| Group | Description - click for subdivisions |
|---|
| 1 | NATIVE ELEMENTS AND ALLOYS |
| 2 | SULFIDES |
| 3 | SULFOSALTS |
| 4 | SIMPLE OXIDES |
| 5 | OXIDES CONTAINING URANIUM OR THORIUM |
| 6 | HYDROXIDES AND OXIDES CONTAINING HYDROXYL |
| 7 | MULTIPLE OXIDES |
| 8 | MULTIPLE OXIDES CONTAINING NIOBIUM,TANTALUM OR TITANIUM |
| 9 | NORMAL HALIDES |
| 10 | OXYHALIDES AND HYDROXYHALIDES |
| 11 | HALIDE COMPLEXES |
| 12 | COMPOUND HALIDES |
| 13 | ACID CARBONATES |
| 14 | ANHYDROUS NORMAL CARBONATES |
| 15 | HYDRATED NORMAL CARBONATES |
| 16a | ANHYDROUS CARBONATES CONTAINING HYDROXYL OR HALOGEN |
| 16b | HYDRATED CARBONATES CONTAINING HYDROXYL OR HALOGEN |
| 17 | COMPOUND CARBONATES |
| 18 | NORMAL NITRATES |
| 19 | NITRATES CONTAINING HYDROXYL OR HALOGEN |
| 20 | COMPOUND NITRATES |
| 21 | NORMAL IODATES |
| 22 | IODATES CONTAINING HYDROXYL OR HALOGEN |
| 23 | COMPOUND IODATES |
| 24 | ANHYDROUS BORATES |
| 25 | ANHYDROUS BORATES CONTAINING HYDROXYL OR HALOGEN |
| 26 | HYDRATED BORATES CONTAINING HYDROXYL OR HALOGEN |
| 27 | COMPOUND BORATES |
| 28 | ANHYDROUS ACID AND NORMAL SULFATES |
| 29 | HYDRATED ACID AND NORMAL SULFATES |
| 30 | ANHYDROUS SULFATES CONTAINING HYDROXYL OR HALOGEN |
| 31 | HYDRATED SULFATES CONTAINING HYDROXYL OR HALOGEN |
| 32 | COMPOUND SULFATES |
| 33 | SELENATES AND TELLURATES |
| 34 | SELENITES, TELLURITES AND SULFITES |
| 35 | ANHYDROUS CHROMATES |
| 36 | COMPOUND CHROMATES |
| 37 | ANHYDROUS ACID PHOSPHATES, ARSENATES AND VANADATES |
| 38 | ANHYDROUS NORMAL PHOSPHATES, ARSENATES, AND VANADATES |
| 39 | HYDRATED ACID PHOSPHATES,ARSENATES AND VANADATES |
| 40 | HYDRATED NORMAL PHOSPHATES,ARSENATES AND VANADATES |
| 41 | ANHYDROUS PHOSPHATES, ETC.CONTAINING HYDROXYL OR HALOGEN |
| 42 | HYDRATED PHOSPHATES, ETC.CONTAINING HYDROXYL OR HALOGEN |
| 43 | COMPOUND PHOSPHATES, ETC. |
| 44 | ANTIMONATES |
| 45 | ACID AND NORMAL ANTIMONITES AND ARSENITES |
| 46 | ANTIMONITES AND ARSENITES CONTAINING HYDROXYL OR HALOGEN |
| 47 | VANADIUM OXYSALTS |
| 48 | ANHYDROUS MOLYBDATES AND TUNGSTATES |
| 49 | HYDRATED MOLYBDATES AND TUNGSTATES |
| 50 | ORGANIC COMPOUNDS |
| 51 | NESOSILICATES Insular SiO4 Groups Only |
| 52 | NESOSILICATES Insular SiO4 Groups and O,OH,F,H2O |
| 53 | NESOSILICATES Insular SiO4 Groups and Other Anions or Complex Cations |
| 54 | NESOSILICATES Borosilicates and Some Beryllosilicates |
| 55 | SOROSILICATES Si2O7 Groups,Generally with no Additional Anions |
| 56 | SOROSILICATES Si2O7 Groups, With Additional O, OH, F and H2O |
| 57 | SOROSILICATES Si3O10 Groups and Larger Noncyclic Groups |
| 58 | SOROSILICATES Insular, Mixed, Single, and Larger Tetrahedral Groups |
| 59 | CYCLOSILICATES Three-Membered Rings |
| 60 | CYCLOSILICATES Four-Membered Rings |
| 61 | CYCLOSILICATES Six-Membered Rings |
| 62 | CYCLOSILICATES Eight-Membered Rings |
| 63 | CYCLOSILICATES Condensed Rings |
| 64 | CYCLOSILICATES Rings with Other Anions and Insular Silicate Groups |
| 65 | INOSILICATES Single-Width,Unbranched Chains,(W=1) |
| 66 | INOSILICATES Double-Width,Unbranched Chains,(W=2) |
| 67 | INOSILICATES Unbranched Chains with W > 2 |
| 68 | INOSILICATES Structures with Chains of More Than One Width |
| 69 | INOSILICATES Chains with Side Branches or Loops |
| 70 | INOSILICATES Column or Tube Structures |
| 71 | PHYLLOSILICATES Sheets of Six-Membered Rings |
| 72 | PHYLLOSILICATES Two-Dimensional Infinite Sheets with Other Than Six-Membered Rings |
| 73 | PHYLLOSILICATES Condensed Tetrahedral Sheets |
| 74 | PHYLLOSILICATES Modulated Layers |
| 75 | TECTOSILICATES Si Tetrahedral Frameworks |
| 76 | TECTOSILICATES Al-Si Framework |
| 77 | TECTOSILICATES Zeolites |
| 78 | Unclassified Silicates |