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Tapiolite-(Mn)

A valid IMA mineral species
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Formula:
Mn2+Ta2O6
Colour:
Dark brown
Lustre:
Sub-Adamantine, Metallic, Sub-Metallic
Hardness:
6 - 6½
Specific Gravity:
7.72 (Calculated)
Crystal System:
Tetragonal
Member of:
Tapiolite Group
Name:
Named manganotapiolite in 1983 for its compositional relationship to ferrotapiolite. Renamed to tapiolite-(Mn) in 2008.
Isostructural with:
Tapiolite-(Fe)
Tapiolite-(Fe)-Tapiolite-(Mn) Series.


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Unique IdentifiersHide

Mindat ID:
2523
Long-form identifier:
mindat:1:1:2523:8

Similar NamesHide

Tapiolite(Fe,Mn)(Ta,Nb)2O6
Tapiolite-(Fe)A valid IMA mineral species - grandfatheredFe2+Ta2O6
Tapiolite-(Fe)-Tapiolite-(Mn) SeriesA solid-solution series between two end-member minerals

IMA Classification of Tapiolite-(Mn)Hide

Classification of Tapiolite-(Mn)Hide

Strunz-mindat (2026):
4.DB.10

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
Dana 8th ed.:
8.3.1.2

8 : MULTIPLE OXIDES CONTAINING NIOBIUM,TANTALUM OR TITANIUM
3 : AB2O6
Hey's CIM Ref.:
18.1.38

18 : Niobates and Tantalates
1 : Niobates and tantalates containing neither rare earths nor U

Mineral SymbolsHide

As of 2021 there are now IMA–CNMNC approved mineral symbols (abbreviations) for each mineral species, useful for tables and diagrams.

Please only use the official IMA–CNMNC symbol. Older variants are listed for historical use only.

SymbolSourceReference for Standard
Tap-MnIMA–CNMNCWarr, L.N. (2021). IMA–CNMNC approved mineral symbols. Mineralogical Magazine, 85(3), 291-320. doi:10.1180/mgm.2021.43
TapThe Canadian Mineralogist (2019)The Canadian Mineralogist (2019) The Canadian Mineralogist list of symbols for rock- and ore-forming minerals (December 30, 2019). download

Physical Properties of Tapiolite-(Mn)Hide

Lustre:
Sub-Adamantine, Metallic, Sub-Metallic
Transparency:
Opaque
Colour:
Dark brown
Streak:
Dark brown
Hardness:
6 - 6½ on Mohs scale
Hardness:
VHN100=711 kg/mm2 - Vickers
Tenacity:
Brittle
Cleavage:
None Observed
Fracture:
Irregular/Uneven, Splintery
Density:
7.72 g/cm3 (Calculated)

Optical Data of Tapiolite-(Mn)Hide

Type:
Uniaxial
Anisotropism:
Weak
Optical Extinction:
Parallel
Colour in reflected light:
Gray
Internal Reflections:
strong red-brown

Chemistry of Tapiolite-(Mn)Hide

Mindat Formula:
Mn2+Ta2O6
Element Weights:
Element% weight
Ta70.568 %
O18.719 %
Mn10.713 %

Calculated from ideal end-member formula.
Ta
O
Mn
Elements listed:
Mn, O, Ta - search for minerals with similar chemistry

Crystallography of Tapiolite-(Mn)Hide

Crystal System:
Tetragonal
Class (H-M):
4/mmm(4/m2/m2/m) - Ditetragonal Dipyramidal
Space Group:
P42/mnm
Cell Parameters:
a = 4.762 Å, c = 9.272 Å
Ratio:
a:c = 1 : 1.947
Unit Cell V:
210.26 ų (Calculated from Unit Cell)
Z:
2
Morphology:
Nearly equant to short prismatic.
Twinning:
Twinning is not mentioned in the original description, but may be present.

X-Ray Powder DiffractionHide

Powder Diffraction Data:
d-spacingIntensity
4.24 Å(40)
3.37 Å(100)
2.59 Å(90)
2.38 Å(60)
1.75 Å(90)
1.68 Å(60)
1.50 Å(40)
1.41 Å(40)
Comments:
ICDD 35-626

Geological EnvironmentHide

Paragenetic Mode(s):
Paragenetic ModeEarliest Age (Ga)
Stage 4b: Highly evolved igneous rocks>3.0
34 : Complex granite pegmatites
Geological Setting:
Granite pegmatite.

Type Occurrence of Tapiolite-(Mn)Hide

Synonyms of Tapiolite-(Mn)Hide

Other Language Names for Tapiolite-(Mn)Hide

Relationship of Tapiolite-(Mn) to other SpeciesHide

Member of:
Tapiolite Group
Other Members of Tapiolite Group:
Tapiolite-(Fe)Fe2+Ta2O6Tet. 4/mmm(4/m2/m2/m) : P42/mnm
Forms a series with:
Tapiolite-(Fe)Tapiolite-(Fe)-Tapiolite-(Mn) Series

Related Minerals - Strunz-mindat GroupingHide

4.DB.TianhongqiiteCrTiO3(OH)Mon. 2/m
4.DB.NioboheftetjerniteScNbO4Mon. 2/m : P21/b
4.DB.HuangshaniteFe3+TaO4Mon. 2/m : P2/b
4.DB.Nioboixiolite-(Mn2+)(Nb0.67Mn2+0.33)O2Orth. mmm(2/m2/m2/m) : Pbcn
4.DB.Shakhdaraite-(Y)ScYNb2O8Mon. 2/m : P2/b
4.DB.05VarlamoffiteSn1-xFexO2-x(OH)
4.DB.05ArgutiteGeO2Tet. 4/mmm(4/m2/m2/m) : P42/mnm
4.DB.05CassiteriteSnO2Tet. 4/mmm(4/m2/m2/m) : P42/mnm
4.DB.05RutileTiO2Tet. 4/mmm(4/m2/m2/m) : P42/mnm
4.DB.05PlattneritePbO2Tet. 4/mmm(4/m2/m2/m) : P42/mnm
4.DB.05TripuhyiteFe3+Sb5+O4Tet. 4/mmm(4/m2/m2/m) : P42/mnm
4.DB.05TugarinoviteMoO2Mon. 2/m : P21/b
4.DB.05PyrolusiteMn4+O2Tet. 4/mmm(4/m2/m2/m) : P42/mnm
4.DB.10ByströmiteMgSb2O6Tet. 4/mmm(4/m2/m2/m) : P4/nmm
4.DB.10OrdoñeziteZnSb2O6Tet. 4/mmm(4/m2/m2/m) : P42/mnm
4.DB.10TredouxiteNiSb2O6Tet. 4/mmm(4/m2/m2/m) : P42/mnm
4.DB.10Tapiolite-(Fe)Fe2+Ta2O6Tet. 4/mmm(4/m2/m2/m) : P42/mnm
4.DB.15aParamontroseiteV4+O2Orth. mmm(2/m2/m2/m)
4.DB.15aRamsdelliteMn4+O2Orth. mmm(2/m2/m2/m)
4.DB.15bAkhtenskiteε-Mn4+O2Hex. 6/mmm(6/m2/m2/m) : P63/mmc
4.DB.15cNsutite(Mn4+,Mn2+)(O,OH)2Hex.
4.DB.20Scrutinyiteα-PbO2Orth. mmm(2/m2/m2/m) : Pbcn
4.DB.20Nioboixiolite-([])(Nb0.8◻0.2)4+O2Orth. mmm(2/m2/m2/m) : Pbcn
4.DB.25IshikawaiteU4+Fe2+Nb2O8Mon.
4.DB.25Yttrocolumbite-(Y)Y(U4+,Fe2+)Nb2O8
4.DB.25Calciosamarskite(Ca,U4+)Fe3+(Nb,Ta,Ti)2O8Orth. mmm(2/m2/m2/m)
4.DB.25Samarskite-(Yb)YbFe3+(Nb,Ta)2O8Mon. 2/m : P2/b
4.DB.25Ixiolite-(Sc)(Ta0.5Sc0.5)O2Orth. mmm(2/m2/m2/m) : Pbcn
4.DB.25Ixiolite-(Fe2+)(Ta0.67Fe2+0.33)O2Orth. mmm(2/m2/m2/m) : Pbcn
4.DB.25Ixiolite-(Mn2+)(Ta0.67Mn2+0.33)O2Orth. mmm(2/m2/m2/m) : Pbcn
4.DB.25Nioboixiolite-(Fe2+)(Nb0.67Fe2+0.33)O2Orth. mmm(2/m2/m2/m) : Pbcn
4.DB.25SrilankiteTiO2Orth. mmm(2/m2/m2/m) : Pbcn
4.DB.25Samarskite-(Y)YFe3+Nb2O8Mon. 2/m : P2/b
4.DB.25Nioboixiolite-(Fe3+)(Nb0.5Fe3+0.5)O2Orth. mmm(2/m2/m2/m) : Pbcn
4.DB.30 vaWolframite Group
4.DB.30Rossovskyite(Fe3+,Ta)(Nb,Ti)O4Mon. 2/m : P2/b
4.DB.30HuanzalaiteMgWO4Mon. 2/m : P2/b
4.DB.30HeftetjerniteScTaO4Mon. 2/m : P2/b
4.DB.30HübneriteMnWO4Mon. 2/m : P2/b
4.DB.30Sanmartinite(Zn,Fe)WO4Mon. 2/m : P21/b
4.DB.30FerberiteFeWO4Mon. 2/m : P2/b
4.DB.30'Krasnoselskite'CoWO4Mon.
4.DB.35Qitianlingite(Fe,Mn)2(Nb,Ta)2WO10Orth. mmm(2/m2/m2/m)
4.DB.35Tantalaeschynite-(Ce)Ce(TiTa)O6Orth. mmm(2/m2/m2/m) : Pnma
4.DB.35Tantalite-(Mg)(Mg,Fe2+)(Ta,Nb)2O6Orth. mmm(2/m2/m2/m) : Pbcn
4.DB.35Columbite-(Mn)Mn2+Nb2O6Orth. mmm(2/m2/m2/m) : Pbcn
4.DB.35Tantalite-(Mn)Mn2+Ta2O6Orth. mmm(2/m2/m2/m) : Pbcn
4.DB.35Columbite-(Fe)Fe2+Nb2O6Orth. mmm(2/m2/m2/m) : Pbcn
4.DB.35Columbite-(Mg)(Mg,Fe,Mn)(Nb,Ta)2O6Orth.
4.DB.35Tantalite-(Fe)Fe2+Ta2O6Orth. mmm(2/m2/m2/m) : Pbcn
4.DB.40FerrotitanowodginiteFe2+TiTa2O8Mon. 2/m : B2/b
4.DB.40'Wolframowodginite'Mn(Mn,Sn,Fe,Ta)(W,Ta,Nb)2O8
4.DB.40LithiotantiteLiTa3O8Mon. 2/m : P21/b
4.DB.40LithiowodginiteLiTa3O8Mon. 2/m : B2/b
4.DB.40TitanowodginiteMn2+TiTa2O8Mon. 2/m : B2/b
4.DB.40Tantalowodginite(Mn2+0.5◻0.5)TaTa2O8Mon. 2/m : B2/b
4.DB.40WodginiteMn2+Sn4+Ta2O8Mon. 2/m : B2/b
4.DB.40FerrowodginiteFe2+Sn4+Ta2O8Mon. 2/m : B2/b
4.DB.45TivaniteV3+TiO3(OH)Mon. 2/m : P21/b
4.DB.50Carmichaelite(Ti,Cr,Fe)[O2-x(OH)x]Mon. 2/m : P21/b
4.DB.55AlumotantiteAlTaO4Orth. mmm(2/m2/m2/m) : Pbcn
4.DB.60Biehlite((Sb,As)O)2[MoO4]Mon. 2/m : B2/b

Fluorescence of Tapiolite-(Mn)Hide

In UV light:
Not fluorescent.

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.
Industrial Uses:
Known in only a very few specimens. Compositionally zoned.

Internet Links for Tapiolite-(Mn)Hide

References for Tapiolite-(Mn)Hide

Localities for Tapiolite-(Mn)Hide

Showing 3 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