "spacegroup_symbol": "R-3m",
          "theoretical": false,
          "x": 0.8947368421052632
        },
        {
          "collinear": false,
          "degenerate": [],
          "energy": -0.188177749807692,
          "energy_per_atom": -1.71490028,
          "entries_at_x": 1,
          "formula": "Gd1 Zn12",
          "nsites": 13,
          "phase": "oqmd-30433",
          "phase_kind": "structure",
          "spacegroup_number": 139,
          "spacegroup_symbol": "I4/mmm",
          "theoretical": false,
          "x": 0.9230769230769231
        },
        {
          "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": 0.0010118650000010554,
    "only_mp_stable": [
      "oqmd-ref-Gd",
      "oqmd-ref-Zn"
    ],
    "only_ours_stable": [
      "oqmd-1435772",
      "oqmd-17340",
      "oqmd-89768"
    ],
    "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": "GD-ZN",
  "x_element": "ZN"
}