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Strunz Classification System
IV - Oxides
| Mineral | Formula | Classification |
| A - Oxides with Me:O = 1:1 and 2:1 (M2O,MO) | ||
| Series 1 - Ice | ||
| Ice | H2O | IV / A.1-10 |
| B - Oxides with Me:O = 3:4 (spinel type M3O4 and related) | ||
| Series 1 - Spinel group, spinel - gahnite series | ||
| Hercynite | Fe2+Al2O4 | IV / B.1-16 |
| Series 2 - Spinel group, magnesioferrite - franklinite series | ||
| Magnetite | Fe2+Fe23+O4 | IV / B.2-16 |
| C - Oxides with Me:O = 2:3 (M2O3 and related compounds) | ||
| Series 4 - Hematite group | ||
| Corundum | Al2O3 | IV / C.4-10 |
| Hematite | Fe2O3 | IV / C.4-16 |
| Series 5 - Ilmenite group, geikilite - brizziite series | ||
| Ilmenite | Fe2+TiO3 | IV / C.5-16 |
| Pyrophanite | MnTiO3 | IV / C.5-30 |
| Series 9 - Crichtonite group | ||
| Senaite | PbMnFe23+(Ti,Fe3+)18O38 | IV / C.9-60 |
| Series 10 - Perovskite series | ||
| Loparite-(Ce) | (Ce,Na,Ca)2(Ti,Nb)2O6 | IV / C.10-50 |
| Lueshite | NaNbO3 | IV / C.10-60 |
| Series 17 - Pyrochlore group, pyrochlore series with Nb > Ti | ||
| Pyrochlore | (Na,Ca)2Nb2O6(OH,F) | IV / C.17-16 |
| D - Oxides with Me:O = 2:3 (M2O3 and related compounds) | ||
| Series 1 - Quartz group | ||
| Quartz | SiO2 | IV / D.1-10 |
| Opal | SiO2 · n H2O | IV / D.1-80 |
| Series 2 - Rutile group, rutile - cassiterite - plattnerite series | ||
| Rutile | TiO2 | IV / D.2-10 |
| Series 3 - Rutile group, ilmenorutile - Struverite series | ||
| Ilmenorutile | (Ti,Nb,Fe3+)3O6 | IV / D.3-10 |
| Series 6 - Tapiolite group | ||
| Franconite | Na2Nb4O11 · 9H2O | IV / D.6-40 |
| Hochelagaite | (Ca,Na,Sr)Nb4O11 · 8H2O | IV / D.6-50 |
| Series 8 - Cryptomelane group | ||
| Cryptomelane | K(Mn4+,Mn2+)8O16 | IV / D.8-20 |
| Series 12 - Rancieite - takanelite series | ||
| Ranciéite | (Ca,Mn)Mn44+O9 · 3 H2O | IV / D.12-10 |
| Series 14 - Anatase - downeyite series | ||
| Anatase | TiO2 | IV / D.14-10 |
| Series 15 - Brookite - kuranakhite series | ||
| Brookite | TiO2 | IV / D.15-10 |
| Series 18 - Columbite series | ||
| Manganocolumbite | (Mn,Fe++)(Nb,Ta)2O6 | IV / D.18-20 |
| Ferrocolumbite | Fe2+Nb2O6 | IV / D.18-30 |
| F - Hydroxides and oxidic hydrates | ||
| Series 1 - Sassolite - clinobehoite series | ||
| Behoite | Be(OH)2 | IV / F.1-16 |
| Series 2 - Gibbsite - doyleite series | ||
| Gibbsite | Al(OH)3 | IV / F.2-10 |
| Nordstrandite | Al(OH)3 | IV / F.2-30 |
| Doyleite | Al(OH)3 | IV / F.2-40 |
| Series 3 - Brucite series | ||
| Spertiniite | Cu(OH)2 | IV / F.3-90 |
| Series 6 - Diaspore - goethite - faitknechtite series | ||
| Goethite | alpha-Fe3+O(OH) | IV / F.6-30 |
| Lepidocrocite | gamma-Fe3+O(OH) | IV / F.6-40 |
| Series 11 - Cyanophillite - cualstibite series | ||
| Birnessite | Na4Mn14O27 · 9H2O | IV / F.11-30 |
Strunz Classification System I - II - III - IV - V - VI - VII - VIII/A - VIII/B - VIII/C - VIII/D - VIII/E - VIII/F - VIII/G - VIII/H - VIII/J - SW | ||