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Innsbruckite

A valid IMA mineral species
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01962690017272472264562.jpg
Innsbruckite

Innsbruckite occurrence, Staffelsee, Navis, Innsbruck-Land District, Tyrol, Austria
00431740017272265742095.jpg
Innsbruckite, etc.

Innsbruckite occurrence, Staffelsee, Navis, Innsbruck-Land District, Tyrol, Austria
05097480017272265749345.jpg
Innsbruckite, etc.

Innsbruckite occurrence, Staffelsee, Navis, Innsbruck-Land District, Tyrol, Austria
07805420017272325414387.jpg
Innsbruckite

Innsbruckite occurrence, Staffelsee, Navis, Innsbruck-Land District, Tyrol, Austria
05337790017272472277795.jpg
Innsbruckite, etc.

Innsbruckite occurrence, Staffelsee, Navis, Innsbruck-Land District, Tyrol, Austria
00440490017272472286223.jpg
Innsbruckite, etc.

Innsbruckite occurrence, Staffelsee, Navis, Innsbruck-Land District, Tyrol, Austria
07805420017272325414387.jpg
Innsbruckite

Innsbruckite occurrence, Staffelsee, Navis, Innsbruck-Land District, Tyrol, Austria
00431740017272265742095.jpg
Innsbruckite, etc.

Innsbruckite occurrence, Staffelsee, Navis, Innsbruck-Land District, Tyrol, Austria
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About InnsbruckiteHide

09189950017656571004961.jpg
Innsbruck

Innsbruck, Tyrol, Austria
Formula:
Mn33(Si2O5)14(OH)38
Colour:
Pale brownish (no colour stated in original description; inferred from similarity to bementite), nearly colourless in transmitted light (thin section).
Hardness:
6
Specific Gravity:
3.216 (Calculated)
Crystal System:
Monoclinic
Name:
Named for the type locality, found at a location 20 km south-east of Innsbruck, Austria.
Innsbruckite belongs to the group of modulated 1:1 layer silicates and is chemically and structurally closely related to bementite.

Raman spectroscopy or diffraction techniques are required to differentiate between bementite and innsbruckite (Krüger et al., 2014).


Unique IdentifiersHide

Mindat ID:
43903
Long-form identifier:
mindat:1:1:43903:1

IMA Classification of InnsbruckiteHide

IMA status:
Approved
IMA Formula:
Mn2+33(Si2O5)14(OH)38
Approval year:
2013

Classification of InnsbruckiteHide

Strunz-mindat (2026):
9.EE.07

9 : SILICATES (Germanates)
E : Phyllosilicates
E : Single tetrahedral nets of 6-membered rings connected by octahedral nets or octahedral bands

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
IbkIMA–CNMNCWarr, L.N. (2021). IMA–CNMNC approved mineral symbols. Mineralogical Magazine, 85(3), 291-320. doi:10.1180/mgm.2021.43
IbkWarr (2020)Warr, L.N. (2020) Recommended abbreviations for the names of clay minerals and associated phases. Clay Minerals, 55, 261–264 doi:10.1180/clm.2020.30

Physical Properties of InnsbruckiteHide

Colour:
Pale brownish (no colour stated in original description; inferred from similarity to bementite), nearly colourless in transmitted light (thin section).
Hardness:
6 on Mohs scale
Hardness:
VHN100=740(50) - Vickers
Density:
3.216 g/cm3 (Calculated)

Optical Data of InnsbruckiteHide

Type:
Biaxial (-)
Comments:
Gladstone-Dale average refractive index of 1.678 was calculated

Chemistry of InnsbruckiteHide

Mindat Formula:
Mn33(Si2O5)14(OH)38
Element Weights:
Element% weight
Mn41.528 %
O39.581 %
Si18.014 %
H0.877 %

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

Crystallography of InnsbruckiteHide

Crystal System:
Monoclinic
Class (H-M):
m - Domatic
Space Group:
Bm
Setting:
Cm
Cell Parameters:
a = 17.276(2) Å, b = 35.957(5) Å, c = 7.2560(8) Å
β = 91.359(7)°, γ = °
Ratio:
a:b:c = 0.48 : 1 : 0.202
Unit Cell V:
4506.1 ų
Z:
2

X-Ray Powder DiffractionHide

Powder Diffraction Data:
d-spacingIntensity
7.254 Å(100)
3.627 Å(29)
3.549 Å(15)
3.516 Å(16)
2.657 Å(77)
2.654 Å(44)
2.250 Å(32)
1.655 Å(19)
Locality:
Innsbruckite occurrence, Staffelsee, Navis, Innsbruck-Land District, Tyrol, Austria
Comments:
From Type Description.
Very similar to pattern of bementite.

Geological EnvironmentHide

Paragenetic Mode(s):
Paragenetic ModeEarliest Age (Ga)
High-? alteration and/or metamorphism
32 : Ba/Mn/Pb/Zn deposits, including metamorphic deposits
Stage 7: Great Oxidation Event<2.4
47a : [Near-surface hydration of prior minerals]
47e : [Vanadates, chromates, manganates]

Type Occurrence of InnsbruckiteHide

Type Locality:
ⓘ Innsbruckite occurrence, Staffelsee, Navis, Innsbruck-Land District, Tyrol, Austria
General Appearance of Type Material:
thin platy crystals
Place of Conservation of Type Material:
Type material is deposited in the collections of the Naturhistorisches Museum Wien, Vienna, Austria, registration number N9580
Geological Setting of Type Material:
interface between a serpentinite body and cherts
Associated Minerals at Type Locality:
'Apatite'BaryteCalciteFriedeliteRhodochrosite
SpessartineTephroite

Synonyms of InnsbruckiteHide

Other Language Names for InnsbruckiteHide

Common AssociatesHide

Associations Based on Photo Data:
2 photos of Innsbruckite associated with RhodochrositeMnCO3

Related Minerals - Strunz-mindat GroupingHide

9.EE.CairncrossiteSr2Ca7-xNa2x(Si4O10)4(OH)2(H2O)15-xTric. 1 : P1
9.EE.05BementiteMn7Si6O15(OH)8Mon.
9.EE.10'Brokenhillite'Mn8Si6O15(OH)10Hex. 6mm : P63mc
9.EE.10Mcgillite(Mn,Fe)8Si6O15(OH)8Cl2Mon. 2/m : B2/m
9.EE.10FriedeliteMn2+8Si6O15(OH,Cl)10Mon. 2/m : B2/m
9.EE.10Pyrosmalite-(Mn)Mn2+8Si6O15(OH,Cl)10Trig. 3m(32/m) : P3m1
9.EE.10Pyrosmalite-(Fe)Fe2+8Si6O15(OH,Cl)10Trig. 3m(32/m) : P3m1
9.EE.15NeleniteMn2+16As3+3Si12O36(OH)17Trig. 3m(32/m) : R3m
9.EE.15SchalleriteMn2+16As3Si12O36(OH)17Trig. 3m : P3m1
9.EE.20Palygorskite◻Al2Mg2◻2Si8O20(OH)2(H2O)4 · 4H2OMon. 2/m : B2/m
9.EE.20YofortieriteMn2+Mn2+2Mn2+2◻2Si8O20(OH)2(H2O)4 · 4H2OMon. 2/m : B2/m
9.EE.20WindhoekiteFe3+(Fe3+1.67◻0.33)Ca2◻2Si8O20(OH)2(H2O)4(OH)2 · 6H2OMon. 2/m : B2/m
9.EE.20Windmountainite◻Fe3+2Mg2◻2Si8O20(OH)2(H2O)4 · 4H2OMon. 2/m : B2/m
9.EE.20IkorskyiteKMn3+(Si4O10) · 3H2OMon. 2/m : P21/b
9.EE.20TuperssuatsiaiteFe3+Fe3+2(Na◻)◻2Si8O20(OH)2(H2O)4 · 2H2OMon. 2/m : B2/m
9.EE.20'Unnamed (Na-Ca-Fe-Silicate-Hydrate)'NaCa(Fe2+,Al,Mn)5[Si8O19(OH)](OH)7 · 5H2OTric. 1 : P1
9.EE.25SepioliteMg4(Si6O15)(OH)2 · 6H2OOrth. mmm(2/m2/m2/m) : Pnna
9.EE.25LoughliniteNa2Mg3Si6O16 · 8H2OOrth. mmm(2/m2/m2/m)
9.EE.25Falcondoite(Ni,Mg)4Si6O15(OH)2 · 6H2OOrth.
9.EE.25Kalifersite(K,Na)5Fe3+7Si20O50(OH)6 · 12H2OTric. 1 : P1
9.EE.30OrlymaniteCa4Mn3Si8O20(OH)6 · 2H2OHex.
9.EE.30TungusiteCa4Fe2Si6O15(OH)6Tric. 1 : P1
9.EE.30GyroliteNaCa16Si23AlO60(OH)8 · 14H2OTric. 1 : P1
9.EE.35Reyerite(Na,K)2Ca14(Si,Al)24O58(OH)8 · 6H2OTrig. 3 : P3
9.EE.35KodamaiteNa3(Ca5Na)Si16O36(OH)4F2 · (14-x)H2OTric. 1 : P1
9.EE.35Truscottite(Ca,Mn)14Si24O58(OH)8 · 2H2OTrig.
9.EE.40NatrosiliteNa2Si2O5Mon. 2/m : P21/b
9.EE.45MakatiteNa2Si4O8(OH)2 · 4H2OMon. 2/m : P21/b
9.EE.50VarennesiteNa8Mn2Si10O25(OH,Cl)2 · 12H2OOrth. mmm(2/m2/m2/m) : Cmcm
9.EE.55RaiteMn2+Mn2+2Na2(◻1.75Ti0.25)Si8O20(OH)2(H2O)4 · Na(H2O)6Orth. 222 : C222
9.EE.60IntersiliteNa6Mn2+Ti[Si10O24(OH)](OH)3 · 4H2OMon.
9.EE.65ZakharoviteNa4Mn5Si10O24(OH)6 · 6H2OTrig. 3m
9.EE.65ShafranovskiteNa3K2(Mn,Fe,Na)4[Si9(O,OH)27](OH)2 · nH2OTrig. 3m : P31c
9.EE.70ZeophylliteCa13Si10O28(OH)2F8 · 6H2OTrig. 3 : R3
9.EE.75Minehillite(K,Na)2-3Ca28Zn4Al4Si40O112(OH)16Hex.
9.EE.80Fedorite(Na,K)2-3(Ca4Na3)Si16O38(OH,F)2 · 3.5H2OTric. 1 : P1
9.EE.80Martinite(Na,◻,Ca)12Ca4(Si,S,B)14B2O38(OH,Cl)2F2 · 4H2OTric. 1 : P1
9.EE.80EllingseniteNa5Ca6Si18O38(OH)13 · 6H2OTric. 1 : P1
9.EE.85Lalondeite(Na,Ca)6(Ca,Na)3Si16O38(F,OH)2 · 3H2OTric. 1 : P1

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 InnsbruckiteHide

References for InnsbruckiteHide

Localities for InnsbruckiteHide

Showing 2 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.
Austria (TL)
 
  • Tyrol
    • Innsbruck-Land District
      • Navis
        • Staffelsee
Williams et al. (2013) +4 other references
      • Trins
Kolitsch et al. (2021)
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