Pseudorutile
A valid IMA mineral species
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About Pseudorutile
Formula:
Fe3+2Ti4+3O9
Colour:
Dark steel-gray on fresh fractures, light brown to black
Lustre:
Metallic, Sub-Metallic
Hardness:
5½
Specific Gravity:
3.8
Crystal System:
Hexagonal
Name:
Named for the relation to rutile.
Type Locality:
Closely related to kleberite. Chemically, but not structurally, the Fe analogue of machiite and schreyerite. The Fe analogue of (the Mn dominant) UM2004-26-O:FeMnTi.
Compare the chemically similar carmichaelite.
See also Arizonite (of Palmer).
Compare the chemically similar carmichaelite.
See also Arizonite (of Palmer).
Unique Identifiers
Mindat ID:
3296
Long-form identifier:
mindat:1:1:3296:0
IMA Classification of Pseudorutile
Approved
IMA status notes:
Redefined by the IMA
First published:
1966
Approval history:
Redefined 1994 s.p.: Grey et al. (1994).
Classification of Pseudorutile
4.CB.25
4 : OXIDES (Hydroxides, V[5,6] vanadates, arsenites, antimonites, bismuthites, sulfites, selenites, tellurites, iodates)
C : Metal: Oxygen = 2: 3,3: 5, and similar
B : With medium-sized cations
4 : OXIDES (Hydroxides, V[5,6] vanadates, arsenites, antimonites, bismuthites, sulfites, selenites, tellurites, iodates)
C : Metal: Oxygen = 2: 3,3: 5, and similar
B : With medium-sized cations
8.4.2.1
8 : MULTIPLE OXIDES CONTAINING NIOBIUM,TANTALUM OR TITANIUM
4 : A2B3O9
8 : MULTIPLE OXIDES CONTAINING NIOBIUM,TANTALUM OR TITANIUM
4 : A2B3O9
7.9.18
7 : Oxides and Hydroxides
9 : Oxides of Ti
7 : Oxides and Hydroxides
9 : Oxides of Ti
Mineral Symbols
As of 2021 there are now IMA–CNMNC approved mineral symbols (abbreviations) for each mineral species, useful for tables and diagrams.
| Symbol | Source | Reference for Standard |
|---|---|---|
| Pdrt | IMA–CNMNC | Warr, L.N. (2021). IMA–CNMNC approved mineral symbols. Mineralogical Magazine, 85(3), 291-320. doi:10.1180/mgm.2021.43 |
Pronunciation of Pseudorutile
Pronunciation:
| Play | Recorded by | Country |
|---|---|---|
| Jolyon & Katya Ralph | United Kingdom |
Physical Properties of Pseudorutile
Metallic, Sub-Metallic
Transparency:
Opaque
Colour:
Dark steel-gray on fresh fractures, light brown to black
Streak:
Reddish brown
Hardness:
5½ on Mohs scale
Tenacity:
Brittle
Fracture:
Sub-Conchoidal
Density:
3.8 g/cm3 (Measured) 4.82 g/cm3 (Calculated)
Optical Data of Pseudorutile
Type:
Uniaxial
Pleochroism:
Weak
Comments:
very weak in reds
Comments:
n = ∼2.62
Chemistry of Pseudorutile
Mindat Formula:
Fe3+2Ti4+3O9
Element Weights:
Elements listed:
Crystallography of Pseudorutile
Crystal System:
Hexagonal
Class (H-M):
622 - Trapezohedral
Space Group:
P6322
Cell Parameters:
a = 14.375(6) Å, c = 4.615(3) Å
Ratio:
a:c = 1 : 0.321
Unit Cell V:
825.88 ų (Calculated from Unit Cell)
Z:
6
Morphology:
thin, irregular plates having fibrous texture; fine-grained, massive.
Crystal Structure
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Data courtesy of the American Mineralogist Crystal Structure Database. Click on an AMCSD ID to view structure
| ID | Species | Reference | Link | Year | Locality | Pressure (GPa) | Temp (K) |
|---|---|---|---|---|---|---|---|
| 0000471 | Pseudorutile | Grey I E, Reid A F (1975) The structure of pseudorutile and its role in the natural alteration of ilmenite American Mineralogist 60 898-906 | ![]() | 1975 | 0 | 293 |
CIF Raw Data - click here to close
X-Ray Powder Diffraction
Powder Diffraction Data:
| d-spacing | Intensity |
|---|---|
| 1.6860 Å | (100) |
| 2.481 Å | (80) |
| 2.187 Å | (70) |
| 2.784 Å | (20d) |
| 3.897 Å | (15d) |
| 2.2993 Å | (8) |
| 1.6253 Å | (6d) |
Geological Environment
Paragenetic Mode(s):
| Paragenetic Mode | Earliest Age (Ga) |
|---|---|
| Stage 7: Great Oxidation Event | <2.4 |
| 47h : [Near-surface oxidized, dehydrated minerals] |
Type Occurrence of Pseudorutile
Place of Conservation of Type Material:
Museum Victoria, Melbourne, Australia, M42789.
Associated Minerals at Type Locality:
Other Language Names for Pseudorutile
Dutch:Pseudorutiel
German:Pseudorutil
Varieties of Pseudorutile
Common Associates
Associations Based on Photo Data:
| 1 photo of Pseudorutile associated with Kleberite | FeTi6O11(OH)5 |
| 1 photo of Pseudorutile associated with Quartz | SiO2 |
| 1 photo of Pseudorutile associated with Topaz | Al2(SiO4)(F,OH)2 |
| 1 photo of Pseudorutile associated with Chromite | Fe2+Cr3+2O4 |
| 1 photo of Pseudorutile associated with Bixbyite-(Mn) | Mn3+2O3 |
| 1 photo of Pseudorutile associated with Dolomite | CaMg(CO3)2 |
Related Minerals - Strunz-mindat Grouping
| 4.CB. | Magnesiohögbomite-6N12S | Mg5Al11TiO23(OH) |
| 4.CB. | Kidodite | BaMg2Fe16O27 |
| 4.CB. | Ferrohögbomite-2N2S | [(Fe2+,Mg,Zn,Al)3(Al,Ti,Fe3+)8O15(OH)]2 |
| 4.CB. | Zhenruite | (MoO3)2 · H2O |
| 4.CB. | Fuyuanite | Mg7Nb6O18(OH)8 |
| 4.CB. | Virgilluethite | MoO3 · H2O |
| 4.CB. | Pengite | (Pb8Sb3+3)Σ11Sb5+9O35 |
| 4.CB.05 | Brizziite | NaSb5+O3 |
| 4.CB.05 | Tistarite | Ti3+2O3 |
| 4.CB.05 | Hematite | Fe2O3 |
| 4.CB.05 | Ecandrewsite | ZnTiO3 |
| 4.CB.05 | Melanostibite | Mn2+2Fe3+Sb5+O6 |
| 4.CB.05 | 'UM1998-11-O-AuHSb' | Au+2Sb3+O2(OH) |
| 4.CB.05 | Karelianite | V3+2O3 |
| 4.CB.05 | Corundum | Al2O3 |
| 4.CB.05 | Eskolaite | Cr2O3 |
| 4.CB.05 | Geikielite | MgTiO3 |
| 4.CB.05 | Akimotoite | MgSiO3 |
| 4.CB.05 | 'Unnamed (Fe-Cr Oxide)' | FeCrO3 |
| 4.CB.05 | 'Auroantimonate' | AuSbO3 |
| 4.CB.05 | Hemleyite | Fe2+SiO3 |
| 4.CB.05 | Ilmenite | Fe2+TiO3 |
| 4.CB.05 | Pyrophanite | Mn2+TiO3 |
| 4.CB.10 | Bixbyite-(Fe) | (Fe,Mn)2O3 |
| 4.CB.10 | Bixbyite-(Mn) | Mn3+2O3 |
| 4.CB.10 | Avicennite | Tl3+2O3 |
| 4.CB.15 | Armalcolite | MgTi4+2O5 |
| 4.CB.15 | Ferropseudobrookite | Fe2+Ti4+2O5 |
| 4.CB.15 | Griffinite | Al2Ti4+O5 |
| 4.CB.15 | Pseudobrookite Group | |
| 4.CB.15 | Sassite | Ti3+2Ti4+O5 |
| 4.CB.15 | Pseudobrookite | Fe3+2Ti4+O5 |
| 4.CB.20 | Zincovelesite-6N6S | Zn3(Fe3+,Mn3+,Al,Ti)8O15(OH) |
| 4.CB.20 | Magnesiohögbomite-2N4S | (Mg8.43Fe2+1.57)Σ=10Al22Ti4+2O46(OH)2 |
| 4.CB.20 | Magnesiobeltrandoite-2N3S | (Mg6Al2)(Al18Fe3+2)O38(OH)2 |
| 4.CB.20 | Zincohögbomite-2N6S | [(Zn,Mg)7(Al,Fe3+,Ti)16O31(OH)]2 |
| 4.CB.20 | Magnesiohögbomite-6N6S | [(Mg,Fe2+)3(Al,Ti,Fe3+)8O15(OH)]6 |
| 4.CB.20 | Magnesiohögbomite-2N3S | [(Mg,Fe2+,Zn)4(Al,Ti,Fe3+)10O19(OH)]2 |
| 4.CB.20 | Magnesiohögbomite-2N2S | [(Mg,Fe2+)3[Al7(Ti,Fe3+)]O15(OH)]2 |
| 4.CB.20 | 'Ferrohögbomite-6N12S' | [(Fe2+,Mg,Zn)5(Al,Ti,Fe3+)12O23(OH)]6 |
| 4.CB.20 | Zincohögbomite-2N2S | [(Zn,Al,Fe2+)3(Al,Fe3+,Ti)8O15(OH)]2 |
| 4.CB.25 | Kleberite | FeTi6O11(OH)5 |
| 4.CB.30 | Oxyvanite | V3+2V4+O5 |
| 4.CB.30 | Berdesinskiite | V3+2TiO5 |
| 4.CB.30 | Kaitianite | Ti3+2Ti4+O5 |
| 4.CB.35 | Machiite | Al2Ti3O9 |
| 4.CB.35 | Vestaite | (Ti4+Fe2+)Ti4+3O9 |
| 4.CB.35 | Olkhonskite | (Cr,V)2Ti3O9 |
| 4.CB.35 | Schreyerite | V3+2Ti4+3O9 |
| 4.CB.40 | Zincorinmanite-(Zn) | Zn2Sb2(Fe3+4Zn2)O14(OH)2 |
| 4.CB.40 | Majindeite | Mg2Mo3O8 |
| 4.CB.40 | Almagreraite | CuZnMn4+3O8 |
| 4.CB.40 | Kamiokite | Fe2Mo3O8 |
| 4.CB.40 | Nolanite | V3+8Fe3+2O14(OH)2 |
| 4.CB.40 | Iseite | Mn2Mo3O8 |
| 4.CB.40 | Rinmanite | Zn2Sb2Mg2Fe4O14(OH)2 |
| 4.CB.45 | Stibioclaudetite | AsSbO3 |
| 4.CB.45 | Claudetite | As2O3 |
| 4.CB.50 | Senarmontite | Sb2O3 |
| 4.CB.50 | Arsenolite | As2O3 |
| 4.CB.55 | Valentinite | Sb2O3 |
| 4.CB.60 | Bismite | Bi2O3 |
| 4.CB.65 | Sphaerobismoite | Bi2O3 |
| 4.CB.70 | Sillénite | Bi12SiO20 |
| 4.CB.75 | Kyzylkumite | V3+Ti2O5(OH) |
| 4.CB.80 | 'Tietaiyangite' | Fe3+4Fe2+TiO9 |
| 4.CB.85 | Liuite | FeTiO3 |
| 4.CB.90 | Luogufengite | Fe2O3 |
| 4.CB.95 | Wangdaodeite | FeTiO3 |
Other Information
Notes:
magnetic
Health Risks:
No information on health risks for this material has been entered into the database. You should always treat mineral specimens with care.
Internet Links for Pseudorutile
mindat.org URL:
https://www.mindat.org/min-3296.html
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References for Pseudorutile
Reference List:
KARKHANAVALA, M. D., MOMIN, A. C. (1959) Subsolidus Reactions in the System Fe2O3- TiO2. Journal of the American Ceramic Society, 42 (8). 399-402 doi:10.1111/j.1151-2916.1959.tb13600.x
TEUFER, G.; TEMPLE, A. K. (1966) Pseudorutile—a New Mineral Intermediate between Ilmenite and Rutile in the Natural Alteration of Ilmenite. Nature, 211 (5045). 179-181 doi:10.1038/211179b0
Grey, Ian E., Reid, Alan F. (1975) The structure of pseudorutile and its role in the natural alteration of ilmenite. American Mineralogist, 60 (9-10) 898-906
Wort, M. J., Jones, M. P. (1980) X-ray diffraction and magnetic studies of altered ilmenite and pseudorutile. Mineralogical Magazine, 43 (329) 659-663 doi:10.1180/minmag.1980.043.329.16
Melcher, F. (1991) Fe-Ti-Oxide assemblages in the basal parts of the Central Alpine Brenner Mesozoic, Tyrol/Austria. Mineralogy and Petrology, 44 (3) 197-212 doi:10.1007/bf01166963
Mücke, A.; Bhadra Chaudhuri, J.N. (1991) The continuous alteration of ilmenite through pseudorutile to leucoxene. Ore Geology Reviews, 6 (1). 25-44 doi:10.1016/0169-1368(91)90030-b
Grey, Ian E., Watts, John A., Bayliss, Peter (1994) Mineralogical nomenclature: pseudorutile revalidated and neotype given. Mineralogical Magazine, 58 (393) 597-600 doi:10.1180/minmag.1994.058.393.07
Tetsopgang, S., Koyanagi, J., Enami, M., Kihara, K. (2003) Hydroxylian pseudorutile in an adamellite from the Nkambe area, Cameroon. Mineralogical Magazine, 67 (3) 509-516 doi:10.1180/0026461036730113
Grey, I. E., Li, C. (2003) Hydroxylian pseudorutile derived from picroilmenite in the Murray Basin, southeastern Australia. Mineralogical Magazine, 67 (4) 733-747 doi:10.1180/0026461036740130
Grey, I. E., Bordet, P., Wilson, N. C., Townend, R., Bastow, T. J., Brunelli, M. (2010) A new Al-rich hydroxylian pseudorutile from Kalimantan, Indonesia. American Mineralogist, 95 (1) 161-170 doi:10.2138/am.2010.3330
Localities for Pseudorutile
Showing 44 localities.
Locality List
- This locality has map coordinates listed.
- This locality has estimated coordinates.
ⓘ - Click for references and further information on this occurrence.
? - Indicates mineral may be doubtful at this locality.
- Good crystals or important locality for species.
- World class for species or very significant.
(TL) - Type Locality for a valid mineral species.
(FRL) - First Recorded Locality for everything else (eg varieties).
All localities listed without proper references should be considered as questionable.
Algeria | |
| Hejny et al. (2002) |
Antarctica | |
| Grew et al. (2007) |
| Babenko et al. (2026) | |
Australia | |
| [var: Hydroxylian Pseudorutile] Museum Victoria Mineralogy Collection |
| Grey et al. (1994) |
| Bottrill & Bacon in prep |
| Birch et al. (2007) +1 other reference |
| Mills (2004) |
Austria | |
| Kolitsch et al. (2026) |
| Melcher (1991) +1 other reference |
Brazil | |
| de Menezes et al. (2024) |
Cameroon | |
| [var: Hydroxylian Pseudorutile] Tetsopgang et al. (2003) |
Canada | |
| Ercit et al. (2003) |
| Ercit (1994) |
| 176-178. +2 other references |
Czech Republic | |
| Scharm +7 other references |
| Škoda et al. (2016) +1 other reference |
Germany | |
| Bautsch et al. (1978) |
| Bautsch et al. (1978) +1 other reference |
| www.uni-wuerzburg.de (n.d.) |
| Bautsch et al. (1978) +1 other reference |
| Bautsch et al. (1978) |
Greece | |
| Iliopoulos et al. (2004) |
Hungary | |
| Gál P. (2014) |
Indonesia | |
| Zglinicki et al. (2021) |
Kazakhstan | |
| Suiekpayev et al. (2019) +1 other reference |
Poland | |
| Ł. Kruszewski |
| Godyń et al. (2002) |
Russia | |
| Dai et al. (2022) |
| Kostin (2021) |
| Patyk-Kara et al. (2008) |
| Sklyarov et al. (2016) |
Senegal | |
| Delaporte (2020) |
Slovakia | |
| Uher et al. (2015) |
South Africa | |
| Macdonald et al. (1997) |
Ukraine | |
| Sharygin et al. (2011) |
USA | |
| Hanson et al. (2013) |
| AmMin 84:754-763 |
| www.smmp.net/IMA-CM/ctms_p.pdf. | |
| rruff.geo.arizona.edu (n.d.) |
| 55TH INSTITUTE ON LAKE SUPERIOR GEOLOGY (2009) |
| Andersen et al. (2017) |
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Alluvial gold mine, Carapooee, Northern Grampians Shire, Victoria, Australia