{
  "counts": {
    "above_hull": 31,
    "entries": 135,
    "intervals": 6,
    "vertices": 7
  },
  "elements": [
    "PT",
    "ZR"
  ],
  "flags": [
    "has_intermediate_compounds",
    "mp_agreement_not_comparable",
    "theoretical_vertices"
  ],
  "isotherms": [
    {
      "intervals": [
        {
          "intercept": 0.0,
          "kind": "two_phase",
          "left": {
            "phase": "oqmd-7522",
            "x": 0.0
          },
          "mu_a_rel": 0.0,
          "mu_b_rel": -4.464865429999992,
          "right": {
            "phase": "oqmd-1374867",
            "x": 0.1111111111111111
          },
          "slope": -4.464865429999992,
          "x_hi": 0.1111111111111111,
          "x_lo": 0.0
        },
        {
          "intercept": -0.0702926789999983,
          "kind": "two_phase",
          "left": {
            "phase": "oqmd-1374867",
            "x": 0.1111111111111111
          },
          "mu_a_rel": -0.0702926789999983,
          "mu_b_rel": -3.9025239980000053,
          "right": {
            "phase": "oqmd-2017725",
            "x": 0.25
          },
          "slope": -3.832231319000007,
          "x_hi": 0.25,
          "x_lo": 0.1111111111111111
        },
        {
          "intercept": -0.9706640824999999,
          "kind": "two_phase",
          "left": {
            "phase": "oqmd-2017725",
            "x": 0.25
          },
          "mu_a_rel": -0.9706640824999999,
          "mu_b_rel": -1.2014097875000003,
          "right": {
            "phase": "oqmd-30995",
            "x": 0.5
          },
          "slope": -0.23074570500000036,
          "x_hi": 0.5,
          "x_lo": 0.25
        },
        {
          "intercept": -2.0597603399999995,
          "kind": "two_phase",
          "left": {
            "phase": "oqmd-30995",
            "x": 0.5
          },
          "mu_a_rel": -2.0597603399999995,
          "mu_b_rel": -0.11231353000000022,
          "right": {
            "phase": "oqmd-1373540",
            "x": 0.6666666666666666
          },
          "slope": 1.9474468099999993,
          "x_hi": 0.6666666666666666,
          "x_lo": 0.5
        },
        {
          "intercept": -2.2131506000000005,
          "kind": "two_phase",
          "left": {
            "phase": "oqmd-1373540",
            "x": 0.6666666666666666
          },
          "mu_a_rel": -2.2131506000000005,
          "mu_b_rel": -0.03561839999999972,
          "right": {
            "phase": "oqmd-1800426",
            "x": 0.75
          },
          "slope": 2.177532200000001,
          "x_hi": 0.75,
          "x_lo": 0.6666666666666666
        },
        {
          "intercept": -2.3200058000000006,
          "kind": "two_phase",
          "left": {
            "phase": "oqmd-1800426",
            "x": 0.75
          },
          "mu_a_rel": -2.3200058000000006,
          "mu_b_rel": 0.0,
          "right": {
            "phase": "oqmd-67408",
            "x": 1.0
          },
          "slope": 2.3200058000000006,
          "x_hi": 1.0,
          "x_lo": 0.75
        }
      ],
      "temperature_K": 0.0,
      "vertices": [
        {
          "collinear": false,
          "degenerate": [],
          "energy": 0.0,
          "energy_per_atom": -6.05575959,
          "entries_at_x": 28,
          "formula": "Pt1",
          "nsites": 1,
          "phase": "oqmd-7522",
          "phase_kind": "structure",
          "spacegroup_number": 225,
          "spacegroup_symbol": "Fm-3m",
          "theoretical": false,
          "x": 0.0
        },
        {
          "collinear": false,
          "degenerate": [],
          "energy": -0.496096158888888,
          "energy_per_atom": -6.828679388888889,
          "entries_at_x": 1,
          "formula": "Pt8 Zr1",
          "nsites": 9,
          "phase": "oqmd-1374867",
          "phase_kind": "structure",
          "spacegroup_number": 139,
          "spacegroup_symbol": "I4/mmm",
          "theoretical": true,
          "x": 0.1111111111111111
        },
        {
          "collinear": false,
          "degenerate": [],
          "energy": -1.02835050875,
          "energy_per_atom": -7.70696328875,
          "entries_at_x": 11,
          "formula": "Pt3 Zr1",
          "nsites": 16,
          "phase": "oqmd-2017725",
          "phase_kind": "structure",
          "spacegroup_number": 194,
          "spacegroup_symbol": "P63/mmc",
          "theoretical": true,
          "x": 0.25
        },
        {
          "collinear": false,
          "degenerate": [],
          "energy": -1.086036935,
          "energy_per_atom": -8.387502905,
          "entries_at_x": 30,
          "formula": "Pt1 Zr1",
          "nsites": 4,
          "phase": "oqmd-30995",
          "phase_kind": "structure",
          "spacegroup_number": 63,
          "spacegroup_symbol": "Cmcm",
          "theoretical": false,
          "x": 0.5
        },
        {
          "collinear": false,
          "degenerate": [],
          "energy": -0.761462466666667,
          "energy_per_atom": -8.478163896666667,
          "entries_at_x": 10,
          "formula": "Pt1 Zr2",
          "nsites": 6,
          "phase": "oqmd-1373540",
          "phase_kind": "structure",
          "spacegroup_number": 140,
          "spacegroup_symbol": "I4/mcm",
          "theoretical": true,
          "x": 0.6666666666666666
        },
        {
          "collinear": false,
          "degenerate": [],
          "energy": -0.5800014500000001,
          "energy_per_atom": -8.50432061,
          "entries_at_x": 10,
          "formula": "Pt1 Zr3",
          "nsites": 16,
          "phase": "oqmd-1800426",
          "phase_kind": "structure",
          "spacegroup_number": 121,
          "spacegroup_symbol": "I-42m",
          "theoretical": true,
          "x": 0.75
        },
        {
          "collinear": false,
          "degenerate": [],
          "energy": 0.0,
          "energy_per_atom": -8.54717235,
          "entries_at_x": 30,
          "formula": "Zr1",
          "nsites": 2,
          "phase": "oqmd-67408",
          "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": 0.0010356599999985505,
    "only_mp_stable": [
      "oqmd-758445",
      "oqmd-ref-Pt",
      "oqmd-ref-Zr"
    ],
    "only_ours_stable": [
      "oqmd-1374867",
      "oqmd-30995"
    ],
    "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": "PT-ZR",
  "x_element": "ZR"
}