{
  "counts": {
    "above_hull": 22,
    "entries": 90,
    "intervals": 7,
    "vertices": 8
  },
  "elements": [
    "SN",
    "Y"
  ],
  "flags": [
    "degenerate_endpoints",
    "has_intermediate_compounds",
    "mp_agreement_not_comparable",
    "theoretical_vertices"
  ],
  "isotherms": [
    {
      "intervals": [
        {
          "intercept": 0.0,
          "kind": "two_phase",
          "left": {
            "phase": "oqmd-ref-Sn",
            "x": 0.0
          },
          "mu_a_rel": 0.0,
          "mu_b_rel": -2.0730620746280017,
          "right": {
            "phase": "oqmd-1484182",
            "x": 0.2857142857142857
          },
          "slope": -2.0730620746280017,
          "x_hi": 0.2857142857142857,
          "x_lo": 0.0
        },
        {
          "intercept": -0.13119733185119498,
          "kind": "two_phase",
          "left": {
            "phase": "oqmd-1484182",
            "x": 0.2857142857142857
          },
          "mu_a_rel": -0.13119733185119498,
          "mu_b_rel": -1.7450687450000142,
          "right": {
            "phase": "oqmd-26304",
            "x": 0.3333333333333333
          },
          "slope": -1.6138714131488192,
          "x_hi": 0.3333333333333333,
          "x_lo": 0.2857142857142857
        },
        {
          "intercept": -0.38739427685120226,
          "kind": "two_phase",
          "left": {
            "phase": "oqmd-26304",
            "x": 0.3333333333333333
          },
          "mu_a_rel": -0.38739427685120226,
          "mu_b_rel": -1.2326748549999997,
          "right": {
            "phase": "oqmd-1372829",
            "x": 0.5
          },
          "slope": -0.8452805781487974,
          "x_hi": 0.5,
          "x_lo": 0.3333333333333333
        },
        {
          "intercept": -0.6575061168511931,
          "kind": "two_phase",
          "left": {
            "phase": "oqmd-1372829",
            "x": 0.5
          },
          "mu_a_rel": -0.6575061168511931,
          "mu_b_rel": -0.962563015000009,
          "right": {
            "phase": "oqmd-2053254",
            "x": 0.5238095238095238
          },
          "slope": -0.30505689814881587,
          "x_hi": 0.5238095238095238,
          "x_lo": 0.5
        },
        {
          "intercept": -0.6741111668512054,
          "kind": "two_phase",
          "left": {
            "phase": "oqmd-2053254",
            "x": 0.5238095238095238
          },
          "mu_a_rel": -0.6741111668512054,
          "mu_b_rel": -0.9474675149999978,
          "right": {
            "phase": "oqmd-2053253",
            "x": 0.5555555555555556
          },
          "slope": -0.27335634814879234,
          "x_hi": 0.5555555555555556,
          "x_lo": 0.5238095238095238
        },
        {
          "intercept": -0.992908441851202,
          "kind": "two_phase",
          "left": {
            "phase": "oqmd-2053253",
            "x": 0.5555555555555556
          },
          "mu_a_rel": -0.992908441851202,
          "mu_b_rel": -0.6924296950000005,
          "right": {
            "phase": "oqmd-31089",
            "x": 0.625
          },
          "slope": 0.30047874685120146,
          "x_hi": 0.625,
          "x_lo": 0.5555555555555556
        },
        {
          "intercept": -2.1469579335178692,
          "kind": "two_phase",
          "left": {
            "phase": "oqmd-31089",
            "x": 0.625
          },
          "mu_a_rel": -2.1469579335178692,
          "mu_b_rel": 0.0,
          "right": {
            "phase": "oqmd-ref-Y",
            "x": 1.0
          },
          "slope": 2.1469579335178692,
          "x_hi": 1.0,
          "x_lo": 0.625
        }
      ],
      "temperature_K": 0.0,
      "vertices": [
        {
          "collinear": false,
          "degenerate": [],
          "energy": 0.0,
          "energy_per_atom": -4.007039,
          "entries_at_x": 28,
          "formula": "Sn",
          "nsites": null,
          "phase": "oqmd-ref-Sn",
          "phase_kind": "structure",
          "spacegroup_number": null,
          "spacegroup_symbol": "",
          "theoretical": false,
          "x": 0.0
        },
        {
          "collinear": false,
          "degenerate": [],
          "energy": -0.5923034498937148,
          "energy_per_atom": -5.2350614335714285,
          "entries_at_x": 1,
          "formula": "Sn5 Y2",
          "nsites": 14,
          "phase": "oqmd-1484182",
          "phase_kind": "structure",
          "spacegroup_number": 59,
          "spacegroup_symbol": "Pmmn",
          "theoretical": true,
          "x": 0.2857142857142857
        },
        {
          "collinear": false,
          "degenerate": [],
          "energy": -0.669154469567468,
          "energy_per_atom": -5.43335663,
          "entries_at_x": 4,
          "formula": "Sn2 Y1",
          "nsites": 6,
          "phase": "oqmd-26304",
          "phase_kind": "structure",
          "spacegroup_number": 63,
          "spacegroup_symbol": "Cmcm",
          "theoretical": false,
          "x": 0.3333333333333333
        },
        {
          "collinear": false,
          "degenerate": [],
          "energy": -0.810034565925601,
          "energy_per_atom": -5.999291345,
          "entries_at_x": 9,
          "formula": "Sn1 Y1",
          "nsites": 4,
          "phase": "oqmd-1372829",
          "phase_kind": "structure",
          "spacegroup_number": 63,
          "spacegroup_symbol": "Cmcm",
          "theoretical": true,
          "x": 0.5
        },
        {
          "collinear": false,
          "degenerate": [],
          "energy": -0.8172978254053347,
          "energy_per_atom": -6.067276692857143,
          "entries_at_x": 1,
          "formula": "Sn10 Y11",
          "nsites": 42,
          "phase": "oqmd-2053254",
          "phase_kind": "structure",
          "spacegroup_number": 139,
          "spacegroup_symbol": "I4/mmm",
          "theoretical": true,
          "x": 0.5238095238095238
        },
        {
          "collinear": false,
          "degenerate": [],
          "energy": -0.8259758047116456,
          "energy_per_atom": -6.156917456666666,
          "entries_at_x": 2,
          "formula": "Sn4 Y5",
          "nsites": 36,
          "phase": "oqmd-2053253",
          "phase_kind": "structure",
          "spacegroup_number": 62,
          "spacegroup_symbol": "Pnma",
          "theoretical": true,
          "x": 0.5555555555555556
        },
        {
          "collinear": false,
          "degenerate": [],
          "energy": -0.805109225069201,
          "energy_per_atom": -6.313156968125,
          "entries_at_x": 1,
          "formula": "Sn3 Y5",
          "nsites": 16,
          "phase": "oqmd-31089",
          "phase_kind": "structure",
          "spacegroup_number": 193,
          "spacegroup_symbol": "P63/mcm",
          "theoretical": false,
          "x": 0.625
        },
        {
          "collinear": false,
          "degenerate": [
            {
              "energy": 0.0,
              "phase": "oqmd-2030142"
            }
          ],
          "energy": 0.0,
          "energy_per_atom": -6.465211305,
          "entries_at_x": 25,
          "formula": "Y",
          "nsites": null,
          "phase": "oqmd-ref-Y",
          "phase_kind": "structure",
          "spacegroup_number": null,
          "spacegroup_symbol": "",
          "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": 2.6836973754384985e-09,
    "only_mp_stable": [
      "oqmd-51193"
    ],
    "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": "SN-Y",
  "x_element": "Y"
}
