| # | Species | Formula |
| 6210 | Niobium(V) tetraiodide, cation (Geo) | NbI4 | |
| 6211 | Niobium(V) tetraiodide, cation | NbI4 | |
| 6212 | Rhodium(V) tetraiodide (Geo) | RhI4 | |
| 6213 | Rhodium(V) tetraiodide | RhI4 | |
| 6214 | Palladium(II) tetraiodide | PdI4 | |
| 6215 | Palladium(II) tetraiodide (Geo) | PdI4 | |
| 6216 | Cd(II)I4(2-) (HIBRUF) (Geo) | CdI4 | |
| 6217 | Cd(II)I4(2-) (HIBRUF) | CdI4 | |
| 6218 | In(III)I4(-) (AHOMIT) (Geo) | InI4 | |
| 6219 | In(III)I4(-) (AHOMIT) | InI4 | |
| 6220 | Sb(III)I4(-) (PICOIA) (Geo) | SbI4 | |
| 6221 | Sb(III)I4(-) (PICOIA) | SbI4 | |
| 6222 | Sb2I4 | Sb2I4 | |
| 6223 | Sb2I4 (Geo) | Sb2I4 | |
| 6224 | Te(II)I4(2-) (DAMFIG) (Geo) | TeI4 | |
| 6225 | Te(II)I4(2-) (DAMFIG) | TeI4 | |
| 6226 | Te(IV)CI4(-) (IJOJAS) (Geo) | C6H5TeI4 | |
| 6227 | Te(IV)CI4(-) (IJOJAS) | C6H5TeI4 | |
| 6228 | vanadium(V) pentaiodide | VI5 | |
| 6229 | vanadium(V) pentaiodide (Geo) | VI5 | |
| 6230 | Aluminum triiodide (Al2I6) (Geo) | Al2I6 | |