First referred to as Kimito-Tantalit, but later named by Nordenskiöld (1857) after Ixion, a king in Greek mythology punished by Zeus and bound to a fiery, spinning wheel for eternity and -lite, from Greek lithos (stone). The name was given parallel with tantalite (who was named after Tantalus, also a king in Greek mythology and relative of Ixion), in allusiuon to the tantalum content of the material.
The suffix -(Fe2+) was added later (in 2022), for the dominant kation at the M1-site.

Type Locality:

ⓘ Skogsböle (Skogböle), Kimitoön Island, Kimitoön (Kemiönsaari), Southwest Finland, Finland

Ixiolite-(Fe2+) is the Fe²⁺‑dominant member of the Ixiolite Group and of the Ixiolite-(Mn2+)-Ixiolite-(Fe2+) series, with the ideal end‑member formula (Ta₂/₃Fe²⁺₁/₃)O₂.

Ixiolite (sensu lacto) was first described as a tantalum oxide, with subordinate Fe and Mn and minor Sn by Nordenskiöld (1857). The chemical analysis was however incomplete, the Mn:Fe ratio was not determined. At the type locality, Skogsböle in Finland, ixiolite occurs with both Fe > Mn and Mn > Fe compositions.

Nickel et al. (1963) investigated the crystal structure of an ixiolite sample from Skogsböle. Structurally, ixiolite (sensu stricto) can be regarded as a disordered form of columbite.

In 2022, the IMA redefined the ixiolite into two distinct species, ixiolite-(Fe2+) and ixiolite-(Mn2+).
The sample investigated Nickel et al. (1963) corresponds, after the redefinition to a Fe²⁺-dominant ixiolite.

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Unique IdentifiersHide

Mindat ID:

56147

Long-form identifier:

mindat:1:1:56147:3

Similar NamesHide

Ixiolite-(Mn2+)	A valid IMA mineral species	(Ta_0.67Mn²⁺_0.33)O₂
Ixiolite-(Mn2+)-Ixiolite-(Fe2+) Series	A solid-solution series between two end-member minerals
Ixiolite-(Sc)	A valid IMA mineral species	(Ta_0.5Sc_0.5)O₂
Ixolite

IMA Classification of Ixiolite-(Fe2+)Hide

IMA status:

Approved

IMA status notes:

Redefined by the IMA

IMA Formula:

(Ta_2/3Fe²⁺_1/3)O₂

Approval year:

2022

First published:

1857

Approval history:

Redefined by IMA in 2022.
The old “ixiolite” was redefined and results now in two distinct mineral species: ixiolite-(Mn2+), with end-member formula (TaMn)O2, and ixiolite-(Fe2+), with end-member formula (TaFe)O2. The type locality for both is Skogsböle, Kimito Island, Finland.

Type description reference:

Nordenskiöld, A. E. (1857) Beitrag zu Finnlands Mineralogie. Annalen der Physik und Chemie, 177. 625-642 doi:10.1002/andp.18571770807

Classification of Ixiolite-(Fe2+)Hide

Strunz-mindat (2026):

4.DB.25

4 : OXIDES (Hydroxides, V[5,6] vanadates, arsenites, antimonites, bismuthites, sulfites, selenites, tellurites, iodates)
D : Metal: Oxygen = 1:2 and similar
B : With medium-sized cations; chains of edge-sharing octahedra

Mineral SymbolsHide

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
Ix-Fe2+	IMA–CNMNC	Warr, L.N. (2021). IMA–CNMNC approved mineral symbols. Mineralogical Magazine, 85(3), 291-320. doi:10.1180/mgm.2021.43

Chemistry of Ixiolite-(Fe2+)Hide

Mindat Formula:

(Ta_0.67Fe²⁺_0.33)O₂

Element Weights:

Element	% weight
Ta	70.624 %
O	18.641 %
Fe	10.736 %

Calculated from ideal end-member formula.

Elements listed:

Fe, O, Ta - search for minerals with similar chemistry

Crystallography of Ixiolite-(Fe2+)Hide

Crystal System:

Orthorhombic

Class (H-M):

mmm(2/m2/m2/m) - Dipyramidal

Space Group:

Pbcn

Cell Parameters:

a = 4.785 Å, b = 5.758 Å, c = 5.160 Å

Ratio:

a:b:c = 0.831 : 1 : 0.896

Unit Cell V:

142.17 Å³ (Calculated from Unit Cell)

Morphology:

a = 4.785 Å, b = 5.758 Å, c = 5.160 Å

Comment:

Nickel et al. (1963) give space group Pcan (non-standard setting) and unit-cell parameters a = 5.731, b = 4.742, c = 5.152 Å. Grice et al. (1976) give space group Pbcn (non-standard setting) and the unit-cell parameters a = 4.785, b = 5.758, c = 5.160 Å (used above). Heating usually produces an ordered wodginite-type structure.

Type Occurrence of Ixiolite-(Fe2+)Hide

Type Locality:

ⓘ Skogsböle (Skogböle), Kimitoön Island, Kimitoön (Kemiönsaari), Southwest Finland, Finland

Place of Conservation of Type Material:

In the Royal Ontario Museum with the catalogue number M-6591 (sample investigated by Nickel et al.,1963).

Geological Setting of Type Material:

Granite pegmatite

Reference:

Nordenskiöld, A. E. (1857) Beitrag zu Finnlands Mineralogie. Annalen der Physik und Chemie, 177. 625-642 doi:10.1002/andp.18571770807

Other Language Names for Ixiolite-(Fe2+)Hide

Dutch:Ixioliet-(Fe2+)

German:Ixiolith-(Fe2+)

Norwegian:Ixiolitt-(Fe2+)

Relationship of Ixiolite-(Fe2+) to other SpeciesHide

Member of:

Ixiolite Group > Columbite Supergroup

Other Members of Ixiolite Group:

Ixiolite-(Mn2+)	(Ta_0.67Mn²⁺_0.33)O₂	Orth. mmm(2/m2/m2/m) : Pbcn
Ixiolite-(Sc)	(Ta_0.5Sc_0.5)O₂	Orth. mmm(2/m2/m2/m) : Pbcn
Nioboixiolite-(Fe2+)	(Nb_0.67Fe²⁺_0.33)O₂	Orth. mmm(2/m2/m2/m) : Pbcn
Nioboixiolite-(Fe3+)	(Nb_0.5Fe³⁺_0.5)O₂	Orth. mmm(2/m2/m2/m) : Pbcn
Nioboixiolite-(Mn2+)	(Nb_0.67Mn²⁺_0.33)O₂	Orth. mmm(2/m2/m2/m) : Pbcn
Nioboixiolite-([])	(Nb_0.8◻_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

Forms a series with:

Ixiolite-(Mn2+)

Ixiolite-(Mn2+)-Ixiolite-(Fe2+) Series

Related Minerals - Strunz-mindat Grouping Hide

4.DB.	Tianhongqiite	CrTiO₃(OH)	Mon. 2/m
4.DB.	Nioboheftetjernite	ScNbO₄	Mon. 2/m : P2₁/b
4.DB.	Huangshanite	Fe³⁺TaO₄	Mon. 2/m : P2/b
4.DB.	Nioboixiolite-(Mn2+)	(Nb_0.67Mn²⁺_0.33)O₂	Orth. mmm(2/m2/m2/m) : Pbcn
4.DB.	Shakhdaraite-(Y)	ScYNb₂O₈	Mon. 2/m : P2/b
4.DB.05	Varlamoffite	Sn_1-xFe_xO_2-x(OH)
4.DB.05	Argutite	GeO₂	Tet. 4/mmm(4/m2/m2/m) : P4₂/mnm
4.DB.05	Cassiterite	SnO₂	Tet. 4/mmm(4/m2/m2/m) : P4₂/mnm
4.DB.05	Rutile	TiO₂	Tet. 4/mmm(4/m2/m2/m) : P4₂/mnm
4.DB.05	Plattnerite	PbO₂	Tet. 4/mmm(4/m2/m2/m) : P4₂/mnm
4.DB.05	Tripuhyite	Fe³⁺Sb⁵⁺O₄	Tet. 4/mmm(4/m2/m2/m) : P4₂/mnm
4.DB.05	Tugarinovite	MoO₂	Mon. 2/m : P2₁/b
4.DB.05	Pyrolusite	Mn⁴⁺O₂	Tet. 4/mmm(4/m2/m2/m) : P4₂/mnm
4.DB.10	Byströmite	MgSb₂O₆	Tet. 4/mmm(4/m2/m2/m) : P4/nmm
4.DB.10	Ordoñezite	ZnSb₂O₆	Tet. 4/mmm(4/m2/m2/m) : P4₂/mnm
4.DB.10	Tredouxite	NiSb₂O₆	Tet. 4/mmm(4/m2/m2/m) : P4₂/mnm
4.DB.10	Tapiolite-(Mn)	Mn²⁺Ta₂O₆	Tet. 4/mmm(4/m2/m2/m) : P4₂/mnm
4.DB.10	Tapiolite-(Fe)	Fe²⁺Ta₂O₆	Tet. 4/mmm(4/m2/m2/m) : P4₂/mnm
4.DB.15a	Paramontroseite	V⁴⁺O₂	Orth. mmm(2/m2/m2/m)
4.DB.15a	Ramsdellite	Mn⁴⁺O₂	Orth. mmm(2/m2/m2/m)
4.DB.15b	Akhtenskite	ε-Mn⁴⁺O₂	Hex. 6/mmm(6/m2/m2/m) : P6₃/mmc
4.DB.15c	Nsutite	(Mn⁴⁺,Mn²⁺)(O,OH)₂	Hex.
4.DB.20	Scrutinyite	α-PbO₂	Orth. mmm(2/m2/m2/m) : Pbcn
4.DB.20	Nioboixiolite-([])	(Nb_0.8◻_0.2)⁴⁺O₂	Orth. mmm(2/m2/m2/m) : Pbcn
4.DB.25	Ishikawaite	U⁴⁺Fe²⁺Nb₂O₈	Mon.
4.DB.25	Yttrocolumbite-(Y)	Y(U⁴⁺,Fe²⁺)Nb₂O₈
4.DB.25	Calciosamarskite	(Ca,U⁴⁺)Fe³⁺(Nb,Ta,Ti)₂O₈	Orth. mmm(2/m2/m2/m)
4.DB.25	Samarskite-(Yb)	YbFe³⁺(Nb,Ta)₂O₈	Mon. 2/m : P2/b
4.DB.25	Ixiolite-(Sc)	(Ta_0.5Sc_0.5)O₂	Orth. mmm(2/m2/m2/m) : Pbcn
4.DB.25	Ixiolite-(Mn2+)	(Ta_0.67Mn²⁺_0.33)O₂	Orth. mmm(2/m2/m2/m) : Pbcn
4.DB.25	Nioboixiolite-(Fe2+)	(Nb_0.67Fe²⁺_0.33)O₂	Orth. mmm(2/m2/m2/m) : Pbcn
4.DB.25	Srilankite	TiO₂	Orth. mmm(2/m2/m2/m) : Pbcn
4.DB.25	Samarskite-(Y)	YFe³⁺Nb₂O₈	Mon. 2/m : P2/b
4.DB.25	Nioboixiolite-(Fe3+)	(Nb_0.5Fe³⁺_0.5)O₂	Orth. mmm(2/m2/m2/m) : Pbcn
4.DB.30 va	Wolframite Group
4.DB.30	Rossovskyite	(Fe³⁺,Ta)(Nb,Ti)O₄	Mon. 2/m : P2/b
4.DB.30	Huanzalaite	MgWO₄	Mon. 2/m : P2/b
4.DB.30	Heftetjernite	ScTaO₄	Mon. 2/m : P2/b
4.DB.30	Hübnerite	MnWO₄	Mon. 2/m : P2/b
4.DB.30	Sanmartinite	(Zn,Fe)WO₄	Mon. 2/m : P2₁/b
4.DB.30	Ferberite	FeWO₄	Mon. 2/m : P2/b
4.DB.30	'Krasnoselskite'	CoWO₄	Mon.
4.DB.35	Qitianlingite	(Fe,Mn)₂(Nb,Ta)₂WO₁₀	Orth. mmm(2/m2/m2/m)
4.DB.35	Tantalaeschynite-(Ce)	Ce(TiTa)O₆	Orth. mmm(2/m2/m2/m) : Pnma
4.DB.35	Tantalite-(Mg)	(Mg,Fe²⁺)(Ta,Nb)₂O₆	Orth. mmm(2/m2/m2/m) : Pbcn
4.DB.35	Columbite-(Mn)	Mn²⁺Nb₂O₆	Orth. mmm(2/m2/m2/m) : Pbcn
4.DB.35	Tantalite-(Mn)	Mn²⁺Ta₂O₆	Orth. mmm(2/m2/m2/m) : Pbcn
4.DB.35	Columbite-(Fe)	Fe²⁺Nb₂O₆	Orth. mmm(2/m2/m2/m) : Pbcn
4.DB.35	Columbite-(Mg)	(Mg,Fe,Mn)(Nb,Ta)₂O₆	Orth.
4.DB.35	Tantalite-(Fe)	Fe²⁺Ta₂O₆	Orth. mmm(2/m2/m2/m) : Pbcn
4.DB.40	Ferrotitanowodginite	Fe²⁺TiTa₂O₈	Mon. 2/m : B2/b
4.DB.40	'Wolframowodginite'	Mn(Mn,Sn,Fe,Ta)(W,Ta,Nb)₂O₈
4.DB.40	Lithiotantite	LiTa₃O₈	Mon. 2/m : P2₁/b
4.DB.40	Lithiowodginite	LiTa₃O₈	Mon. 2/m : B2/b
4.DB.40	Titanowodginite	Mn²⁺TiTa₂O₈	Mon. 2/m : B2/b
4.DB.40	Tantalowodginite	(Mn²⁺_0.5◻_0.5)TaTa₂O₈	Mon. 2/m : B2/b
4.DB.40	Wodginite	Mn²⁺Sn⁴⁺Ta₂O₈	Mon. 2/m : B2/b
4.DB.40	Ferrowodginite	Fe²⁺Sn⁴⁺Ta₂O₈	Mon. 2/m : B2/b
4.DB.45	Tivanite	V³⁺TiO₃(OH)	Mon. 2/m : P2₁/b
4.DB.50	Carmichaelite	(Ti,Cr,Fe)[O_2-x(OH)_x]	Mon. 2/m : P2₁/b
4.DB.55	Alumotantite	AlTaO₄	Orth. mmm(2/m2/m2/m) : Pbcn
4.DB.60	Biehlite	((Sb,As)O)₂[MoO₄]	Mon. 2/m : B2/b

Other InformationHide

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-(Fe2+)Hide

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https://www.mindat.org/min-56147.html
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Raman and XRD data at RRUFF project

References and PDF downloads at RRUFF project

American Mineralogist Crystal Structure Database

Mineral Dealers:

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References for Ixiolite-(Fe2+)Hide

Reference List:

Nordenskiöld, A. E. (1857) Beitrag zu Finnlands Mineralogie. Annalen der Physik und Chemie, 177. 625-642 doi:10.1002/andp.18571770807

Nickel, E. H., Rowland, J. F., McAdam, R. C. (1963) Ixiolite---a columbite substructure. American Mineralogist, 48 (9-10) 961-979

Miyawaki, Ritsuro, Hatert, Frédéric, Pasero, Marco, Mills, Stuart J. (2022) IMA Commission on New Minerals, Nomenclature and Classification (CNMNC) – Newsletter 68. European Journal of Mineralogy, 34 (5) 385-391 doi:10.5194/ejm-34-385-2022

Chukanov, Nikita V.; Pasero, Marco; Aksenov, Sergey M.; Britvin, Sergey N.; Zubkova, Natalia V.; Yike, Li; Witzke, Thomas (2023) Columbite supergroup of minerals: nomenclature and classification. Mineralogical Magazine, 87 (1). p.18-33. doi:10.1180/mgm.2022.105

Bosi, F.; Hatert, F.; Pasero, M.; Mills, S. J.; Bosi, Ferdinando; Hatert, Frédéric; Pasero, Marco; Mills, Stuart J. (2024) IMA Commission on New Minerals, Nomenclature and Classification (CNMNC) – Newsletter 82. European Journal of Mineralogy, 36 (6). 1005-1010 doi:10.5194/ejm-36-1005-2024

Localities for Ixiolite-(Fe2+)Hide

Showing 1 localities.

This map shows a selection of localities that have latitude and longitude coordinates recorded. Click on the

symbol to view information about a locality. The

symbol next to localities in the list can be used to jump to that position on the map.

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Locality ListHide

- 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). ~~Struck out~~ - Mineral was erroneously reported from this locality. Faded * - Never found at this locality but inferred to have existed at some point in the past (e.g. from pseudomorphs).

All localities listed without proper references should be considered as questionable.

Finland (TL)

Southwest Finland

Kimitoön (Kemiönsaari)

Kimitoön Island

ⓘ Skogsböle (Skogböle) (TL)

Nordenskiöld (1857) +2 other references

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Ixiolite-(Fe2+)

Unique IdentifiersHide

Similar NamesHide

IMA Classification of Ixiolite-(Fe2+)Hide

Classification of Ixiolite-(Fe2+)Hide

Mineral SymbolsHide

Chemistry of Ixiolite-(Fe2+)Hide

Crystallography of Ixiolite-(Fe2+)Hide

Type Occurrence of Ixiolite-(Fe2+)Hide

Other Language Names for Ixiolite-(Fe2+)Hide

Relationship of Ixiolite-(Fe2+) to other SpeciesHide

Related Minerals - Strunz-mindat GroupingHide

Other InformationHide

Internet Links for Ixiolite-(Fe2+)Hide

References for Ixiolite-(Fe2+)Hide

Localities for Ixiolite-(Fe2+)Hide

Locality ListHide

Related Minerals - Strunz-mindat Grouping Hide