| # | Species | Formula |
| 6191 | Fe(III)I4(-) (Geo) | FeI4 | |
| 6192 | Nickel(II) tetraiodide D4h (Geo) | NiI4 | |
| 6193 | Nickel(II) tetraiodide D4h | NiI4 | |
| 6194 | Copper(II) tetraiodide (Geo) | CuI4 | |
| 6195 | Cu(I)2I4(2-) (BIYMIF) (Geo) | Cu2I4 | |
| 6196 | Cu(I)2I4(2-) (BIYMIF) | Cu2I4 | |
| 6197 | Zn(II)I4(2-) (BZDAZP) (Geo) | ZnI4 | |
| 6198 | Zn(II)I4(2-) (BZDAZP) | ZnI4 | |
| 6199 | Ga(III)2I4S2 (DIGZAU) (Geo) | C6H14S2Ga2I4 | |
| 6200 | Ga(III)2I4S2 (DIGZAU) | C6H14S2Ga2I4 | |
| 6201 | Ga(III)4I4S6 (CIFMOT) (Geo) | C4H12S6Ga4I4 | |
| 6202 | Ga(III)4I4S6 (CIFMOT) | C4H12S6Ga4I4 | |
| 6203 | GeI4 (JEDXEV) (Geo) | GeI4 | |
| 6204 | GeI4 (JEDXEV) | GeI4 | |
| 6205 | Germanium tetraiodide (Geo) | GeI4 | |
| 6206 | Germanium tetraiodide | GeI4 | |
| 6207 | Ge2C4I4 (IGECHD10) (Geo) | C4H4Ge2I4 | |
| 6208 | Ge2C4I4 (IGECHD10) | C4H4Ge2I4 | |
| 6209 | Zirconium tetraiodide | ZrI4 | |
| 6210 | Niobium(V) tetraiodide, cation (Geo) | NbI4 | |
| 6211 | Niobium(V) tetraiodide, cation | NbI4 | |