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SYSTEMATIC of the MINERALS / SYSTEMATIK der MINERALE

           according to E.H. Nickel & M.C. Nichols (2007), H. Strunz & E.H. Nickel (2001)



4. OXIDES, HYDROXIDES
(Oxides, Hydroxides, V[5,6]-Vanadates, Arsenites, Antimonites, Bismutites, Sulfites, Selenites, Tellurites, Iodates)


4.D: Metal : Oxygen = 1 : 2 and similar


4.DA. With small cations: Silica family

4.DA.05. Quartz-Seifertite group

Quartz  /  Quarz SiO2 trig., P3121, P3221 FOTO     A
"Beta-Quartz"  /  "Beta-Quarz" SiO2 hex., P6222, P6422 H
Seifertite SiO2 orth., Pbcn or Pb2n IMA 2004-010

Beta-Quartz is stable only above 573°C and is regarded as a hypothetical mineral.
Seifertite is a high-pressure polymorph with alpha-PbO2 structure.



4.DA.10. Opal-Tridymite group

Tridymite SiO2 orth., C2221 FOTOG
Opal SiO2 · n H2O amorphous FOTOG

High-temperature beta-tridymite is hexagonal, P63/mmc.



4.DA.15. Cristobalite group

Cristobalite SiO2 tetr., P41212, P43212 FOTOG

High-temperature beta-cristobalite is cubic, Fd-3m.



4.DA.20. Mogánite group

Mogánite SiO2 mon., I2/a FOTOIMA 1999-035



4.DA.25. Melanophlogite group

Melanophlogite 46 SiO2 · C2H17O5 tetr., P42/nbc FOTORd

Above ca. 40°C, melanophlogite is cubic, Pm-3n, and isostructural with the cubic gas hydrates (group 4.AA.05).



4.DA.30. Lechatelierite group

Lechatelierite SiO2 amorphous Q



4.DA.35. Coesite group

Coesite SiO2 mon., C2/c FOTOA



4.DA.40. Stishovite group

Stishovite SiO2 tetr., P42mnm A






4.DB. With medium-sized cations, chains of edge-sharing M[6] octahedra

4.DB.05. Rutile group

Rutile TiO2 tetr., P42/mnm FOTOG
Pyrolusite MnO2 tetr., P42/mnm A
Argutite GeO2 tetr., P42/mnm IMA 1980-067
Cassiterite SnO2 tetr., P42/mnm FOTOG
Varlamoffite (Sn,Fe)(O,OH)2 tetr., P42/mnm Q
Plattnerite PbO2 tetr., P42/mnm FOTOG
Tripuhyite FeSbO4 tetr., P42/mnm FOTORd
Tugarinovite MoO2 mon., P21/c IMA 1979-072

Varlamoffite is possibly a ferroan, hydroxylian cassiterite.
"Ilmenorutile", discredited (2006), is a niobian rutile.
"Strüverite", discredited (2006), is a tantalian rutile.
"Squawcreekite", discredited (2003), is tripuhyite.



4.DB.10. Tapiolite group

Tapiolite-(Fe) Fe(Ta,Nb)2O6 tetr., P42/mnm FOTORn
Tapiolite-(Mn) Fe(Ta,Nb)2O6 tetr., P42/mnm Rn
Byströmite MgSb2O6 tetr., P42/mnm G
Ordonezite ZnSb2O6 tetr., P42/mnm G

Tapiolite-(Fe) was originally described as "Ferrotapiolite", renamed (2008).
Tapiolite-(Mn) was originally described as "Manganotapiolite", renamed (2008).



4.DB.15. Ramsdellite group

Ramsdellite MnO2 orth., Pbnm G
Paramontroseite VO2 orth., Pbnm G
Akhtenskite MnO2 hex., P63/mmc A
Nsutite Mn2+xMn4+1-xO2-2x(OH)2x hex. FOTOA



4.DB.20. Scrutinyite group

Scrutinyite PbO2 orth., Pbcn FOTOA



4.DB.25. Samarskite group

Calciosamarskite (Ca,Fe,Y)(Nb,Ta,Ti)O4 mon. G
Samarskite-(Y) (Y,Ce,U,...)(Nb,Ta)O4 orth., Pbcn FOTOA
Samarskite-(Yb) YbNbO4 mon., P2/c A
Yttrocolumbite-(Y) (Y,U,Fe)(Nb,Ta)O4 orth. A
Iwashiroite-(Y) YTaO4 mon., P2/a A
Ishikawaite (U,Fe,Y)NbO4 mon. G
Pisekite-(Y) (Y,As,Ca)(Nb,Ti,Ta)O4 mon., P21/n G
Ixiolite (Ta,Mn,Nb)O2 orth., Pbcn Rd
Srilankite Ti2ZrO6 orth., Pbcn A



4.DB.30. Wolframite group

Ferberite FeWO4 mon., P2/c FOTOG
Hübnerite FeWO4 mon., P2/c FOTOG
Magnesiowolframite MgWO4 mon., P2/c N
Sanmartinite ZnWO4 mon., P2/c A
IMA 2006-056 ScTaO4 mon., P2/c IMA 2006-056



4.DB.35. Columbite group

Columbite-(Mg) MgNb2O6 orth., Pbcn Rn
Columbite-(Fe) FeNb2O6 orth., Pbcn FOTORn
Columbite-(Mn) MnNb2O6 orth., Pbcn FOTORn
Tantalite-(Mg) MgTa2O6 orth., Pbcn Rn
Tantalite-(Fe) FeTa2O6 orth., Pbcn Rn
Tantalite-(Mn) MnTa2O6 orth., Pbcn FOTORn
Qitianlingite (Fe,Mn)2(Nb,Ta)2WO10 orth., Pbcn A

Columbite-(Mg) was originally described as "Magnocolumbite", renamed (2008).
Columbite-(Fe) was originally described as "Ferrocolumbite", renamed (2008).
Columbite-(Mn) was originally described as "Manganocolumbite", renamed (2008).
Tantalite-(Mg) was originally described as "Magnesiotantalite", renamed (2008).
Tantalite-(Fe) was originally described as "Ferrotantalite", renamed (2008).
Tantalite-(Mn) was originally described as "Manganotantalite", renamed (2008).



4.DB.40. Wodginite group

Ferrowodginite Fe(Sn,Ti,Ta,Fe)(Ta,Nb)2O8 mon., C2/c A
Wodginite MnSnTa2O8 mon., C2/c A
Titanowodginite MnTiTa2O8 mon., C2/c FOTOA
Ferrotitanowodginite Fe(Ti,Sn,Ta,Fe)(Ta,Nb)2O8 mon., C2/c A
Lithiowodginite LiTaTa2O8 mon., C2/c A
Lithiotantite Li(Ta,Nb)3O8 mon., P21/c A



4.DB.45. Tivanite group

Tivanite TiVO3(OH) mon., P21/c A



4.DB.50. Carmichaelite group

Carmichaelite (Ti,Cr,Fe)2O3(OH) mon., P21/c A



4.DB.55. Alumotantite group

Alumotantite AlTaO4 orth., Pbcn A



4.DB.60. Biehlite group

Biehlite Sb2MoO6 mon., C2/c FOTOA






4.DC. With medium-sized cations: Sheets of edge-sharing M[6] octahedra

4.DC.05. Bahianite group

Bahianite Al5Sb3O14(OH)2 mon., C2/m FOTOA



4.DC.10. Simpsonite group

Simpsonite Al4(Ta,Nb)3O13(OH) trig., P3 FOTOG






4.DD. With medium-sized cations: Frameworks of edge-sharing M[6] octahedra

4.DD.05. Anatase group

Anatase TiO2 tetr., I41/amd FOTOA



4.DD.10. Brookite group

Brookite TiO2 orth., Pbca FOTOG






4.DE. With medium-sized cations: with various polyhedra

4.DE.05. Downeyite group

Downeyite SeO2 tetr., P42/mbc A



4.DE.10. Koragoite group

Koragoite Mn2MnNb2(Nb,Ta)3W2O20 mon., P21 A



4.DE.15. Koechlinite group

Koechlinite Bi2MoO6 orth., Pna21 FOTOG
Russellite Bi2WO6 orth., Pna21 FOTOG
Tungstibite Sb2WO6 orth., P22121 FOTOA



4.DE.20. Tellurite group

Tellurite TeO2 orth., Pbca FOTOG



4.DE.25. Paratellurite group

Paratellurite TeO2 tetr., P43212 FOTOA



4.DE.30. Stibiotantalite-Cervatite group

Stibiotantalite SbTaO4 orth., Pna21 FOTOG
Stibiocolumbite SbNbO4 orth., Pna21 G
Bismutotantalite BiTaO4 orth., Pna21 G
Bismutocolumbite BiNbO4 orth., Pnan FOTOA
Cervantite Sb3+Sb5+O4 orth., Pna21 FOTORd
Clinocervantite Sb3+Sb5+O4 mon., A2/a FOTOA



4.DE.30. Baddeleyite group

IMA 2007-058 TiO2 mon., P21/c IMA 2007-058
Baddeleyite ZrO2 mon., P21/c FOTOG






4.DF. With large (+/- medium-sized) cations: dimers and trimers of edge-sharing octahedra

4.DF.05. Aeschynite group

Aeschynite-(Y) (Y,Ca,Fe,Th)(Ti,Nb)2(O,OH)6 orth., Pbnm FOTORn
Aeschynite-(Ce) (Ce,Ca,Fe,Th)(Ti,Nb)2(O,OH)6 orth., Pbnm A
Aeschynite-(Nd) (Nd,..)(Ti,Nb)2(O,OH)6 orth., Pbnm A
Niobo-Aeschynite-(Y) (Y,Ce,...)(Nb,Ti,Ta)2(O,OH)6 orth., Pbnm IMA 2003-038a
Niobo-Aeschynite-(Ce) (Ce,Ca)(Nb,Ti)2(O,OH)6 orth., Pbnm Rn
Niobo-Aeschynite-(Nd) (Nd,..)(Nb,Ti)2(O,OH)6 orth., Pbnm N
Tantal-Aeschynite-(Y) (Y,Ce)(Ta,Ti,Nb)2(O,OH)6 orth., Pbnm Rn
Rynersonite Ca(Ta,Nb)2O6 orth., Pbnm A
Vigezzite (Ca,Ce)(Nb,Ta,Ti)2O6 orth., Pbnm A



4.DF.10. Changbaiite group

Changbaiite PbNb2O6 trig., R3m FOTOA



4.DF.15. Murataite group

Murataite-(Y) (Y,Ca)6(Zn,Fe)4[(Ti,Nb)4ZnO29(O,F)14] cub., F-43m A






4.DG. With large (+/- medium-sized) cations: chains of edge-sharing octahedra

4.DG.05. Euxenite group

Fersmite (Ca,Ce)(Nb,Ta)2(O,OH,F)6 orth., Pbcn FOTOA
Euxenite-(Y) (Y,Ca,REE)(Nb,Ta)2(O,OH)6 orth., Pbcn FOTOA
Tanteuxenite-(Y) (Y,REE)(Ta,Nb)2(O,OH)6 orth., Pbcn A
Polycrase-(Y) Y(Ti,Nb)2(O,OH)6 orth., Pbcn A
Uranpolycrase (U,Y)(Ti,Nb)2(O,OH)6 orth., Pbcn FOTOA
Kobeite-(Y) (Y,U)(Ti,Nb)2(O,OH)6 (?) metamict A
Yttrocrasite-(Y) (Y,Th)(Ti,Fe)2(O,OH)6 metamict A
Loranskite-(Y) (Y,REE,Ca)(Zr,Ta)2(O,OH)6 (?) metamict A



4.DG.10. Beta-Fergusonite group

Beta-Fergusonite-(Y) YNbO4 mon., C2/c FOTOA
Beta-Fergusonite-(Ce) CeNbO4 mon., C2/c A
Beta-Fergusonite-(Nd) NdNbO4 mon., C2/c A
Yttrotantalite-(Y) (Y,U,Fe)(Ta,Nb)O4 metamict A



4.DG.15. Foordite group

Thoreaulite Sn(Ta,Nb)2O4 mon., C2/c FOTOG
Foordite Sn(Nb,Ta)2O6 mon., C2/c FOTOA



4.DG.20. Raspite group

Raspite PbWO4 mon., P21/a G






4.DH. With large (+/- medium-sized) cations: sheets of edge-sharing octahedra

4.DH.05. Brannerite group

Thorutite (Th,U,Ca)Ti2O6 mon., C2/m G
Brannerite (U,Ca,Y,Ce)(Ti,Fe)2O6 mon., C2/m FOTOA
Orthobrannerite UTi2O6(OH) metamict (orth.) A



4.DH.10. Lucasite group

Lucasite-(Ce) (Ce,La)Ti2(O,OH)6 mon., I2/a A
Kassite CaTi2O4(OH)2 orth. A



4.DH.15. Pyrochlore group

Pyrochlore Ca2Nb2O7 cub., Fd-3m FOTOA
Kalipyrochlore (H2O,K,Sr)2(Nb,Ti)2(O,OH)7 cub., Fd-3m A
Strontiopyrochlore Sr0.6Nb2(O,OH)7 cub., Fd-3m N
Bariopyrochlore Ba2Nb2O7 cub., Fd-3m Rn
Yttropyrochlore-(Y) (Y,Na,Ca,Ɛ)2(Nb,Ta)2(O,OH)7 cub., Fd-3m Rn
Ceriopyrochlore-(Ce) (Ca,Ce,Y,Na,&&400;)2(Nb,Ta)2(O,OH,F)7 cub., Fd-3m Rn
Plumbopyrochlore (Pb,Y,U,Ɛ)2Nb2(O,OH)7 cub., Fd-3m A
Bismutopyrochlore (Bi,U,Ca,Pb,Ɛ)2Nb2(O,OH)7 · n H2O metamict (cub.) A
Thoriopyrochlore (Ca,Th,Na,Ce,Ɛ)2(Nb,Zr,Ti)2(O,OH,F)7 N
Uranpyrochlore (Ca,U,Na,Ce,Ɛ)2(Nb,Ta)2(O,OH,F)7 cub., Fd-3m Rn
Microlite (Ca,Na)2(Ta,Nb)2(O,OH,F)7 cub., Fd-3m FOTOA
Fluornatromicrolite (Na,Ca,Bi)2(Ta,Nb)2O6F cub., Fd-3m FOTOIMA 1998-018
Bariomicrolite (Ba,Ɛ)2(Ta,Nb)2(O,OH)7 cub., Fd-3m A
Stannomicrolite (Sn,Fe,Mn,Ɛ)2(Ta,Nb)2(O,OH,F)7 cub., Fd-3m Rn
Plumbomicrolite (Pb,Na,Ca,Ɛ)2(Ta,Nb)2(O,OH)7 cub., Fd-3m FOTOA
Stibiomicrolite (Sb,Ca,Na)2(Ta,Nb)2(O,OH,F)7 cub., Fd-3m A
Bismutomicrolite (Bi,Ca,Ɛ)2(Ta,Nb)2(O,OH)7 cub., Fd-3m FOTOA
Uranmicrolite (U,Ca,Ce,Ɛ)2(Ta,Nb)2(O,OH,F)7 cub., Fd-3m A
Betafite (Ca,U,Ɛ)2(Ti,Nb,Ta)2(O,OH)7 cub., Fd-3m FOTORd
Calciobetafite (Ca,Na)2(Nb,Ti)2(O,OH)7 cub., Fd-3m A
Yttrobetafite-(Y) (Y,U,Ce,Ɛ)2(Ti,Nb)2(O,OH)7 metamict (tetr.) A
Plumbobetafite (Pb,U,Ca,Ɛ)2(Ti,Nb)2(O,OH,F)7 cub., Fd-3m A
Stibiobobetafite (Ca,Sb,Ɛ)2(Ti,Nb)2(O,OH)7 cub., Fd-3m A
Cesstibtantite (Cs,Sb,Na,Ɛ)2(Ta,Nb)2(O,OH,F)7 cub., Fd-3m A
Ferritungstite (W,Fe)2(O,OH)6 · n (H2O,K,Ca,Na) cub., Fd-3m FOTOA
Alumotungstite (H2O,Ca,Ɛ)x(W,Al)2(O,OH)6 · n H2O cub. A
Elsmoreite WO3 · 0.5 H2O cub., Fd-3m A
Jixianite (Pb,Ɛ)2(W,Fe)2(O,OH)7 cub., Fd-3m A
Natrobistantite (Na,Cs)Bi(Ta,Nb,Sb)4(O,OH)12 cub., Fd-3m A



4.DH.20. Stibiconite group

Stibiconite Sb3+Sb5+2O6(OH) cub., Fd-3m G
Roméite (Ca,Fe,Mn,Na)2(Sb,Ti)2O6(O,OH,F) cub., Fd-3m FOTOG
Bindheimite Pb2Sb2O6(O,OH) cub., Fd-3m FOTOG
Partzite Cu2Sb2(O,OH)7 (?) cub. G
Bismutostibiconite (Bi,Fe,Ɛ)2Sb2O7 cub., Fd-3m A
Hydroroméite (Ca,Mn)(Sb,W,As)2O6 · 4.2 H2O Q
Monimolite Pb3Sb2O7 cub. Q
Stetefeldite Ag2Sb2(O,OH)7 (?) cub. Q



4.DH.25. Rosiaite group

Rosiaite PbSb2O6 trig., P-31m FOTOA



4.DH.30. Zirconolite group

Zirconolite    (Zirconolite-2M) (Ca,Y)Zr(Ti,Mg,Al)2O7 mon., C2/c Rd
     Zirconolite-3O (Ca,Fe,Y)2Fe(Ti,Nb)3Zr2O14 orth., Acam FOTOPoly
     Zirconolite-3T CaZrTi2O7 trig., P3121 Poly



4.DH.35. Petscheckite group

Petscheckite UFe(Nb,Ta)2O8 trig., P-31m A
Liandratit U(Nb,Ta)2O8 trig., P-31m A



4.DH.40. Ingersonite group

Ingersonite Ca3MnSb4O14 trig. A



4.DH.45. Pittongite group

Pittongite (Na,H2O)0.7(W,Fe)(O,OH)3 hex., P-6ms IMA 2005-034






4.DJ. With large (+/- medium-sized) cations: polyhedral frameworks

4.DJ.05. Natrotantite group

Natrotantite Na2Ta4O11 trig., R-3c A
Irtyshite Na2(Ta,Nb)4O11 hex., P63/m or P63 A
Calciotantite CaTa4O11 hex., P6322 A






4.DK. With large (+/- medium-sized) cations: tunnel structures

4.DK.05. Hollandite group

Hollandite (Ba,K,Ca)(Mn,Ti,Fe)8O16 mon., I2/m FOTOG
Coronadite PbMn8O16 mon., I2/m FOTOG
Manjiroite NaMn8O16 · n H2O tetr., I4/m FOTOA
Akaganéite Fe8(OH,O)16Cl1.25 · n H2O mon., I2/m FOTOA
Priderite (K,Ba)(Ti,Fe)8(O,OH)16 tetr., I4/m G
Redledgeite Ba(Ti,Cr,Fe)8O16 tetr., I4/m FOTOA
Ankangite Ba(Ti,V,Cr)8O16 tetr. A
Henrymeyrite BaTi7FeO16 tetr., I4/m FOTOA
Mannardite Ba(Ti,V,Cr)8O16 · H2O tetr., I41/a A



4.DK.10. Cryptomelane group

Todorokite (Na,Ca,K)1-x(Mn,Mg,Al)6O12 · 3-4 H2O mon., P2/m A
Cryptomelane    (Cryptomelane-1M) KMn8O16 mon., I2/m FOTOA
     Cryptomelane-1Q KMn8O16 tetr., I4/m Poly
Strontiomelane (Sr,Ba,K)Mn8O16 mon., P21/m A
Romanèchite (Ba,H2O)2Mn5O10 mon., C2/m FOTOA






4.DL. With large (+/- medium-sized) cations: fluorite type structures

4.DL.05. Uraninite group

Uraninite UO2 cub., Fm-3m FOTOENTDECKUNGG
Thorianite ThO2 cub., Fm-3m FOTOG
Cerianite-(Ce) CeO2 cub., Fm-3m A
Zirkelite (Ti,Ca,Zr)O2-x cub., Fm-3m Rd



4.DL.10. Calzirtite group

Calzirtite    (Calzirtite-1Q) Ca2Zr5Ti2O16 tetr., I41/acd A
     Calzirtite-1O Ca2Zr5Ti2O16 orth., Pbca Poly
Hiärneite Ca2(Zr,Ti)5(Sb,Mn)2O16 tetr., I41/acd A
Tazheranite (Zr,Ti,Ca)(O,Ɛ)2 cub., Fm-3m FOTOA






4.DM. With large (+/- medium-sized) cations: unclassified

4.DM.05. Rankamaite group

Rankamaite (Na,K,Pb)(Ta,Nb,Al)4(O,OH)10 orth. FOTOA
Sosedkoite K5Al2Ta22O60 orth. A



4.DM.10. (Group removed)




4.DM.15. Cesplumtantite group

Cesplumtantite (Cs,Na)2(Pb,Sb)3Ta8O24 tetr. A



4.DM.20. Eyselite group

Eyselite Fe3+Ge4+3O7(OH) orth., P... A



4.DM.25. Kuranakhite group

Kuranakhite PbMn4+Te6+O6 orth. FOTOA








in bold: grandfathered, IMA accepted, renamed and redefined (with IMA approval) minerals,
in normal letters: minerals published without IMA approval, questionable minerals, polytypes

G = Grandfathered minerals: original description preceded the establishment of the CNMNC in 1959, and generally regarded as a valid species
A or IMA No. = Minerals approved by the CNMNC
Rd = Redefinition of the mineral approved by the CNMNC
Rn = Renamed with approval by the CNMNC
GROUP = a name used to designate a group of species
N = Mineral published without approval of the CNMNC
Q = Questionable mineral
H = Hypothetical mineral (synthetic, anthropogenic, etc.)
D = Discredited by the CNMNC
Poly = Polytype



© Thomas Witzke / Stollentroll (2007 - 2008)


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