{
  "counts": {
    "above_hull": 5,
    "entries": 15,
    "intervals": 4,
    "vertices": 5
  },
  "elements": [
    "HF",
    "IR"
  ],
  "flags": [
    "has_intermediate_compounds",
    "theoretical_vertices"
  ],
  "isotherms": [
    {
      "intervals": [
        {
          "intercept": 0.0,
          "kind": "two_phase",
          "left": {
            "phase": "mp-aaaaaadz",
            "x": 0.0
          },
          "mu_a_rel": 0.0,
          "mu_b_rel": -2.1975910711111086,
          "right": {
            "phase": "mp-aaacqzqp",
            "x": 0.375
          },
          "slope": -2.1975910711111086,
          "x_hi": 0.375,
          "x_lo": 0.0
        },
        {
          "intercept": -0.45242481166666826,
          "kind": "two_phase",
          "left": {
            "phase": "mp-aaacqzqp",
            "x": 0.375
          },
          "mu_a_rel": -0.45242481166666826,
          "mu_b_rel": -1.4435497183333283,
          "right": {
            "phase": "mp-aaacfiva",
            "x": 0.5
          },
          "slope": -0.9911249066666601,
          "x_hi": 0.5,
          "x_lo": 0.375
        },
        {
          "intercept": -1.2098318649999946,
          "kind": "two_phase",
          "left": {
            "phase": "mp-aaacfiva",
            "x": 0.5
          },
          "mu_a_rel": -1.2098318649999946,
          "mu_b_rel": -0.686142665000002,
          "right": {
            "phase": "mp-aaaaaddu",
            "x": 0.75
          },
          "slope": 0.5236891999999926,
          "x_hi": 0.75,
          "x_lo": 0.5
        },
        {
          "intercept": -3.2682598600000006,
          "kind": "two_phase",
          "left": {
            "phase": "mp-aaaaaddu",
            "x": 0.75
          },
          "mu_a_rel": -3.2682598600000006,
          "mu_b_rel": 0.0,
          "right": {
            "phase": "mp-aaaaaadx",
            "x": 1.0
          },
          "slope": 3.2682598600000006,
          "x_hi": 1.0,
          "x_lo": 0.75
        }
      ],
      "temperature_K": 0.0,
      "vertices": [
        {
          "collinear": false,
          "degenerate": [],
          "energy": 0.0,
          "energy_per_atom": -9.95718903,
          "entries_at_x": 4,
          "formula": "Hf",
          "nsites": 2,
          "phase": "mp-aaaaaadz",
          "phase_kind": "structure",
          "spacegroup_number": 194,
          "spacegroup_symbol": "P6_3/mmc",
          "theoretical": false,
          "x": 0.0
        },
        {
          "collinear": false,
          "degenerate": [],
          "energy": -0.8240966516666658,
          "energy_per_atom": -10.361752612916666,
          "entries_at_x": 2,
          "formula": "Hf5Ir3",
          "nsites": 48,
          "phase": "mp-aaacqzqp",
          "phase_kind": "structure",
          "spacegroup_number": 178,
          "spacegroup_symbol": "P6_122",
          "theoretical": true,
          "x": 0.375
        },
        {
          "collinear": false,
          "degenerate": [],
          "energy": -0.9479872649999983,
          "energy_per_atom": -10.34579887,
          "entries_at_x": 4,
          "formula": "HfIr",
          "nsites": 4,
          "phase": "mp-aaacfiva",
          "phase_kind": "structure",
          "spacegroup_number": 11,
          "spacegroup_symbol": "P2_1/m",
          "theoretical": true,
          "x": 0.5
        },
        {
          "collinear": false,
          "degenerate": [],
          "energy": -0.8170649650000001,
          "energy_per_atom": -9.9351878575,
          "entries_at_x": 1,
          "formula": "HfIr3",
          "nsites": 4,
          "phase": "mp-aaaaaddu",
          "phase_kind": "structure",
          "spacegroup_number": 221,
          "spacegroup_symbol": "Pm-3m",
          "theoretical": false,
          "x": 0.75
        },
        {
          "collinear": false,
          "degenerate": [],
          "energy": 0.0,
          "energy_per_atom": -8.83843418,
          "entries_at_x": 4,
          "formula": "Ir",
          "nsites": 1,
          "phase": "mp-aaaaaadx",
          "phase_kind": "structure",
          "spacegroup_number": 225,
          "spacegroup_symbol": "Fm-3m",
          "theoretical": false,
          "x": 1.0
        }
      ]
    }
  ],
  "mp_agreement": {
    "comparable": true,
    "comparable_note": "",
    "max_abs_delta_energy_above_hull": 6.661338147750939e-16,
    "only_mp_stable": [],
    "only_ours_stable": [],
    "stable_sets_match": true
  },
  "provenance": {
    "above_hull_window_eV": 0.05,
    "builder_version": 1,
    "collinear_tol": 1e-12,
    "correction_model": "MP2020 (applied upstream by the Materials Project; none added)",
    "degenerate_tol": 1e-06,
    "entry_pool": "all_nondeprecated",
    "is_stable_source": "upstream_flag",
    "observed_at": "2026-09-01T20:54:47Z",
    "snapshot_scope_elements": [],
    "snapshot_scope_kind": "full",
    "snapshot_sha256": "b6deba8ecf1b67211b3d89cd33a5f98a1939d4bcd92db561818195e55187492a",
    "source_release": "2026.04.13",
    "stability_tol": 0.0001,
    "thermo_type": "GGA_GGA+U",
    "upstream_energy_corrections": "MP2020 compatibility corrections (anion and GGA/GGA+U mixing corrections), applied by the Materials Project to its GGA_GGA+U thermo energies"
  },
  "reference": {
    "kind": "dft_elemental_ground_state_0K",
    "per": "atom",
    "temperature_K": 0.0,
    "units": "eV/atom"
  },
  "schema_version": 1,
  "system_id": "HF-IR",
  "x_element": "IR"
}
