{
 "formula": "Cs3RbAs4",
 "nsites": 8,
 "decomposition": [
  {
   "id": "agm003219892",
   "formula": "RbAs",
   "frac": 0.25,
   "nsites": 16
  },
  {
   "id": "agm004468642",
   "formula": "CsAs",
   "frac": 0.75,
   "nsites": 16
  }
 ]
}