Oxide mineral#Class: hydroxides

• XO form
• Periclase group
• Periclase {{chem2|MgO}}
• Manganosite {{chem2|MnO}}
• Zincite group
• Zincite {{chem2|ZnO}}
• Bromellite {{chem2|BeO}}
• Tenorite {{chem2|CuO}}
• Litharge {{chem2|PbO}}

• {{chem2|X2O}} form
• Cuprite {{chem2|Cu2O}}
• Ice {{chem2|H2O}}

• {{chem2|X2O3}} form
• Hematite group
• Corundum {{chem2|Al2O3}}
• Hematite {{chem2|Fe2O3}}
• Ilmenite {{chem2|FeTiO3}}

• {{chem2|XO2}} form
• Rutile group
• Rutile {{chem2|TiO2}}
• Pyrolusite {{chem2|MnO2}}
• Cassiterite {{chem2|SnO2}}
• Baddeleyite {{chem2|ZrO2}}
• Uraninite {{chem2|UO2}}
• Thorianite {{chem2|ThO2}}

• {{chem2|XY2O4}} form
• Spinel group
• Spinel {{chem2|MgAl2O4}}
• Gahnite {{chem2|ZnAl2O4}}
• Magnetite {{chem2|Fe3O4 (Fe^{2+}Fe^{3+}2O4)}}
• Franklinite {{chem2|(Zn,Fe,Mn)(Fe,Mn)2O4}}
• Chromite {{chem2|FeCr2O4}}
• Chrysoberyl {{chem2|BeAl2O4}}
• Columbite {{chem2|(Fe,Mn)(Nb,Ta)2O6}}

• Hydroxide subgroup:
• Brucite {{chem2|Mg(OH)2}}
• Manganite {{chem2|MnO(OH)}}
• Romanèchite {{chem2|BaMn^{2+}Mn^{4+}8O16(OH)4}}
• Goethite group:
• Diaspore {{chem2|αAlO(OH)}}
• Goethite {{chem2|αFeO(OH)}}

IMA-CNMNC proposes a new hierarchical scheme (Mills et al., 2009). This list uses it to modify the Nickel–Strunz classification (mindat.org, 10 ed, pending publication).{{original research?|date=May 2025}}

• Abbreviations:
• "*": discredited (IMA/CNMNC status)
• "?": questionable/doubtful (IMA/CNMNC status)
• "REE": Rare-earth element (Sc, Y, La, Ce, Pr, Nd, Pm, Sm, Eu, Gd, Tb, Dy, Ho, Er, Tm, Yb, Lu)
• "PGE": Platinum-group element (Ru, Rh, Pd, Os, Ir, Pt)
• 03.C Aluminofluorides, 06 Borates, 08 Vanadates (04.H V^[5,6] Vanadates), 09 Silicates:
• Neso: insular (from {{Langx|el|νησος|translit=nēsos|lit=island}})
• Soro: grouping (from {{Langx|el|σωροῦ|links=no|translit=sōros}}; heap, mound (especially of corn))
• Cyclo: ring
• Ino: chain (from {{Langx|el|ις|links=no}} [genitive: {{Langx|el|ινος|translit=inos|label=none}}], fibre)
• Phyllo: sheet (from {{Langx|el|φύλλον|links=no|translit=phyllon|lit=leaf}})
• Tekto: three-dimensional framework
• Nickel–Strunz code scheme: NN.XY.##x
• NN: Nickel–Strunz mineral class number
• X: Nickel–Strunz mineral division letter
• Y: Nickel–Strunz mineral family letter
• ##x: Nickel–Strunz mineral/group number, x add-on letter

• 04.A Metal:Oxygen = 2.1 and 1:1
• 04.AA Cation:Anion (M:O) = 2:1 (and 1.8:1): 05 Ice, 10 Cuprite, 15 Paramelaconite
• 04.AB M:O = 1:1 (and up to 1:1.25); with small to medium-sized cations only: 05 Crednerite, 10 Tenorite; 15 Delafossite, 15 Mcconnellite; 20 Bromellite, 20 Zincite; 25 Lime, 25 Bunsenite, 25 Monteponite, 25 Manganosite, 25 Periclase, 25 Wüstite
• 04.AC M:O = 1:1 (and up to 1:1.25); with large cations (± smaller ones): 05 Swedenborgite; 10 Brownmillerite, 10 Srebrodolskite; 15 Montroydite, 20 Litharge, 20 Romarchite, 25 Massicot
• 04.B Metal:Oxygen = 3:4 and similar
• 04.BA With small and medium-sized cations: 05 Chrysoberyl, 10 Manganostibite
• 04.BB With only medium-sized cations: 05 Filipstadite, 05 Donathite?, 05 Gahnite, 05 Galaxite, 05 Hercynite, 05 Spinel, 05 Cochromite, 05 Chromite, 05 Magnesiochromite, 05 Manganochromite, 05 Nichromite, 05 Zincochromite, 05 Magnetite, 05 Cuprospinel, 05 Franklinite, 05 Jacobsite, 05 Magnesioferrite, 05 Trevorite, 05 Brunogeierite, 05 Coulsonite, 05 Magnesiocoulsonite, 05 Qandilite, 05 Ulvospinel, 05 Vuorelainenite; 10 Hydrohetaerolite, 10 Hausmannite, 10 Iwakiite, 10 Hetaerolite; 15 Maghemite, 20 Tegengrenite, 25 Xieite
• 04.BC With medium-sized and large cations: 05 Marokite, 10 Dmitryivanovite
• 04.BD With only large cations: 05 Minium
• 04.C Metal:Oxygen = 2:3, 3:5, and Similar
• 04.CB With medium-sized cations: 05 Tistarite, 05 Auroantimonate*, 05 Brizziite-VII, 05 Brizziite-III, 05 Corundum, 05 Eskolaite, 05 Hematite, 05 Karelianite, 05 Geikielite, 05 Ecandrewsite, 05 Ilmenite, 05 Pyrophanite, 05 Melanostibite, 05 Romanite*; 10 Bixbyite, 10 Avicennite; 15 Armalcolite, 15 Mongshanite*, 15 Pseudobrookite; 20 Magnesiohogbomite-6N6S, 20 Magnesiohogbomite-2N3S, 20 Magnesiohogbomite-2N2S, 20 Zincohogbomite-2N2S, 20 Ferrohogbomite-2N2S; 25 Pseudorutile, 25 Ilmenorutile; 30 Oxyvanite, 30 Berdesinskiite; 35 Olkhonskite, 35 Schreyerite; 40 Kamiokite, 40 Nolanite, 40 Rinmanite; 45 Stibioclaudetite, 45 Claudetite; 50 Arsenolite, 50 Senarmontite; 55 Valentinite, 60 Bismite, 65 Sphaerobismoite, 70 Sillenite, 75 Kyzylkumite
• 04.CC With large and medium-sized cations: 05 Chrombismite, 10 Freudenbergite, 15 Grossite, 20 Mayenite, 25 Yafsoanite; 30 Barioperovskite, 30 Lakargiite, 30 Natroniobite, 30 Latrappite, 30 Lueshite, 30 Perovskite; 35 Macedonite, 35 Isolueshite, 35 Loparite-(Ce), 35 Tausonite; 40 Crichtonite, 40 Dessauite, 40 Davidite-(Ce), 40 Davidite-(La), 40 Mathiasite, 40 Lindsleyite, 40 Landauite, 40 Loveringite, 40 Loveringite, 40 Cleusonite, 40 Gramaccioliite-(Y); 45 Hawthorneite, 45 Magnetoplumbite, 45 Haggertyite, 45 Batiferrite, 45 Hibonite, 45 Nezilovite, 45 Yimengite, 45 Diaoyudaoite, 45 Lindqvistite, 45 Plumboferrite; 50 Jeppeite, 55 Zenzenite, 60 Mengxianminite*
• 04.D Metal:Oxygen = 1:2 and similar
• 04.DA With small cations
• (moved to -09- Subclass: tektosilicates)
• 04.DB With medium-sized cations; chains of edge-sharing octahedra: 05 Tripuhyite, 05 Tugarinovite, 05 Varlamoffite*, 05 Argutite, 05 Cassiterite, 05 Rutile, 05 Pyrolusite, 05 Plattnerite, 05 Squawcreekite?; 10 Bystromite, 10 Ordonezite, 10 Tapiolite-(Fe), 10 Tapiolite-(Mn), 10 Tapiolite*, 15a Paramontroseite, 15a Ramsdellite, 15b Akhtenskite, 15c Nsutite; 20 Scrutinyite; 25 Ixiolite, 25 Ishikawaite, 25 Srilankite, 25 Samarskite-(Y), 25 Samarskite-(Yb), 25 Yttrocolumbite-(Y); 30 Heftetjernite, 30 Wolframoixiolite*, 30 Krasnoselskite*, 30 Ferberite, 30 Hubnerite, 30 Sanmartinite, 30 Wolframite*; 35 Tantalite-(Mg), 35 Tantalite-(Fe), 35 Tantalite-(Mn), 35 Columbite-(Mg), 35 Columbite-(Fe), 35 Columbite-(Mn), 35 Qitianlingite; 40 Ferrowodginite, 40 Lithiotantite, 40 Lithiowodginite, 40 Tantalowodginite*, 40 Titanowodginite, 40 Wodginite, 40 Ferrotitanowodginite; 45 Tivanite, 50 Carmichaelite, 55 Alumotantite, 60 Biehlite
• 04.DC With medium-sized cations; sheets of edge-sharing octahedra: 05 Bahianite, 10 Simpsonite
• 04.DD With medium-sized cations; frameworks of edge-sharing octahedra: 05 Anatase, 10 Brookite
• 04.DE With medium-sized cations; with various polyhedra: 05 Downeyite, 10 Koragoite; 15 Koechlinite, 15 Russellite, 15 Tungstibite; 20 Tellurite, 25 Paratellurite; 30 Cervantite, 30 Bismutotantalite, 30 Bismutocolumbite, 30 Clinocervantite, 30 Stibiocolumbite, 30 Stibiotantalite; 35 IMA2007-058, 35 Baddeleyite
• 04.DF With large (± medium-sized) cations; dimers and trimers of edge-sharing octahedra: 05 Nioboaeschynite-(Y), 05 Aeschynite-(Ce), 05 Aeschynite-(Nd), 05 Aeschynite-(Y), 05 Nioboaeschynite-(Ce), 05 Nioboaeschynite-(Nd), 05 Tantalaeschynite-(Y), 05 Rynersonite, 05 Vigezzite, 10 Changbaiite, 15 Murataite
• 04.DG With large (± medium-sized) cations; chains of edge-sharing octahedra: 05 Euxenite-(Y), 05 Loranskite-(Y), 05 Polycrase-(Y), 05 Uranopolycrase, 05 Fersmite, 05 Kobeite-(Y), 05 Tanteuxenite-(Y), 05 Yttrocrasite-(Y); 10 Fergusonite-beta-(Nd), 10 Fergusonite-beta-(Y), 10 Fergusonite-beta-(Ce), 10 Yttrotantalite-(Y); 15 Foordite, 15 Thoreaulite; 20 Raspite
• 04.DH With large (± medium-sized) cations; sheets of edge-sharing octahedra:
• IMA/CNMNC revised the Pyrochlore supergroup 2010 (04.DH.15 and 04.DH.20)
• 05 Brannerite, 05 Orthobrannerite, 05 Thorutite; 10 Kassite, 10 Lucasite-(Ce)
• Pyrochlore group: Fluorcalciopyrochlore, Fluorkenopyrochlore, Fluornatropyrochlore, Fluorstrontiopyrochlore, Hydropyrochlore, Hydroxycalciopyrochlore, Kenoplumbopyrochlore, Oxycalciopyrochlore, Oxynatropyrochlore, Oxyplumbopyrochlore, Oxyyttropyrochlore-(Y)
• Microlite group: Fluorcalciomicrolite, Fluornatromicrolite, Hydrokenomicrolite, Hydromicrolite, Hydroxykenomicrolite, Kenoplumbomicrolite, Oxycalciomicrolite, Oxystannomicrolite, Oxystibiomicrolite
• Romeite group: Cuproromeite, Fluorcalcioromeite, Fluornatroromeite, Hydroxycalcioromeite, Oxycalcioromeite, Oxyplumboromeite, Stibiconite
• Betafite group: Calciobetafite, Oxyuranobetafite
• Elsmoreite group: Hydrokenoelsmoreite
• 25 Rosiaite; 30 Zirconolite-3O, 30 Zirconolite-3T, 30 Zirconolite-2M, 30 Zirconolite; 35 Liandratite, 35 Petscheckite; 40 Ingersonite, 45 Pittongite
• Discredited minerals 04.DH.15: Bariomicrolite (of Hogarth 1977), Bariopyrochlore (of Hogarth 1977), Betafite (of Hogarth 1977), Bismutomicrolite (of Hogarth 1977), Ceriopyrochlore (of Hogarth 1977), Jixianite, Natrobistantite, Plumbomicrolite (of Hogarth 1977), Plumbobetafite (of Hogarth 1977), Stannomicrolite (of Hogarth 1977), Stibiobetafite (of Černý et al.), Yttrobetafite (of Hogarth 1977), Yttropyrochlore (of Hogarth 1977), Bismutopyrochlore (of Chukanov et al.) and Bismutostibiconite 04.DH.20
• 04.DJ With large (± medium-sized) cations; polyhedral frameworks: 05 Calciotantite, 05 Irtyshite, 05 Natrotantite
• 04.DK With large (± medium-sized) cations; tunnel structures: 05 Ankangite, 05 Coronadite, 05 Hollandite, 05 Manjiroite, 05 Mannardite, 05 Redledgeite, 05 Priderite, 05 Henrymeyerite, 05 Akaganeite, 10 Cryptomelane, 10 Romanechite, 10 Strontiomelane, 10 Todorokite
• 04.DL With large (± medium-sized) cations; fluorite-type structures: 05 Cerianite-(Ce), 05 Zirkelite, 05 Thorianite, 05 Uraninite; 10 Calzirtite, 10 Hiarneite, 10 Tazheranite
• 04.DM With large (± medium-sized) cations; unclassified: 05 Sosedkoite, 05 Rankamaite; 15 Cesplumtantite, 20 Eyselite, 25 Kuranakhite
• 04.E Metal:Oxygen = < 1:2
• 04.E: IMA2008-040
• 04.EA Oxides with metal : oxygen < 1:2 (M₂O₅, MO₃): 05 Tantite, 10 Krasnogorite*, 10 Molybdite
• 04.X Unclassified Strunz Oxides
• 04.XX Unknown: 00 Allendeite, 00 Ashanite?, 00 Hongquiite*, 00 Psilomelane?, 00 Uhligite?, 00 Clinobirnessite*, 00 Kleberite*, 00 Chubutite*, 00 Struverite?, 00 IMA2000-016, 00 IMA2000-026

• 04.F Hydroxides (without V or U)
• 04.FA Hydroxides with OH, without H₂O; corner-sharing tetrahedra: 05a Behoite, 05b Clinobehoite; 10 Sweetite, 10 Wulfingite, 10 Ashoverite
• 04.FB Hydroxides with OH, without H₂O; insular octahedra: 05 Shakhovite; 10 Cualstibite, 10 Zincalstibite
• 04.FC Hydroxides with OH, without H₂O; corner-sharing octahedra: 05 Dzhalindite, 05 Sohngeite, 05 Bernalite; 10 Burtite, 10 Mushistonite, 10 Natanite, 10 Vismirnovite, 10 Schoenfliesite, 10 Wickmanite; 15 Jeanbandyite, 15 Mopungite, 15 Stottite; 15 Tetrawickmanite; 20 Ferronigerite-6N6S, 20 Ferronigerite-2N1S, 20 Magnesionigerite-6N6S, 20 Magnesionigerite-2N1S; 25 Magnesiotaaffeite-6N3S, 25 Magnesiotaaffeite-2N2S, 25 Ferrotaaffeite-6N3S
• 04.FD Hydroxides with OH, without H₂O; chains of edge-sharing octahedra: 05 Spertiniite; 10 Bracewellite, 10 Diaspore, 10 Guyanaite, 10 Groutite, 10 Goethite, 10 Montroseite, 10 Tsumgallite; 15 Manganitev; 20 Cerotungstite-(Ce), 20 Yttrotungstite-(Y), 20 Yttrotungstite-(Ce); 25 Frankhawthorneite; 30 Khinite, 30 Parakhinite
• 04.FE Hydroxides with OH, without H₂O; sheets of edge-sharing octahedra: 05 Amakinite, 05 Brucite, 05 Portlandite, 05 Pyrochroite, 05 Theophrastite, 05 Fougerite; 10 Bayerite, 10 Doyleite, 10 Gibbsite, 10 Nordstrandite; 15 Boehmite, 15 Lepidocrocite; 20 Grimaldiite, 20 Heterogenite-2H, 20 Heterogenite-3R; 25 Feitknechtite, 25 Lithiophorite; 30 Quenselite, 35 Ferrihydrite; 40 Feroxyhyte, 40 Vernadite; 45 Quetzalcoatlite
• 04.FF Hydroxides with OH, without H₂O; various polyhedra: 05 Hydroromarchite
• 04.FG Hydroxides with OH, without H₂O; unclassified: 05 Janggunite, 10 Cesarolite, 15 Kimrobinsonite
• 04.FH Hydroxides with H₂O ± (OH); insular octahedra: 05 Bottinoite, 05 Brandholzite
• 04.FJ Hydroxides with H₂O ± (OH); corner-sharing octahedra: 05 Sidwillite, 05 Meymacite; 10 Tungstite; 15 Ilsemannite, 15 Hydrotungstite; 20 Parabariomicrolite
• 04.FK Hydroxides with H₂O ± (OH); chains of edge-sharing octahedra: 05 Bamfordite
• 04.FL Hydroxides with H₂O ± (OH); sheets of edge-sharing octahedra: 05 Meixnerite, 05 Jamborite, 05 Iowaite, 05 Woodallite, 05 Akdalaite, 05 Muskoxite; 10 Hydrocalumite, 15 Kuzelite; 20 Aurorite, 20 Chalcophanite, 20 Ernienickelite, 20 Jianshuiite; 25 Woodruffite, 30 Asbolane; 40 Takanelite, 40 Rancieite; 45 Birnessite, 55 Cianciulliite, 60 Jensenite, 65 Leisingite, 75 Cafetite, 80 Mourite, 85 Deloryite
• 04.FM Hydroxides with H₂O ± (OH); Unclassified: 15 Franconite, 15 Hochelagaite, 15 Ternovite; 25 Belyankinite, 25 Gerasimovskite, 25 Manganbelyankinite; 30 Silhydrite, 35 Cuzticite, 40 Cyanophyllite
• 04.FN: 05 Menezesite
• 04.G Uranyl Hydroxides
• 04.GA Without additional cations: IMA2008-022; 05 Metaschoepite, 05 Paraschoepite, 05 Schoepite; 10 Ianthinite; 15 Metastudtite, 15 Studtite
• 04.GB With additional cations (K, Ca, Ba, Pb, etc.); with mainly UO₂(O,OH)₅ pentagonal polyhedra: 05 Compreignacite, 05 Agrinierite, 05 Rameauite; 10 Billietite, 10 Becquerelite, 10 Protasite; 15 Richetite; 20 Calciouranoite, 20 Bauranoite, 20 Metacalciouranoite; 25 Fourmarierite, 30 Wolsendorfite, 35 Masuyite; 40 Metavandendriesscheite, 40 Vandendriesscheite; 45 Vandenbrandeite, 50 Sayrite, 55 Curite, 60 Iriginite, 65 Uranosphaerite, 70 Holfertite
• 04.GC With additional cations; with UO₂(O,OH)₆ hexagonal polyhedra: 05 Clarkeite, 10 Umohoite, 15 Spriggite
• 04.H V^[5,6] Vanadates
• (moved to -08- Class: vanadates)
• 04.I Ice group
• 04.X Unclassified Strunz Oxides (Hydroxides)
• 04.XX Unknown: 00 Ungursaite*, 00 Scheteligite?

{{Reflist}}

{{Refbegin}}

• Palache, Charles, Harry Berman and Clifford Frondel, 1944, The System of Mineralogy, Wiley, 7th ed. Vol. 1, p. 490 ff.
• Klein, Cornelis and Cornelius S. Hurlbut, Jr., 1985, Manual of Mineralogy, Wiley, 20th ed., pp. 295–318
• [http://webmineral.com/dana/3_Oxides.shtml Webmineral Dana Oxides]
• {{Cite journal |title=The standardisation of mineral group hierarchies: application to recent nomenclature proposals |author1=Stuart J. Mills |author2=Frédéric Hatert |author3=Ernest H. Nickel |author4=Giovanni Ferraris |name-list-style=amp |url=http://pubsites.uws.edu.au/ima-cnmnc/Mills%20et%20al%202009%20Groups%20EJM%20October.pdf |journal=Eur. J. Mineral. |year=2009 |pages=1073–1080 |doi=10.1127/0935-1221/2009/0021-1994 |volume=21 |issue=5 |bibcode=2009EJMin..21.1073M |access-date=2011-01-27 |archive-date=2011-02-17 |archive-url=https://web.archive.org/web/20110217063745/http://pubsites.uws.edu.au/ima-cnmnc/Mills%20et%20al%202009%20Groups%20EJM%20October.pdf |url-status=dead }}
• {{Cite web |url=http://pubsites.uws.edu.au/ima-cnmnc/IMA2009-01%20UPDATE%20160309.pdf |title=IMA-CNMNC List of Mineral Names |publisher=IMA-CNMNC |first1=Ernest H. |last1=Nickel |first2=Monte C. |last2=Nichols |authorlink1=Ernest Henry Nickel |authorlink2=Monte C. Nichols |date=March 2009 |access-date=2011-01-27 |archive-date=2012-03-26 |archive-url=https://web.archive.org/web/20120326100410/http://pubsites.uws.edu.au/ima-cnmnc/IMA2009-01%20UPDATE%20160309.pdf |url-status=dead }}
• {{Cite web |title=Nickel–Strunz (Version 10) Classification System |url=http://webmineral.com/strunz/strunz.php |publisher=webmineral.com |first=Jim |last=Ferraiolo }}

{{Refend}}

{{Strunz}}

*