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Tamaite

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Formula:
(Ca,K,Ba,Na)3-4Mn24(Si,Al)40(O,OH)112 · 21H2O
System:
Monoclinic
Colour:
Colourless to pale ...
Lustre:
Vitreous, Pearly
Hardness:
4
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.


Classification of Tamaite

Approved
9.EG.30

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

Physical Properties of Tamaite

Vitreous, Pearly
Diaphaneity (Transparency):
Transparent
Colour:
Colourless to pale yellowish brown
Streak:
White
Hardness (Mohs):
4

Optical Data of Tamaite

Type:
Biaxial (-)
Dispersion:
r < v slight

Chemical Properties of Tamaite

Formula:
(Ca,K,Ba,Na)3-4Mn24(Si,Al)40(O,OH)112 · 21H2O
IMA Formula:
(Ca,K,Ba,Na)xMn6(Si,Al)10O24(OH)4 · nH2O
Elements listed in formula:

Crystallography of Tamaite

Crystal System:
Monoclinic

Type Occurrence of Tamaite

Relationship of Tamaite to other Species

Other Members of Group:
Eggletonite(Na,K,Ca)2(Mn,Fe)8(Si,Al)12O29(OH)7 · 11H2O
Ganophyllite(K,Na,Ca)2Mn8(Si,Al)12(O,OH)32 · 8H2O
9.EG.05CymriteBaAl2Si2(O,OH)8 · H2O
9.EG.10Naujakasite(Na,K)6(Fe2+,Mn2+,Ca)(Al,Fe)4Si8O26
9.EG.10ManganonaujakasiteNa6(Mn2+,Fe2+)Al4Si8O26
9.EG.15DmisteinbergiteCa(Al2Si2O8)
9.EG.20KampfiteBa12(Si11Al5)O31(CO3)8Cl5
9.EG.25SträtlingiteCa2Al2SiO7 · 8H2O
9.EG.25VertumniteCa4Al4Si4O6(OH)24 · 3H2O
9.EG.30Eggletonite(Na,K,Ca)2(Mn,Fe)8(Si,Al)12O29(OH)7 · 11H2O
9.EG.30Ganophyllite(K,Na,Ca)2Mn8(Si,Al)12(O,OH)32 · 8H2O
9.EG.35CoombsiteK(Mn,Fe,Mg)13(Si,Al)18O42(OH)14
9.EG.35ZussmaniteK(Fe,Mg,Mn)13(Si,Al)18O42(OH)14
9.EG.40Franklinphilite(K,Na)4(Mn2+,Mg,Zn)48(Si,Al)72(O,OH)216 · 6H2O
9.EG.40LennilenapeiteK6-7(Mg,Mn,Fe,Zn)48(Si,Al)72(O,OH)216 · 16H2O
9.EG.40Parsettensite(K,Na,Ca)7.5(Mn,Mg)49Si72O168(OH)50 · nH2O
9.EG.40Stilpnomelane(K,Ca,Na)(Fe,Mg,Al)8(Si,Al)12(O,OH)36 · nH2O
9.EG.45Latiumite(Ca,K)4(Si,Al)5O11(SO4,CO3)
9.EG.45Tuscanite(K(Ca,Na)6(Si,Al)10O22[SO4,CO3,(OH)2] · H2O
9.EG.50JagoitePb18Fe43+[Si4(Si,Fe3+)6][Pb4Si16(Si,Fe)4]O82Cl6
9.EG.55WickenburgiteCaPb3Al2Si10O24(OH)6
9.EG.60HyttsjöitePb18Ba2Ca5Mn22+Fe23+Si30O90Cl · 6H2O
9.EG.65ArmbrusteriteK5Na7Mn15[(Si9O22)4](OH)10 · 4H2O
9.EG.70Britvinite[Pb7(OH)3F(BO3)2(CO3)][Mg4.5(OH)3(Si5O14)]
9.EG.75Bannisterite(Ca,K,Na)(Mn2+,Fe2+)10(Si,Al)16O38(OH)8 · nH2O

Other Names for Tamaite

Name in Other Languages:
German:Tamait
Russian:Тамаит
Simplified Chinese:塔玛水硅锰钙石
Spanish:Tamaita
Traditional Chinese:塔瑪水矽錳鈣石

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.

References for Tamaite

Reference List:
Matsubara, S., Miyawaki, R., Tiba, T. and Imai, H. (2000): Tamaite, the Ca-analogue of ganophyllite, from the Shiromaru mine, Okutama,Tokyo, Japan. Journal of Mineralogical and Petrological Sciences, 95, 79-83.

American Mineralogist (2001): 86: 769.

Internet Links for Tamaite

mindat.org URL:
https://www.mindat.org/min-7080.html
Please feel free to link to this page.

Localities for Tamaite

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.
(TL) indicates type locality for a valid mineral species. (FRL) indicates first recorded locality for everything else. ? indicates mineral may be doubtful at this locality. All other localities listed without reference should be considered as uncertain and unproven until references can be found.
Italy
 
  • Liguria
    • Genova Province
      • Ne
        • Graveglia Valley
Hughes, J.M., Rakovan, J., Bracco, R., Gunther, M.E. (2003): The atomic arrangement of the ganophyllite-group modulated layer silicates as determined from the orthorhombic dimorph of tamaite, with the elusive 16.8 Å ganophyllite-group superstructure revealed. American Mineralogist, 88, 1324-1330
Japan (TL)
 
  • Honshu Island
    • Kanto Region
      • Tokyo Metropolis
        • Nishi-Tama-gun
          • Okutama-cho
[J.Mineral.Petrol.Sci.(2000) 95, 79-83; MinRec 32:419]; Matsubara S, Miyawaki R, Yokoyama K, Shimizu M, Imai H (2004) Tokyoite, Ba2Mn3+(VO4)2(OH), a new mineral from the Shiromaru mine, Okutama, Tokyo, Japan. Journal of Mineralogical and Petrological Sciences 99, 363-367; photo in: Koubutsu Doshikai (2017) Kanto-to Shuhen-no Koubutsu (279pp).
Mineral and/or Locality  
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