Material Index
| Name | Formula | Classifications | Members | Image | Lines | Spectra | Techniques | Tags |
|---|---|---|---|---|---|---|---|---|
| Ice | H2O | — | — | 8 | 0 | — | Mineral, Simple oxide | |
| Ice-VII | H2O | — | — | 0 | 0 | — | Mineral, Simple oxide | |
| Iceland spar | CaCO3 | Calcite | — | 3 | 3 | PL/Laser | Variety, Carbonate | |
| Idrialite | C22H14 | — | — | 7 | 0 | — | Mineral, Organic | |
| Illite | K0.65Al2.0[Al0.65Si3.35O10](OH)2 | Muscovite | — | 0 | 0 | — | Hydroxide, Aluminosilicate , Variety | |
| Ilmenite | FeTiO3, FeIITiIVO3, (Fe,Mn)TiO3 | — | — | 0 | 3 | EDS | Mineral, Titanate | |
| Ilmenorutile | (Ti,Nb)O2 | Rutile | — | 0 | 0 | — | Titanate , Niobate, Variety | |
| Indium | In | — | — | 10 | 0 | — | Metal , Mineral , Element | |
| Indium arsenide | InAs | — | — | 0 | 0 | — | Synthetic , Compound, Arsenide | |
| Indium gallium nitride | InGaN | — | — | 1 | 0 | — | Compound, Nitride | |
| Indium oxyhydroxide | InOOH | — | — | 4 | 0 | — | Hydroxide , Compound | |
| Indium phosphide | InP | — | — | 1 | 2 | SXES | Compound | |
| Insizwaite | PtBi2 | Pyrite (group) | — | 0 | 0 | — | Mineral | |
| Iodargyrite | AgI | — | — | 1 | 0 | — | Mineral, Halide | |
| Iodine | I | — | — | 9 | 0 | — | Element |
