Material Index
| Name | Formula | Classifications | Members | Image | Lines | Spectra | Techniques | Tags |
|---|---|---|---|---|---|---|---|---|
| Tectosilicate | [AlxSiyO(2x+2y)]x- | — | — | 4 | 0 | — | Group | |
| Tellurite | TeO2 | — | — | 0 | 0 | — | Mineral, Simple oxide | |
| Tellurium | Te | — | — | 11 | 2 | SXES | Metal , Mineral , Element | |
| 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 |
