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Taramellite

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Formula:
Ba4(Fe3+,Ti)4O2[B2Si8O27]Clx; x = 0 to 1
System:
Orthorhombic
Colour:
Red-brown
Lustre:
Vitreous, Silky
Hardness:
Name:
Named after Torquato Taramelli (Bergamo, October 15, 1845 – Pavia, March 31, 1922), professor of geology, University of Pavia (Italia).

Classification of Taramellite

Approved, 'Grandfathered' (first described prior to 1959)
9.CE.20

9 : SILICATES (Germanates)
C : Cyclosilicates
E : [Si4O12]8- 4-membered single rings (vierer-Einfachringe), without insular complex anions
64.3.1.1

64 : CYCLOSILICATES Rings with Other Anions and Insular Silicate Groups
3 : Rings with Other Anions and Insular Silicate Groups: 4-membered rings with [Si2O7] dimers
17.5.34

17 : Silicates Containing other Anions
5 : Borosilicates

Physical Properties of Taramellite

Vitreous, Silky
Diaphaneity (Transparency):
Transparent
Colour:
Red-brown
Hardness (Mohs):
Cleavage:
Perfect
Perfect on {100}
Parting:
Perpendicular to {100}
Density:
3.92 g/cm3 (Measured)    

Optical Data of Taramellite

Type:
Biaxial (+)
RI values:
nα = 1.770(3) nβ = 1.774(3) nγ = 1.830(2)
2V:
Measured: 40° (3), Calculated: 32°
Max Birefringence:
δ = 0.060
Image shows birefringence interference colour range (at 30µm thickness) and does not take into account mineral colouration.
Surface Relief:
Very High
Dispersion:
r > v distinct
Pleochroism:
Strong
Comments:
X = Y = pale pinkish to flesh-red; Z = dark brown to nearly black.

Chemical Properties of Taramellite

IMA Formula:
Ba4(Fe3+,Ti)4O2[B2Si8O27]Clx; x = 0 to 1
Elements listed in formula:
Common Impurities:
Mn,Pb,Ca,Na,K,H2O

Crystallography of Taramellite

Crystal System:
Orthorhombic
Class (H-M):
mmm (2/m 2/m 2/m) - Dipyramidal
Space Group:
Pmmn
Space Group Setting:
Pmmn
Cell Parameters:
a = 12.05 Å, b = 13.9 Å, c = 7.12 Å
Ratio:
a:b:c = 0.867 : 1 : 0.512
Unit Cell Volume:
V 1,192.56 ų (Calculated from Unit Cell)
Z:
2
Morphology:
Tabular to equidimensional crystals; as fibrous aggregates and massive.
X-Ray Powder Diffraction Data:
d-spacingIntensity
3.01 (100)
2.584 (55)
3.83 (50)
2.480 (45)
3.30 (40)
3.16 (40)
2.783 (30)

Type Occurrence of Taramellite

Place of Conservation of Type Material:
Natural History Museum, Paris, France, 109.1005.
Geological Setting of Type Material:
metamorphic rocks rich in barium silicates, in contact with granitic rocks

Relationship of Taramellite to other Species

Series:
Forms a series with Titantaramellite (see here)
9.CE.05PapagoiteCaCuAlSi2O6(OH)3
9.CE.10VerplanckiteBa4Mn22+Si4O12(OH,H2O)3Cl3
9.CE.15BaotiteBa4(Ti,Nb,W)8O16(SiO3)4Cl
9.CE.20NagashimaliteBa4(V3+,Ti)4(O,OH)2[B2Si8O27]Cl
9.CE.20TitantaramelliteBa4(Ti,Fe3+,Mg)4(O,OH)2[B2Si8O27]Clx
9.CE.25Bario-orthojoaquiniteBa4Fe22+Ti2O2(SiO3)8 · H2O
9.CE.25Byelorussite-(Ce)NaBa2Ce2Mn2+Ti2Si8O26(F,OH) · H2O
9.CE.25Joaquinite-(Ce)NaBa2Fe2+Ti2Ce2(SiO3)8O2(OH) · H2O
9.CE.25Orthojoaquinite-(Ce)NaBa2Fe2+Ce2Ti2(SiO3)8O2(O,OH) · H2O
9.CE.25Strontiojoaquinite(Na,Fe)2Ba2Sr2Ti2(SiO3)8(O,OH)2 · H2O
9.CE.25Strontio-orthojoaquiniteNaSr4Fe3+Ti2Si8O24(OH)4
9.CE.25Orthojoaquinite-(La)NaBa2La2Fe2+Ti2Si8O26(OH,O,F) · H2O
9.CE.30eLabuntsovite-MnNa4K4Mn22+Ti8O4(Si4O12)4(OH)4 · 10-12H2O
9.CE.30aNenadkevichite(Na,◻)8Nb4(Si4O12)2(O,OH)4 · 8H2O
9.CE.30dLemmleinite-KNa4K8Ti8(Si4O12)4(O,OH)8 · 8H2O
9.CE.30aKorobitsynite(Na,◻)8Ti4(Si4O12)2(O,OH)4 · 8H2O
9.CE.30cKuzmenkoite-MnK4Mn2Ti8(Si4O12)4(OH,O)8 · 10-12H2O
9.CE.30bVuoriyarvite-K(K,Na,◻)12Nb8(Si4O12)4O8 · 12-16H2O
9.CE.30bTsepinite-Na(Na,H3O,K,Sr,Ba,◻)12Ti8(Si4O12)4(OH,O)8 · 12-16H2O
9.CE.30cKarupmøllerite-Ca(Na,Ca,K)2Ca(Nb,Ti)4(Si4O12)2(O,OH)4 · 7H2O
9.CE.30eLabuntsovite-MgNa4K4Mg2Ti8O4(Si4O12)4(OH)4 · 10-12H2O
9.CE.30eLabuntsovite-FeNa4K4Fe22+Ti8(Si4O12)4(O,OH)8 · 10-12H2O
9.CE.30dLemmleinite-BaNa4K4Ba2+xTi8(Si4O12)4(O,OH)8 · 8H2O
9.CE.30cGjerdingenite-FeK2Fe(Nb,Ti)4(Si4O12)2(O,OH)4 · 6H2O
9.CE.30hNeskevaaraite-FeNaK3Fe(Ti,Nb)4(Si4O12)2(O,OH)4 · 6H2O
9.CE.30bTsepinite-K(K,Ba,Na)2(Ti,Nb)2Si4O12(OH,O)2 · 3H2O
9.CE.30bParatsepinite-Ba(Ba,Na,K)2-x(Ti,Nb)2Si4O12(OH,O)2 · 4H2O
9.CE.30bTsepinite-Ca(Ca,K,Na)2-x(Ti,Nb)2Si4O12(OH,O)2 · 4H2O
9.CE.30hAlsakharovite-ZnNaSrKZn(Ti,Nb)4(Si4O12)2(O,OH)4 · 7H2O
9.CE.30cGjerdingenite-MnK2Mn(Nb,Ti)4(Si4O12)2(O,OH)4 · 6H2O
9.CE.30cLepkhenelmite-ZnBa2Zn(Ti,Nb)4(Si4O12)2(O,OH)4 · 7H2O
9.CE.30bTsepinite-Sr(Sr,Ba,K)(Ti,Nb)2Si4O12(OH,O)2 · 3H2O
9.CE.30bParatsepinite-Na(Na,Sr,K,Ca)2(Ti,Nb)2(Si4O12)(O,OH)2 · 4H2O
9.CE.30fParalabuntsovite-MgNa8K8Mg4Ti16(Si4O12)8(O,OH)16 · 20-24H2O
9.CE.30cGjerdingenite-CaK2Ca(Nb,Ti)4(Si4O12)2(O,OH)4 · 6H2O
9.CE.30cGjerdingenite-Na(K,Na)2Na(Nb,Ti)4(Si4O12)2(OH,O)4 · 5H2O
9.CE.30hGutkovaite-MnCaK2Mn(Ti,Nb)4(Si4O12)2(O,OH)4 · 5H2O
9.CE.30cKuzmenkoite-ZnK2ZnTi4(Si4O12)2(OH)4 · 6-8H2O
9.CE.30gOrganovaite-MnK2MnNb4(Si4O12)2O4 · 5-7H2O
9.CE.30gOrganovaite-ZnK2Zn(Nb,Ti)4(Si4O12)2(O,OH)4 · 6H2O
9.CE.30gParakuzmenkoite-Fe(K,Ba)8Fe4Ti16(Si4O12)8(OH,O)16 · 20-28H2O
9.CE.30cBurovaite-Ca(Na,K)4Ca2(Ti,Nb)8[Si4O12]4(OH,O)8 · 12H2O
9.CE.45Komarovite(Ca,Sr,Na)6-x(Nb,Ti)6(Si4O12)(O,OH,F)16 · nH2O
9.CE.45Natrokomarovite(Na,Ca,H)2Nb2Si2O10(OH,F)2 · H2O
17.5.1ManandoniteLi2Al4(Si2AlB)O10(OH)8
17.5.2ReedmergneriteNaBSi3O8
17.5.3SearlesiteNaBSi2O5(OH)2
17.5.4OleniteNaAl3Al6(Si6O18)(BO3)3(O3)OH
17.5.5ElbaiteNa(Al1.5Li1.5)Al6(Si6O18)(BO3)3(OH)3OH
17.5.6KalborsiteK6Al4BSi6O20(OH)4Cl
17.5.7BoromuscoviteKAl2(Si3B)O10(OH)2
17.5.8PoudretteiteKNa2(B3Si12)O30
17.5.9LiddicoatiteCa(Li2Al)Al6(Si6O18)(BO3)3(OH)3(OH)
17.5.10DatoliteCaB(SiO4)(OH)
17.5.11DanburiteCaB2Si2O8
17.5.12HowliteCa2B5SiO9(OH)5
17.5.13BakeriteCa4(H5B5Si3O20)
17.5.14OyeliteCa10B2Si8O29 · 12H2O
17.5.15Kornerupine(Mg,Fe2+,Al,◻)10(Si,Al,B)5O21(OH,F)
17.5.16HarkeriteCa12Mg4Al(SiO4)4(BO3)3(CO3)5 · H2O
17.5.17SerendibiteCa4(Mg6Al6)O4[Si6B3Al3O36]
17.5.18Stillwellite-(Ce)CeBSiO5
17.5.19Tadzhikite-(Ce)
17.5.20Melanocerite-(Ce)Ce5(SiO4,BO4)3(OH,O)
17.5.21Okanoganite-(Y)(Y,REE,Ca,Na,Th)16(Fe3+,Ti)(Si,B,P)10(O,OH)38F10
17.5.22Tritomite-(Ce)Ce5(SiO4,BO4)3(OH,O)
17.5.23Tritomite-(Y)Y5(SiO4,BO4)3(O,OH,F)
17.5.24Cappelenite-(Y)BaY6B6Si3O24F2
17.5.25DumortieriteAlAl6BSi3O18
17.5.26Holtite(Ta0.60.4)Al6BSi3O18
17.5.27DraviteNaMg3Al6(Si6O18)(BO3)3(OH)3OH
17.5.28 FerridraviteNaFe33+(Mg2Fe43+)(Si6O18)(BO3)3(OH)3O
17.5.29Axinite-(Mg)Ca4Mg2Al4[B2Si8O30](OH)2
17.5.30UviteCa(Mg3)MgAl5(Si6O18)(BO3)3(OH)3(F/OH)
17.5.31GarrelsiteNaBa3B7Si2O16(OH)4
17.5.32TienshaniteK(Na,K,◻)9Ca2Ba6Mn62+Ti6B12Si36O114(O,OH,F)11
17.5.33LeucospheniteNa4BaTi2B2Si10O30
17.5.35TitantaramelliteBa4(Ti,Fe3+,Mg)4(O,OH)2[B2Si8O27]Clx
17.5.36NagashimaliteBa4(V3+,Ti)4(O,OH)2[B2Si8O27]Cl
17.5.37Chromium-draviteNa(Mg3)Cr63+(Si6O18)(BO3)3(OH)3(OH)
17.5.38WawayandaiteCa6Be9Mn22+BSi6O23(OH,Cl)15
17.5.39WerdingiteMg2Al14Si4B4O37
17.5.40Axinite-(Mn)Ca4Mn22+Al4[B2Si8O30](OH)2
17.5.41Axinite
17.5.42TinzeniteCa2Mn42+Al4[B2Si8O30](OH)2
17.5.44SchorlNaFe32+Al6(Si6O18)(BO3)3(OH)3OH
17.5.45Fluor-buergeriteNaFe33+Al6(Si6O18)(BO3)3O3F
17.5.46FeruviteCaFe32+(Al5Mg)(Si6O18)(BO3)3(OH)3OH
17.5.47Axinite-(Fe)Ca4Fe22+Al4[B2Si8O30](OH)2
17.5.48HomiliteCa2Fe2+B2(SiO4)2O2
17.5.49GrandidieriteMgAl3O2(BO3)SiO4
17.5.50Hyalotekite(Ba,Pb,K)4(Ca,Y)2(B,Be)2(Si,B)2Si8O28F
17.5.51Hellandite-(Y)(Ca,REE)4Y2Al(Be,Li)2-xB4Si4O22(OH)2

Other Names for Taramellite

Name in Other Languages:

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 Taramellite

Reference List:
Tacconi E (1908) Ueber Taramellit, ein neues Mineral. Centralblatt für Mineralogie, Geologie und Paläontologie 1908, 506-508

Atti R. Accad. Lincei. Rend. Cl. Sci. fis. mat. nat., Roma (1908), ser.5, 17, 810.

American Mineralogist (1959): 44: 469.

Pabst, Adolf (1978) Zur morphologie des taramellits. Tschermaks Mineralogische und Petrographische Mitteilungen: 25: 245-256.

Mazzi, F. & G. Rossi (1980), The crystal structure of taramellite: American Mineralogist: 65: 123-128.

American Mineralogist (1984): 69: 358-373.

Grew, E.S., and Anovitz, L.M. (1996) BORON: Mineralogy, Petrology and Geochemistry, second edition, as revised (2002).

Internet Links for Taramellite

mindat.org URL:
https://www.mindat.org/min-3888.html
Please feel free to link to this page.

Localities for Taramellite

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.
Canada
 
  • Yukon
    • Watson Lake Mining District
      • Itsi Mt.
        • Wilson Lake
Canadian Mineralogist:11:444; American Mineralogist, Volume 69, pages 358-373, 1984; Canadian Mineralogist22:653-658
Finland
 
  • Western and Inner Finland Region
Heikkilä, Pasi 2003. Vittinki-ryhmän metaserttien geologia ja mineralogia Etelä-Pohjanmaalla. Pro gradu, matemaattis-luonnontieteellinen tiedekunta, Geologian laitos. Helsingin Yliopisto.
Italy (TL)
 
  • Piedmont
    • Verbano-Cusio-Ossola Province
      • Ossola Valley
        • Mergozzo
          • Candoglia
Tacconi, E. (1908): Taramellite, nuovo silicato di ferro e bario. Rendiconti della Reale Accademia dei Lincei, Serie V, 18, 810-814; Tacconi, E. (1908): Ueber Taramellit, ein neues Mineral. Centralblatt für Mineralogie, Geologie und Paläontologie, 1908, 506-508; Gramaccioli, C.M. (1975): Minerali alpini e prealpini. Edizioni Atlas Bergamo.
Mexico
 
  • Baja California (Baja California Norte; BC Norte)
    • Tres Pozos
American Mineralogist, Volume 69, pages 358-373, 1984
Sweden
 
  • Värmland
    • Filipstad
Nysten, P., Holtstam, D. and Jonsson, E. (1999) The Långban minerals. In Långban - The mines,their minerals, geology and explorers (D. Holtstam and J. Langhof, eds.), Swedish Museum of Natural History and Raster Förlag, Stockholm & Chr. Weise Verlag, Munich, pp. 89-183.
USA
 
  • California
    • Fresno Co.
      • Big Creek-Rush Creek District
        • Rush Creek deposit
Anonymous (1963), Core drilling at Rush Creek completed: California Division Mines, Mineral Information Service: 16(1): 11; Stinson, Melvin Clarence & J.T. Alfors (1964), New minerals from Fresno County – I: California Division Mines & Geology Mineral Information Service.: 17: 235-238; Murdoch, Joseph & Robert W. Webb (1966), Minerals of California, Centennial Volume (1866-1966): California Division Mines & Geology Bulletin 189: 359, 381.
    • San Benito Co.
      • Diablo Range
        • New Idria District
          • Picacho Peak
            • Clear Creek area
American Mineralogist, Volume 69, pages 358-373, 1984
    • Santa Cruz Co.
      • Santa Cruz
Gross, E.B., Wainwright, J.E.N., and Evans, B.W. (1965) Pabstite, the tin analogue of benitoite. American Mineralogist: 50: 1164-1169; Gross, E.B., Chesterman, C.W., Dunning, G.E., and Cooper, J.F. (1967) Mineralogy of the Kalkar quarry, Santa Cruz, California. California Division Mines and Geol. Special Report 92: 3-10; Pabst, Adolf (1978) Zur morphologie des taramellits. Tschermaks Mineralogische und Petrographische Mitteilungen: 25: 245-256; Pemberton, H. Earl (1983), Minerals of California; Van Nostrand Reinholt Press: 138, 466.
Mineral and/or Locality  
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