Ixiolite Group
A group of related mineral species
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About Ixiolite Group
Formula:
M1O2
Member of:
Name:
Named after ixiolite, the first mineral described in this group, originally named by Nordenskiöld in 1857.
A group belonging to the Columbite Supergroup, and consist of tantalum–niobium oxide minerals found mainly in granitic pegmatites. They are characterised by a cation‑disordered crystal structure similar in composition to minerals of the Columbite Group but lacking their ordered atomic arrangement.
In the crystal structure of ixiolite-group minerals, all cations occupy a single M1 site.
In the crystal structure of ixiolite-group minerals, all cations occupy a single M1 site.
Unique Identifiers
Mindat ID:
56151
Long-form identifier:
mindat:1:1:56151:6
Chemistry of Ixiolite Group
Mindat Formula:
M1O2
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) |
|---|---|---|---|---|---|---|---|
| 0016662 | Srilankite | Bordet P, McHale A, Santoro A, Roth R (1986) Powder neutron diffraction study of ZrTiO4, Zr5Ti7O24, and FeNb2O6 _cod_database_code 1008790 Journal of Solid State Chemistry 64 30-46 | 1986 | synthetic | 0 | 293 | |
| 0010854 | Srilankite | Willgallis A, Hartl H (1983) (Zr0.33Ti0.67)O2 - ein naturliches zirkonium-titanoxid mit alpha-PbO2-struktur Zeitschrift fur Kristallographie 164 59-66 |  | 1983 | Rakwana, Sri Lanka | 0 | 293 |
| 0008989 | Srilankite | Troitzsch U, Christy A G, Ellis D J (2005) The crystal structure of disordered (Zr,Ti)O2 solid solution Physics and Chemistry of Minerals 32 504-514 | 2005 | 0 | 293 | ||
| 0008988 | Srilankite | Troitzsch U, Christy A G, Ellis D J (2005) The crystal structure of disordered (Zr,Ti)O2 solid solution Physics and Chemistry of Minerals 32 504-514 | 2005 | 0 | 293 | ||
| 0008987 | Srilankite | Troitzsch U, Christy A G, Ellis D J (2005) The crystal structure of disordered (Zr,Ti)O2 solid solution Physics and Chemistry of Minerals 32 504-514 | 2005 | 0 | 293 | ||
| 0008986 | Srilankite | Troitzsch U, Christy A G, Ellis D J (2005) The crystal structure of disordered (Zr,Ti)O2 solid solution Physics and Chemistry of Minerals 32 504-514 | 2005 | 0 | 293 | ||
| 0008985 | Srilankite | Troitzsch U, Christy A G, Ellis D J (2005) The crystal structure of disordered (Zr,Ti)O2 solid solution Physics and Chemistry of Minerals 32 504-514 | 2005 | 0 | 293 | ||
| 0008984 | Srilankite | Troitzsch U, Christy A G, Ellis D J (2005) The crystal structure of disordered (Zr,Ti)O2 solid solution Physics and Chemistry of Minerals 32 504-514 | 2005 | 0 | 293 | ||
| 0008983 | Srilankite | Troitzsch U, Christy A G, Ellis D J (2005) The crystal structure of disordered (Zr,Ti)O2 solid solution Physics and Chemistry of Minerals 32 504-514 | 2005 | 0 | 293 | ||
| 0002871 | Seifertite | Dera P, Prewitt C T, Boctor N Z, Hemley R J (2002) Characterization of a high-pressure phase of silica from the Martian meteorite Shergotty alpha-PbO2-like American Mineralogist 87 1018-1023 | | 2002 | 0 | 293 | |
| 0011770 | Scrutinyite | Wyckoff R W G (1963) Second edition. Interscience Publishers, New York, New York Crystal Structures 1 239-444 | 1963 | 0 | 293 |
CIF Raw Data - click here to close
Relationship of Ixiolite Group to other Species
Member of:
Other Members of Columbite Supergroup:
| Columbite Group | ||
| Dmitryvarlamovite | Ti2(Fe3+Nb)O8 | Orth. 222 : P21212 |
| Huangshanite | Fe3+TaO4 | Mon. 2/m : P2/b |
| Samarskite Group | A3+B3+C5+2O8 | |
| Wodginite Group | ||
| Wolframite Group | Note: "Wolframite" usually has a chemical composition covering the range between Hübnerite and ... | |
| Yttrocolumbite-(Y) | Y(U4+,Fe2+)Nb2O8 |
Ixiolite Group Members:
| Ixiolite-(Fe2+) | (Ta0.67Fe2+0.33)O2 | Orth. mmm(2/m2/m2/m) : Pbcn |
| Ixiolite-(Mn2+) | (Ta0.67Mn2+0.33)O2 | Orth. mmm(2/m2/m2/m) : Pbcn |
| Ixiolite-(Sc) | (Ta0.5Sc0.5)O2 | Orth. mmm(2/m2/m2/m) : Pbcn |
| Nioboixiolite-(Fe2+) | (Nb0.67Fe2+0.33)O2 | Orth. mmm(2/m2/m2/m) : Pbcn |
| Nioboixiolite-(Fe3+) | (Nb0.5Fe3+0.5)O2 | Orth. mmm(2/m2/m2/m) : Pbcn |
| Nioboixiolite-(Mn2+) | (Nb0.67Mn2+0.33)O2 | Orth. mmm(2/m2/m2/m) : Pbcn |
| Nioboixiolite-([]) | (Nb0.8◻0.2)4+O2 | Orth. mmm(2/m2/m2/m) : Pbcn |
| Scrutinyite | α-PbO2 | Orth. mmm(2/m2/m2/m) : Pbcn |
| Seifertite | SiO2 | Orth. mmm(2/m2/m2/m) : Pbcn |
| Srilankite | TiO2 | Orth. mmm(2/m2/m2/m) : Pbcn |
Click on any node to view relationships. Formula-derived relationship network for the group members above. Use Find related species to add formula-neighbour species outside the current group view. Solid links show inferred chemical differences; dashed violet links show same-formula crystallographic differences. Hydration states are not treated as relationship changes. These relationships do not imply any real-world substitution reactions between these species.
Other Information
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 Ixiolite Group
mindat.org URL:
https://www.mindat.org/min-56151.html
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References for Ixiolite Group
Reference List:
Nordenskiöld, A. E. (1857) Beitrag zu Finnlands Mineralogie. Annalen der Physik und Chemie, 177. 625-642 doi:10.1002/andp.18571770807
Localities for Ixiolite Group
Showing 52 localities.
symbol to view information about a locality.
The 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.
Antarctica | |
| [Srilankite] Osanai; Yasuhito; Toyoshima; Tsuyoshi; Owada; Masaaki (2001) |
| [Srilankite] Mallik et al. (2024) |
Australia | |
| [Srilankite] Kirby et al. (2022) |
| [Srilankite] Habibi et al. (2026) |
| [Srilankite] Brenner et al. (2025) |
Austria | |
| [Srilankite] Kohn et al. (2024) |
Canada | |
| [Srilankite] Canadian Museum of Nature collection |
| [Srilankite] Piilonen et al. (2025) | |
| [Ixiolite-(Mn2+)] Grice et al. (1976) +1 other reference |
China | |
| [Nioboixiolite-([])] Bosi et al. (2023) |
| [Srilankite] Chen et al. (2013) |
Colombia | |
| [Srilankite] Betancur-Figueroa et al. (2020) |
Cuba | |
| [Srilankite] Pujol-Solà et al. (2020) |
Eurasian Plate | |
| [Srilankite] Gottman et al. (2018) |
Finland | |
| [Ixiolite-(Fe2+), Ixiolite-(Mn2+)] Nordenskiöld (1857) +2 other references |
Germany | |
| [Nioboixiolite-(Fe3+)] Chukanov et al. (2024) |
Greece | |
| [Scrutinyite] |
| [Scrutinyite] 62 +2 other references |
India | |
| [Seifertite] Goresy et al. (2008) |
Indian Ocean | |
| [Srilankite] Morishita +4 other references |
Italy | |
| [Srilankite] Tumiati et al. (2018) |
Kazakhstan | |
| [Ixiolite-(Mn2+)] Pavel M. Kartashov analytical data |
Madagascar | |
| [Nioboixiolite-(Mn2+)] Carnegie Museum of Natural History ... |
Mexico | |
| [Srilankite] León et al. (2016) |
| [Scrutinyite] Taggart et al. (1988) +2 other references |
Mozambique | |
| [Ixiolite-(Mn2+)] Pavel M. Kartashov analytical data |
Myanmar | |
| [Srilankite] Themelis (2008) |
Namibia | |
| [Scrutinyite] Brandstätter +4 other references |
Nigeria | |
| [Seifertite] Zhidong Xie et al. (2005) |
Northwest Africa Meteorites | |
| [Seifertite] Gu et al. (2025) | |
| [Seifertite] Shohei Kaneko et al. (2011) +2 other references | |
Norway | |
| [Ixiolite-(Sc)] Bosi et al. (2025) +2 other references |
| [Srilankite] Cempírek J. et al. (2010) +1 other reference |
Poland | |
| [Nioboixiolite-(Fe2+)] Zelek-Pogudz et al. (2026) |
Russia | |
| [Srilankite] Gottman et al. (2018) |
| [Srilankite] Korinevsky et al. (2016) |
| [Srilankite] Mikhailova et al. (2007) |
| [Nioboixiolite-(Mn2+)] N. V. Chukanov et al. (2023) +1 other reference |
Serbia | |
| [Scrutinyite] Mineco Limited |
South Africa | |
| [Srilankite] Konzett et al. (2013) |
Spain | |
| [Scrutinyite] Joan Abella i Creus (Joanabellacreus@gmail.com) |
Sri Lanka | |
| [Srilankite] Willgallis et al. (1983) +1 other reference |
USA | |
| [Srilankite] Mandarino (2001) +1 other reference |
| [Srilankite] Ague et al. (2012) |
| [Scrutinyite] Castor et al. (2004) |
| [Scrutinyite] Northrop et al. (1996) |
| [Scrutinyite] Taggart et al. (1988) |
| [Scrutinyite] DeMark et al. (1999) | |
| [Scrutinyite] King et al. (1995) | |
The Moon | |
| [Seifertite] Pang et al. (2022) +1 other reference |
| [Srilankite] Stadermann et al. (2024) |
In den Dellen quarries, Mendig, Mendig, Mayen-Koblenz, Rhineland-Palatinate, Germany