{
  "counts": {
    "above_hull": 32,
    "entries": 113,
    "intervals": 6,
    "vertices": 7
  },
  "elements": [
    "CU",
    "PT"
  ],
  "flags": [
    "has_intermediate_compounds",
    "mp_agreement_not_comparable",
    "theoretical_vertices"
  ],
  "isotherms": [
    {
      "intervals": [
        {
          "intercept": 0.0,
          "kind": "two_phase",
          "left": {
            "phase": "oqmd-635950",
            "x": 0.0
          },
          "mu_a_rel": 0.0,
          "mu_b_rel": -0.6604386899999994,
          "right": {
            "phase": "oqmd-2131717",
            "x": 0.125
          },
          "slope": -0.6604386899999994,
          "x_hi": 0.125,
          "x_lo": 0.0
        },
        {
          "intercept": -0.024209265000000868,
          "kind": "two_phase",
          "left": {
            "phase": "oqmd-2131717",
            "x": 0.125
          },
          "mu_a_rel": -0.024209265000000868,
          "mu_b_rel": -0.49097383499999336,
          "right": {
            "phase": "oqmd-29766",
            "x": 0.25
          },
          "slope": -0.4667645699999925,
          "x_hi": 0.25,
          "x_lo": 0.125
        },
        {
          "intercept": -0.11259792999999799,
          "kind": "two_phase",
          "left": {
            "phase": "oqmd-29766",
            "x": 0.25
          },
          "mu_a_rel": -0.11259792999999799,
          "mu_b_rel": -0.225807840000002,
          "right": {
            "phase": "oqmd-18532",
            "x": 0.5
          },
          "slope": -0.11320991000000402,
          "x_hi": 0.5,
          "x_lo": 0.25
        },
        {
          "intercept": -0.27261691499999996,
          "kind": "two_phase",
          "left": {
            "phase": "oqmd-18532",
            "x": 0.5
          },
          "mu_a_rel": -0.27261691499999996,
          "mu_b_rel": -0.06578885499999998,
          "right": {
            "phase": "oqmd-349751",
            "x": 0.75
          },
          "slope": 0.20682805999999998,
          "x_hi": 0.75,
          "x_lo": 0.5
        },
        {
          "intercept": -0.36540771750000123,
          "kind": "two_phase",
          "left": {
            "phase": "oqmd-349751",
            "x": 0.75
          },
          "mu_a_rel": -0.36540771750000123,
          "mu_b_rel": -0.034858587499999594,
          "right": {
            "phase": "oqmd-18915",
            "x": 0.875
          },
          "slope": 0.33054913000000163,
          "x_hi": 0.875,
          "x_lo": 0.75
        },
        {
          "intercept": -0.6094178299999984,
          "kind": "two_phase",
          "left": {
            "phase": "oqmd-18915",
            "x": 0.875
          },
          "mu_a_rel": -0.6094178299999984,
          "mu_b_rel": 0.0,
          "right": {
            "phase": "oqmd-7522",
            "x": 1.0
          },
          "slope": 0.6094178299999984,
          "x_hi": 1.0,
          "x_lo": 0.875
        }
      ],
      "temperature_K": 0.0,
      "vertices": [
        {
          "collinear": false,
          "degenerate": [],
          "energy": 0.0,
          "energy_per_atom": -3.71672418,
          "entries_at_x": 46,
          "formula": "Cu1",
          "nsites": 1,
          "phase": "oqmd-635950",
          "phase_kind": "structure",
          "spacegroup_number": 225,
          "spacegroup_symbol": "Fm-3m",
          "theoretical": false,
          "x": 0.0
        },
        {
          "collinear": false,
          "degenerate": [],
          "energy": -0.08255483624999993,
          "energy_per_atom": -4.09098926,
          "entries_at_x": 1,
          "formula": "Cu7 Pt1",
          "nsites": 8,
          "phase": "oqmd-2131717",
          "phase_kind": "structure",
          "spacegroup_number": 225,
          "spacegroup_symbol": "Fm-3m",
          "theoretical": true,
          "x": 0.125
        },
        {
          "collinear": false,
          "degenerate": [],
          "energy": -0.140900407499999,
          "energy_per_atom": -4.441809855,
          "entries_at_x": 8,
          "formula": "Cu3 Pt1",
          "nsites": 4,
          "phase": "oqmd-29766",
          "phase_kind": "structure",
          "spacegroup_number": 221,
          "spacegroup_symbol": "Pm-3m",
          "theoretical": false,
          "x": 0.25
        },
        {
          "collinear": false,
          "degenerate": [],
          "energy": -0.169202885,
          "energy_per_atom": -5.05506238,
          "entries_at_x": 13,
          "formula": "Cu1 Pt1",
          "nsites": 2,
          "phase": "oqmd-18532",
          "phase_kind": "structure",
          "spacegroup_number": 166,
          "spacegroup_symbol": "R-3m",
          "theoretical": false,
          "x": 0.5
        },
        {
          "collinear": false,
          "degenerate": [],
          "energy": -0.11749587,
          "energy_per_atom": -5.5883054125,
          "entries_at_x": 8,
          "formula": "Cu1 Pt3",
          "nsites": 4,
          "phase": "oqmd-349751",
          "phase_kind": "structure",
          "spacegroup_number": 221,
          "spacegroup_symbol": "Pm-3m",
          "theoretical": true,
          "x": 0.75
        },
        {
          "collinear": false,
          "degenerate": [],
          "energy": -0.0761772287499998,
          "energy_per_atom": -5.839461795,
          "entries_at_x": 1,
          "formula": "Cu1 Pt7",
          "nsites": 8,
          "phase": "oqmd-18915",
          "phase_kind": "structure",
          "spacegroup_number": 225,
          "spacegroup_symbol": "Fm-3m",
          "theoretical": false,
          "x": 0.875
        },
        {
          "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": 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": 0.00018982750000071102,
    "only_mp_stable": [
      "oqmd-ref-Cu",
      "oqmd-ref-Pt"
    ],
    "only_ours_stable": [
      "oqmd-29766",
      "oqmd-349751"
    ],
    "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": "CU-PT",
  "x_element": "PT"
}