| # | Species | Formula |
| 6279 | Cs(I)(C6)2O2(+) (WIVRAU) | C26H24O2Cs | |
| 6280 | Cesium nitrite (Geo) | NO2Cs | |
| 6281 | Cesium nitrate | NO3Cs | |
| 6282 | Cesium nitrate (Geo) | NO3Cs | |
| 6283 | Cs(+)(H2O)4 | H8O4Cs | |
| 6284 | Cs(+)(H2O)4 (Geo) | H8O4Cs | |
| 6285 | Cs(I)O6(+) (CSTHXD) (Geo) | C12H24O6Cs | |
| 6286 | Cs(I)O6(+) (CSTHXD) | C12H24O6Cs | |
| 6287 | Cs(I)(Cp)O6 (QEXTOC) (Geo) | C17H29O6Cs | |
| 6288 | Cs(I)(Cp)O6 (QEXTOC) | C17H29O6Cs | |
| 6289 | Cs(I)O6N2(+) (CSCRYP10) (Geo) | C18H36N2O6Cs | |
| 6290 | Cs(I)O6N2(+) (CSCRYP10) | C18H36N2O6Cs | |
| 6291 | Cs(0)O8 (DUBCIM) (Geo) | C24H48O12Cs | |
| 6292 | Cs(0)O8 (DUBCIM) | C24H48O12Cs | |
| 6293 | Nonactin-cesium (NONACU) (Geo) | C40H64O12Cs | |
| 6294 | Cesium fluoride | FCs | |
| 6295 | Cesium fluoride (Geo) | FCs | |
| 6296 | Cs(+)(H2O)3.F | H6O3FCs | |
| 6297 | Cs(+)(H2O)3.F (Geo) | H6O3FCs | |
| 6298 | Cesium tetrafluoroaluminate | F4AlCs | |
| 6299 | Cesium metaphosphate (Geo) | O3PCs | |