Material Index
| Name | Formula | Classifications | Members | Image | Specimens | Lines | Spectra | Techniques | Tags |
|---|---|---|---|---|---|---|---|---|---|
| Ice | H2O | Minerals containing H2O | — | 0 | 8 | 0 | IR, PL | Mineral, Simple oxide | |
| Iceland spar | CaCO3 | Calcite | — | 0 | 3 | 3 | PL/Laser | Carbonate , Variety | |
| Iddingsite | — | — | — | 1 | 0 | 0 | — | Rock type | |
| Idrialite | C22H14 | — | — | 0 | 7 | 0 | PL | Mineral, Organic | |
| Illite-1Md | K0.65Al2.0[Al0.65Si3.35O10](OH)2 | Illite | — | 1 | 0 | 0 | — | Hydroxide , Aluminosilicate , Polytype | |
| Illite-Smectite 11.5A | K0.65Al2.0[Al0.65Si3.35O10](OH)2 ‒ A0.3D2-3[T4O10]Z2 · nH2O | Mica, Smectite (group) | — | 1 | 0 | 0 | — | Aluminosilicate | |
| Illite-Smectite 12.0A | K0.65Al2.0[Al0.65Si3.35O10](OH)2 ‒ A0.3D2-3[T4O10]Z2 · nH2O | Mica, Smectite (group) | — | 2 | 0 | 0 | — | Aluminosilicate | |
| Ilmenite | FeIITiIVO3, FeTiO3, (Fe,Mn)TiO3 | — | — | 10 | 0 | 5 | EDS | Mineral, Titanate | |
| Inderborite | CaMg[B3O3(OH)5]2·6H2O | Minerals containing OH, Minerals containing H2O | — | 0 | 1 | 0 | PL | Hydroxide , Mineral, Hydrated , Borate | |
| Indium gallium nitride | InGaN | — | — | 0 | 1 | 0 | CL/SEM | Compound, Nitride | |
| Indium oxyhydroxide | InOOH | — | — | 0 | 4 | 0 | IR | Hydroxide , Compound | |
| Indium phosphide | InP | — | — | 1 | 1 | 2 | SXES | Compound | |
| Inyoite | CaB3O3(OH)5·4H2O | Minerals containing OH, Minerals containing H2O | — | 0 | 1 | 0 | PL | Hydroxide , Mineral, Hydrated , Borate | |
| Iodargyrite | AgI | — | — | 0 | 1 | 0 | IR | Mineral, Halide | |
| Iridium | Ir | — | — | 1 | 15 | 2 | SXES | Mineral , Metal , Element |
