Material Index
| Name | Formula | Classifications | Members | Image | Lines | Spectra | Techniques | Tags |
|---|---|---|---|---|---|---|---|---|
| Tephroite | MnII2(SiO4) | Olivine | — | 0 | 0 | — | Mineral, Silicate | |
| Terbium | Tb | — | — | 12 | 0 | — | Element , Metal | |
| Terbium aluminium garnet | Tb3Al5O12 | — | — | 3 | 0 | — | Compound, Synthetic | |
| Terbium orthophosphate | TbPO4 | REE phosphate | — | 0 | 0 | — | Compound, Orthophosphate , Phosphate | |
| Terbium ultraphosphate | TbP5O14 | REE ultraphosphate | — | 18 | 2 | CL/SEM, SXES | Synthetic , Compound, Phosphate , Ultraphosphate | |
| Tetraferriannite | KFeII3(Si3FeIII)O10(OH)2 | Biotite | — | 0 | 0 | — | Mineral, Hydroxide , Silicate | |
| Tetraferriphlogopite | KMg3(Si3FeIII)O10(OH)2 | Biotite | — | 0 | 0 | — | Mineral, Hydroxide , Silicate | |
| Tetrarooseveltite | Bi(AsO4) | — | — | 0 | 0 | — | Arsenate , Mineral | |
| Thallium | Tl | — | — | 15 | 0 | — | Metal , Element | |
| Thallium bromide / iodide | Tl(Br,I) | — | — | 3 | 2 | SXES | Synthetic , Compound, Halide | |
| Thenardite | Na2SO4 | Sodium sulphate | — | 2 | 0 | — | Sulphate | |
| Theophrastite | Ni(OH)2 | Brucite (group) | — | 0 | 0 | — | Mineral, Hydroxide | |
| Thermaerogenite | CuAl2O4 | Spinel (subgroup) | — | 0 | 0 | — | Mineral | |
| Thorbastnäsite | ThCa(CO3)2F2·3H2O | Bastnäsite (group) | — | 0 | 0 | — | Hydrated , Mineral, Carbonate , Halide | |
| Thorianite | ThO2 | Thorium dioxide, Uraninite (group) | — | 4 | 4 | CL/SEM, SXES | Mineral, Simple oxide |
