| Ferrum(II) Acetate | Fe(C2H3O2)2 | 173.93304 |
| Ferrum(II) Aluminate | Fe(AlO2)2 | 173.80568 |
| Ferrum(II) Bromide | FeBr2 | 215.653 |
| Ferrum(II) Carbonate | FeCO3 | 115.8539 |
| Ferrum(II) Chloride | FeCl2 | 126.751 |
| Ferrum(II) Chloride Dihydrate | FeCl2.2H2O | 162.78156 |
| Ferrum(II) Chloride Tetrahydrate | FeCl2.4H2O | 198.81212 |
| Ferrum(II) Dihydrogen Phosphate | FeO8H4P2 | 249.81948 |
| Ferrum(II) Fluoride | FeF2 | 93.84181 |
| Ferrum(II) Fluoride Tetrahydrate | FeF2.4H2O | 165.90293 |
| Ferrum(II) Hydroxide | Fe(OH)2 | 89.85968 |
| Ferrum(II) Iodide | FeI2 | 309.65394 |
| Ferrum(II) Iodide Tetrahydrate | FeI2.4H2O | 381.71506 |
| Ferrum(II) Metatitanate | FeTiO3 | 151.7102 |
| Ferrum(II) Metazirconate | FeZrO3 | 195.0672 |
| Ferrum(II) Molybdate | FeMoO4 | 215.7826 |
| Ferrum(II) Nitrate | Fe(NO3)2 | 179.8548 |
| Ferrum(II) Orthomolybdate | FeMoO4 | 215.7826 |
| Ferrum(II) Orthosilicate | Fe2SiO4 | 203.7731 |
| Ferrum(II) Orthotungstate | FeWO4 | 303.6826 |
| Ferrum(II) Oxalate | FeC2O4 | 143.864 |
| Ferrum(II) Oxide | FeO | 71.8444 |
| Ferrum(II) Phosphate | Fe3(PO4)2 | 357.47772 |
| Ferrum(II) Selenide | FeSe | 134.805 |
| Ferrum(II) Sulfate | FeSO4 | 151.9076 |
| Ferrum(II) Sulfide | FeS | 87.91 |
| Ferrum(II) Telluride | FeTe | 183.445 |
| Ferrum(II) Titanate | FeTiO3 | 151.7102 |
| Ferrum(II) Tungstate | FeWO4 | 303.6826 |
| Ferrum(II,III) Oxide | Fe3O4 | 231.5326 |
| Ferrum(III) Arsenic | FeAs | 130.7666 |
| Ferrum(III) Bromide | FeBr3 | 295.557 |
| Ferrum(III) Bromide Hexahydrate | FeBr3.6H2O | 403.64868 |
| Ferrum(III) Chloride | FeCl3 | 162.204 |
| Ferrum(III) Chloride Hexahydrate | FeCl3.6H2O | 270.29568 |
| Ferrum(III) Chromate | Fe2(CrO4)3 | 459.6711 |
| Ferrum(III) Dichromate | Fe2(Cr2O7)3 | 759.654 |
| Ferrum(III) Ferrocyanide | Fe4(Fe(CN)6)3 | 859.2282 |
| Ferrum(III) Fluoride | FeF3 | 112.84021 |
| Ferrum(III) Fluoride Trihydrate | FeF3.3H2O | 166.88605 |
| Ferrum(III) Hexacyanoferrate(II) | Fe4[Fe(CN)6]3 | 859.2282 |
| Ferrum(III) Hydroxide | Fe(OH)3 | 106.86702 |
| Ferrum(III) Hypophosphite | Fe(H2PO2)3 | 250.81032 |
| Ferrum(III) Iodide | FeI3 | 436.55841 |
| Ferrum(III) Metavanadate | Fe(VO3)3 | 352.6641 |
| Ferrum(III) Nitrate | Fe(NO3)3 | 241.8597 |
| Ferrum(III) Orthotungstate | Fe2W3O12 | 855.2028 |
| Ferrum(III) Orthovanadate | FeVO4 | 170.7841 |
| Ferrum(III) Oxalate | Fe2(C2O4)3 | 375.747 |
| Ferrum(III) Oxide | Fe2O3 | 159.6882 |
| Ferrum(III) Phosphate | FePO4 | 150.81636 |
| Ferrum(III) Phosphide | FeP | 86.81876 |
| Ferrum(III) Pyrophosphate | Fe4(P2O7)3 | 745.20997 |
| Ferrum(III) Sulfate | Fe2(SO4)3 | 399.8778 |
| Ferrum(III) Thiocyanate | Fe(SCN)3 | 230.0922 |