{
 "note": "Ambient-pressure candidates: published range of calculated Tc (K), and calculated energy above the convex hull (meV/atom) as [first published value, Alexandria database value on 2026-10-06]. MgB2 is a measured value.",
 "points": [
  {
   "label": "MgB₂",
   "kind": "measured",
   "hull": [
    0,
    0
   ],
   "tc": [
    39,
    39
   ],
   "status": "measured",
   "sources": [
    "nagamatsu2001"
   ]
  },
  {
   "label": "Mo₂Pr₃N₆",
   "kind": "predicted",
   "hull": [
    0,
    0
   ],
   "tc": [
    22.9,
    22.9
   ],
   "status": "best on-hull compound in the survey",
   "sources": [
    "gao2025"
   ]
  },
  {
   "label": "LiMoN₂",
   "kind": "predicted",
   "hull": [
    6,
    6
   ],
   "tc": [
    38,
    46
   ],
   "status": "best near-hull compound",
   "sources": [
    "cerqueira2024sampling",
    "gao2025"
   ]
  },
  {
   "label": "Mg₂RhH₆",
   "kind": "predicted",
   "hull": [
    0,
    49.7
   ],
   "tc": [
    45,
    59
   ],
   "status": "made at 30 to 74 GPa, onsets 18 to 29 K; reverted below about 30 GPa on decompression at room temperature",
   "sources": [
    "sanna2024",
    "zheng2024",
    "cerqueira2024hydrides",
    "wu2026"
   ]
  },
  {
   "label": "Mg₂IrH₆",
   "kind": "predicted",
   "hull": [
    0,
    85.5
   ],
   "tc": [
    59,
    175
   ],
   "status": "not formed; Mg₂IrH₅ forms instead",
   "sources": [
    "dolui2024",
    "sanna2024",
    "cerqueira2024hydrides",
    "hansen2024"
   ]
  },
  {
   "label": "KInH₃",
   "kind": "predicted",
   "hull": [
    77,
    114.6
   ],
   "tc": [
    73,
    73
   ],
   "status": "untested",
   "sources": [
    "cerqueira2024hydrides"
   ]
  },
  {
   "label": "Mg₂PdH₆",
   "kind": "predicted",
   "hull": [
    56,
    195.7
   ],
   "tc": [
    51,
    67
   ],
   "status": "untested",
   "sources": [
    "sanna2024",
    "cerqueira2024hydrides"
   ]
  },
  {
   "label": "Mg₂PtH₆",
   "kind": "predicted",
   "hull": [
    0,
    191.8
   ],
   "tc": [
    64,
    80
   ],
   "status": "did not form from 2:1 Mg-Pt mixtures heated in hydrogen at 9 to 24 GPa; Mg₄Pt₃H₆ formed",
   "sources": [
    "sanna2024",
    "cerqueira2024hydrides",
    "lu2025"
   ]
  },
  {
   "label": "Li₂AuH₆",
   "kind": "predicted",
   "hull": [
    171.5,
    171.5
   ],
   "tc": [
    88,
    140
   ],
   "status": "unstable in path-integral dynamics at 80 K",
   "sources": [
    "ouyang2025",
    "gao2025",
    "ding2026"
   ]
  },
  {
   "label": "Li₂AgH₆",
   "kind": "predicted",
   "hull": [
    319.1,
    319.1
   ],
   "tc": [
    83,
    132
   ],
   "status": "collapses in path-integral dynamics at 80 K",
   "sources": [
    "gao2025",
    "ding2026"
   ]
  },
  {
   "label": "PdH₄",
   "kind": "predicted",
   "hull": [
    318.9,
    318.9
   ],
   "tc": [
    133,
    146
   ],
   "status": "harmonic calculation only",
   "sources": [
    "li2026pdh4"
   ]
  }
 ],
 "metastability_median": 15,
 "metastability_p90": 67
}