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Tamaite

A valid IMA mineral species
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About TamaiteHide

Formula:
(Ca,K,Na)xMn6(Si,Al)10O24(OH)4 · nH2O (x = 1-2; n = 7-11)
Previously given as (Ca,K,Ba,Na)3-4Mn24(Si,Al)40(O,OH)112 · 21H2O.
Colour:
Colourless to pale yellowish brown
Lustre:
Vitreous, Pearly
Hardness:
4
Specific Gravity:
2.85
Crystal System:
Monoclinic
Name:
For the type locality, the Shiromaru Mine, Okutama, Tama District, Tokyo, Japan.
Ganophyllite Group. A very similar (or identical?) phase is known as UM1990-61-SiO:AlCaHKMnNa.


Unique IdentifiersHide

Mindat ID:
7080
Long-form identifier:
mindat:1:1:7080:1

Similar NamesHide

DamiaoiteA valid IMA mineral speciesPtIn2
DomiteA rock subtype
TamaniteA synonym of Anapaite
Tamarite (of Brooke and Miller)A synonym of Chalcophyllite
Tamarite (of Ford)A synonym of Taramite Root Name Group
TamboiteA valid IMA mineral speciesFe33+(OH)(H2O)2(SO4)(Te4+O3)3(Te4+O(OH)2)(H2O)3
TomaiteA synonym of Johntomaite
TumiteA synonym of 'Axinite'
VamaiteA synonym of 'Schraufite'

IMA Classification of TamaiteHide

Classification of TamaiteHide

9.EG.30

9 : SILICATES (Germanates)
E : Phyllosilicates
G : Double nets with 6-membered and larger rings

Mineral SymbolsHide

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

SymbolSourceReference for Standard
TamIMA–CNMNCWarr, L.N. (2021). IMA–CNMNC approved mineral symbols. Mineralogical Magazine, 85(3), 291-320. doi:10.1180/mgm.2021.43

Physical Properties of TamaiteHide

Vitreous, Pearly
Transparency:
Transparent
Colour:
Colourless to pale yellowish brown
Streak:
White
Hardness:
Comment:
Parallel to cleavage
Cleavage:
Perfect
{001} perfect
Density:
2.85(5) g/cm3 (Measured)    2.83 g/cm3 (Calculated)

Optical Data of TamaiteHide

Type:
Biaxial (-)
Dispersion:
r < v slight
Comments:
Interference colors resemble those of muscovite.

Chemistry of TamaiteHide

Mindat Formula:
(Ca,K,Na)xMn6(Si,Al)10O24(OH)4 · nH2O (x = 1-2; n = 7-11)

Previously given as (Ca,K,Ba,Na)3-4Mn24(Si,Al)40(O,OH)112 · 21H2O.
Element Weights:
Element% weight
O44.965 %
Mn27.861 %
Si23.739 %
Ca2.541 %
H0.895 %

Calculated from ideal end-member formula.
O
Mn
Si
Ca
H

Crystallography of TamaiteHide

Crystal System:
Monoclinic
Class (H-M):
2/m - Prismatic
Space Group:
P21/b
Setting:
P21/a
Cell Parameters:
a = 16.64(1) Å, b = 27.11(2) Å, c = 25.35(2) Å
β = 98.74(7)°
Ratio:
a:b:c = 0.614 : 1 : 0.935
Unit Cell V:
11,302.86 ų (Calculated from Unit Cell)
Z:
4

Crystal StructureHide

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IDSpeciesReferenceLinkYearLocalityPressure (GPa)Temp (K)
0003154TamaiteHughes J M, Rakovan J F, Bracco R, Gunter M E (2003) The atomic arrangemetn of the ganophyllite-group modulated layer silicates as determined from the orthorhombic dimorph of tamaite, with the elusive 16.8 A ganophyllite-group superstructure revealed American Mineralogist 88 1324-133020030293
CIF Raw Data - click here to close

X-Ray Powder DiffractionHide

Powder Diffraction Data:
d-spacingIntensity
12.6 Å(vvs)
2.69 Å(vs)
3.13 Å(s)
2.84 Å(s)
2.60 Å(s)
2.46 Å(s)
3.46 Å(m)

Geological EnvironmentHide

Paragenetic Mode(s):
Paragenetic ModeEarliest Age (Ga)
High-? alteration and/or metamorphism
32 : Ba/Mn/Pb/Zn deposits, including metamorphic deposits

Type Occurrence of TamaiteHide

General Appearance of Type Material:
Micaeous aggregates. Veinlets up to 1.5 mm thick, composed of platy crystals under 0.5 mm in diameter.
Place of Conservation of Type Material:
National Science Museum, Tokyo, Japan, NSM-M 27936.
Geological Setting of Type Material:
Weakly metamorphosed manganese deposit.
Associated Minerals at Type Locality:

Synonyms of TamaiteHide

Other Language Names for TamaiteHide

Dutch:Tamaiet
German:Tamait
Japanese:多摩石
Russian:Тамаит
Simplified Chinese:塔玛水硅锰钙石
Spanish:Tamaita
Traditional Chinese:塔瑪水矽錳鈣石

Relationship of Tamaite to other SpeciesHide

Other Members of Ganophyllite Group:
Eggletonite(Na,K,Ca)xMn6(Si,Al)10O24(OH)4 · nH2O (x = 1-2; n = 7-11)Mon.
Ganophyllite(K,Na)xMn2+6(Si,Al)10O24(OH)4 · nH2O (x = 1-2; n = 7-11)Mon. 2/m

Common AssociatesHide

Associations Based on Photo Data:
2 photos of Tamaite associated with InesiteCa2(Mn,Fe)7Si10O28(OH)2 · 5H2O
1 photo of Tamaite associated with Eggletonite(Na,K,Ca)xMn6(Si,Al)10O24(OH)4 · nH2O (x = 1-2; n = 7-11)
1 photo of Tamaite associated with Ganophyllite(K,Na)xMn2+6(Si,Al)10O24(OH)4 · nH2O (x = 1-2; n = 7-11)

Related Minerals - Strunz-mindat GroupingHide

9.EG.05CymriteBaAl2Si2(O,OH)8 · H2OMon. 2 : P21
9.EG.10Naujakasite(Na,K)6(Fe2+,Mn2+,Ca)(Al,Fe)4Si8O26Mon.
9.EG.10ManganonaujakasiteNa6(Mn2+,Fe2+)Al4Si8O26Mon. 2/m : B2/m
9.EG.15DmisteinbergiteCa(Al2Si2O8)Trig. 32 : P312
9.EG.20KampfiteBa12(Si11Al5)O31(CO3)8Cl5Mon. m
9.EG.25VertumniteCa4Al4Si4O6(OH)24 · 3H2OMon. 2/m : P21/m
9.EG.25SträtlingiteCa2Al2SiO7 · 8H2OTrig. 3m : R3m
9.EG.30Eggletonite(Na,K,Ca)xMn6(Si,Al)10O24(OH)4 · nH2O (x = 1-2; n = 7-11)Mon.
9.EG.30Ganophyllite(K,Na)xMn2+6(Si,Al)10O24(OH)4 · nH2O (x = 1-2; n = 7-11)Mon. 2/m
9.EG.35ZussmaniteK(Fe,Mg,Mn)13(Si,Al)18O42(OH)14Trig. 3 : R3
9.EG.35CoombsiteKMn2+13(Si,Al)18O42(OH)14Trig.
9.EG.40'Chalcodite'K(Fe3+,Mg,Fe2+)8(Si,Al)12(O,OH)27Tric. 1 : P1
9.EG.40Parsettensite(K,Na,Ca)7.5(Mn,Mg)49Si72O168(OH)50 · nH2OMon. 2/m : B2/m
9.EG.40LennilenapeiteK4Mn2+48[Si64Al8]O164(OH)52 · nH2OTric.
9.EG.40StilpnomelaneK4Fe2+48[Si64Al8]O164(OH)52 · nH2OTric. 1 : P1
9.EG.45Latiumite(Ca,K)4(Si,Al)5O11(SO4,CO3)Mon. 2 : P21
9.EG.45LevantiteKCa3Al2(SiO4)(Si2O7)(PO4)Mon. 2 : P21
9.EG.45TuscaniteKCa6(Si,Al)10O22(SO4,CO3)2(OH) · H2OMon. 2/m : P21/b
9.EG.50JagoitePb18Fe3+4[Si4(Si,Fe3+)6][Pb4Si16(Si,Fe)4]O82Cl6Hex. 6m2 : P6c2
9.EG.50FriisitePb8Al3Si8O27Cl3Hex. 6m2 : P62c
9.EG.55WickenburgiteCaPb3Al2Si10O24(OH)6Trig. 3m : P31c
9.EG.60HyttsjöitePb18Ba2Ca5Mn2+2Fe3+2Si30O90Cl · 6H2OTrig. 3 : R3
9.EG.65ArmbrusteriteK5Na7Mn15[(Si9O22)4](OH)10 · 4H2OMon. 2/m : B2/m
9.EG.70RoymilleritePb24Mg9(Si10O28)(CO3)10(BO3)(SiO4)(OH)13O5Tric. 1 : P1
9.EG.70Britvinite[Pb7(OH)3F(BO3)2(CO3)][Mg4.5(OH)3(Si5O14)]Tric. 1 : P1
9.EG.75KayupovaiteNa2Mn10[(Si14Al2)O38(OH)8] · 7H2OMon. 2/m : B2/b
9.EG.75'UM1989-30-SiO:AlBaCaFeHKMgMn'(Ba,Ca)(Mn,Fe,Mg)22(Si,Al)32O76(OH)16 · 12H2O
9.EG.75Bannisterite(Ca,K,Na)(Mn2+,Fe2+)10(Si,Al)16O38(OH)8 · nH2OMon. 2/m : B2/b

Fluorescence of TamaiteHide

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.

Internet Links for TamaiteHide

References for TamaiteHide

Localities for TamaiteHide

Showing 5 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.
Italy
 
  • Liguria
    • Genoa
      • Ne
Hughes et al. (2003)
  • Piedmont
    • Cuneo Province
      • Bellino
Piccoli et al. (2021)
Japan (TL)
 
  • Tokyo Metropolis
    • Nishitama district
      • Okutama-cho
[J.Mineral.Petrol.Sci. (2000) +4 other references
Switzerland
 
  • Valais
    • Entremont
      • Val de Bagnes
        • Charmotane
Ansermet S.; Meisser N. (2026)
USA
 
  • California
    • Trinity County
      • Mad River Rock
Richard Gunter Collection.
 
and/or  
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