| 1 | ELEMENTOS (Metales and aleacciones intermetálicas; metaloides and no metales; carbures, siliciuros, nitruros, fosfuros) |
| 2 | SULFUROS y SULFOSALES (sulfuros, selenuros, teleruros; arseniuros, antimoniuros, bismutidos; sulfoarsenitos, sulfoantimonitos, sulfbismutitos, etc.) |
| 3 | HALUROS |
| 4 | OXIDOS (Hydroxides, V[5,6] vanadatos, arsenitos, antimonitos, bismuthitos, sulfitos, selenitos, telluritos, iodatos) |
| 5 | CARBONATOS (NITRATOS) |
| 6 | BORATOS |
| 7 | SULFATOS (selenatos, teluratos, cromatos, molibdatos, wolframatos) |
| 8 | FOSPHATOS, ARSENATES, VANADATES |
| 9 | SILICATOS (Germanatos) |
| 10 | COMPUESTOS ORGÁNICOS |
This classification is based on the Nickel-Strunz 9th Edition (2001), expanded on by Jim Ferraiolo and others, and now extended and maintained by mindat.org
| 7.A | Sulfates (selenates, etc.) without additional anions, without H2O |
| 7.B | Sulfates (selenates, etc.) with additional anions, without H2O |
| 7.C | Sulfates (selenates, etc.) without additional anions, with H2O |
| 7.D | Sulfates (selenates, etc.) with additional anions, with H2O |
| 7.E | Uranyl sulfates |
| 7.F | Chromates |
| 7.G | Molybdates, Wolframates and Niobates |
| 7.H | Uranium and uranyl molybdates and wolframates |
| 7.J | Thiosulfates |
7.A Sulfates (selenates, etc.) without additional anions, without H2O
| 7.AA | With small cations |
| 7.AB | With medium-sized cations |
| 7.AC | With medium-sized and large cations |
| 7.AD | With only large cations |
7.AD With only large cations
7.AD.35 BARITA BaSO4
7.AD.35 CELESTINA SrSO4
7.B Sulfates (selenates, etc.) with additional anions, without H2O
| 7.BA | With small cations |
| 7.BB | With medium-sized cations |
| 7.BC | With medium-sized and large cations |
| 7.BD | With only large cations |
7.BB With medium-sized cations
7.BB.25 Brocantita Cu4(SO4)(OH)6
7.BD With only large cations
7.BD.30 HANKSITA Na22K(SO4)9(CO3)2Cl
7.C Sulfates (selenates, etc.) without additional anions, with H2O
| 7.CA | With small cations |
| 7.CB | With only medium-sized cations |
| 7.CC | With medium-sized and large cations |
| 7.CD | With only large cations |
7.CB With only medium-sized cations
7.CB.35 MELANTERITA Fe2+(H2O)6SO4 · H2O
7.CD With only large cations
7.CD.40 SELENITA CaSO4 · 2H2O
7.CD.40 YESO CaSO4 · 2H2O
7. D Sulfates (selenates, etc.) with additional anions, with H2O
| 7.DA | With small cations |
| 7.DB | With only medium-sized cations; insular octahedra and finite units |
| 7.DC | With only medium-sized cations; chains of edge-sharing octahedra |
| 7.DD | With only medium-sized cations; sheets of edge-sharing octahedra |
| 7.DE | With only medium-sized cations; unclassified |
| 7.DF | With large and medium-sized cations |
| 7.DG | With large and medium-sized cations; with NO3, CO3, B(OH)4, SiO4 or IO3 |
7.DD With only medium-sized cations; sheets of edge-sharing octahedra
7.DD.30 DEVILLINA CaCu4(SO4)2(OH)6 · 3H2O
7.DE With only medium-sized cations; unclassified
7.DE.10 CIANOTRIQUITA Cu4Al2(SO4)(OH)12 · 2H2O
7.G Molybdates, Wolframates and Niobates
7.GA.O5 SCHEELITA Ca(WO4)
7.GA.05 Wulfenita: PbMoO4
7.GB With additional anions and/or H2O
7.GB.05 LINDGRENITA Cu3(Mo6+O4)2(OH)2