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Törnebohmite-(La)

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About Törnebohmite-(La)Hide

Alfred E. Törnebohm
Formula:
(La,Ce)2Al(SiO4)2(OH)
Colour:
Green, olive-green
Lustre:
Waxy
Hardness:
Name:
Named törnebohmite after Alfred Elis Törnebohm (1838-1911), geologist, and a pioneer in the study of the Archean rocks of central Sweden. Later renamed with the suffix indicating the dominant rare earth element.
This page provides mineralogical data about Törnebohmite-(La).


Classification of Törnebohmite-(La)Hide

Approved
9.AG.45

9 : SILICATES (Germanates)
A : Nesosilicates
G : Nesosilicates with additional anions; cations in > [6] +- [6] coordination
52.4.5.2

52 : NESOSILICATES Insular SiO4 Groups and O,OH,F,H2O
4 : Insular SiO4 Groups and O, OH, F, and H2O with cations in [6] and/or >[6] coordination
16.13.3

16 : Silicates Containing Aluminum and other Metals
13 : Aluminosilicates of the rare earths

Physical Properties of Törnebohmite-(La)Hide

Transparency:
Translucent
Colour:
Green, olive-green
Hardness:
4½ on Mohs scale

Optical Data of Törnebohmite-(La)Hide

Type:
Biaxial (+)
RI values:
nα = 1.808 nβ = 1.812 nγ = 1.838
Max Birefringence:
δ = 0.030
Image shows birefringence interference colour range (at 30µm thickness)
and does not take into account mineral colouration.
Surface Relief:
Very High
Dispersion:
relatively strong

Chemical Properties of Törnebohmite-(La)Hide

Formula:
(La,Ce)2Al(SiO4)2(OH)
IMA Formula:
La2Al(SiO4)2(OH)

Type Occurrence of Törnebohmite-(La)Hide

Other Language Names for Törnebohmite-(La)Hide

Common AssociatesHide

Associated Minerals Based on Photo Data:
Bastnäsite-(La)2 photos of Törnebohmite-(La) associated with Bastnäsite-(La) on mindat.org.
Britholite-(Ce)2 photos of Törnebohmite-(La) associated with Britholite-(Ce) on mindat.org.
Allanite-(La)1 photo of Törnebohmite-(La) associated with Allanite-(La) on mindat.org.

Related Minerals - Nickel-Strunz GroupingHide

9.AG.EdgrewiteCa9(SiO4)4F2 Mon. 2/m : P21/b
9.AG.05AbswurmbachiteCuMn3+6(SiO4)O8Tet. 4/mmm (4/m 2/m 2/m) : I41/acd
9.AG.05BrauniteMn2+Mn3+6(SiO4)O8Tet. 4/mmm (4/m 2/m 2/m) : I41/acd
9.AG.05NeltneriteCaMn3+6(SiO4)O8Tet. 4/mmm (4/m 2/m 2/m) : I41/acd
9.AG.05Braunite-IICaMn3+14(SiO4)O20Tet. 4/mmm (4/m 2/m 2/m) : I41/acd
9.AG.10LångbaniteMn2+4Mn3+9Sb5+O16(SiO4)2Trig. 3m : P3m1
9.AG.15MalayaiteCaSn(SiO4)OMon.
9.AG.15TitaniteCaTi(SiO4)OMon. 2/m : P21/b
9.AG.15VanadomalayaiteCaV4+(SiO4)OMon.
9.AG.15Natrotitanite(Na0.5Y0.5)Ti(SiO4)OMon. 2/m : B2/b
9.AG.15ŻabińskiiteCa[Al0.5(Ta,Nb)0.5)](SiO4)OTric. 1
9.AG.20Cerite-(Ce)(Ce,Ca)9(Mg,Fe)(SiO4)3(HSiO4)4(OH)3Trig. 3m : R3c
9.AG.20Cerite-(La)(La,Ce,Ca)9(Fe,Ca,Mg)(SiO4)3(HSiO4)4(OH)3Trig. 3m : R3c
9.AG.20Aluminocerite-(Ce)(Ce,La,Ca)9(Al,Fe3+)(SiO4)3(HSiO4)4(OH)3Trig. 3m : R3c
9.AG.25Trimounsite-(Y)Y2Ti2(SiO4)O5Mon.
9.AG.25Yftisite-(Y)(Y,Dy,Er)4(Ti,Sn)(SiO4)2O(F,OH)6
9.AG.25Mieite-(Y)Y4Ti(SiO4)2O[F,(OH)]6Orth. mmm (2/m 2/m 2/m) : Cmcm
9.AG.30SitinakiteKNa2Ti4(SiO4)2O5(OH) · 4H2OTet.
9.AG.35KittatinnyiteCa2Mn2Mn(SiO4)2(OH)4 · 9H2OHex.
9.AG.40aNatisiteNa2Ti(SiO4)OTet.
9.AG.40bParanatisiteNa2Ti(SiO4)OOrth.
9.AG.45Törnebohmite-(Ce)(Ce,La)2Al(SiO4)2(OH)
9.AG.50Kuliokite-(Y)Y4Al(SiO4)2(OH)2F5
9.AG.55ChantaliteCaAl2(SiO4)(OH)4Tet. 4/m : I41/a
9.AG.60MozartiteCaMn3+(SiO4)(OH)Orth. 2 2 2 : P21 21 21
9.AG.60VuagnatiteCaAl(SiO4)(OH)Orth.
9.AG.65HatruriteCa3(SiO4)OTrig.
9.AG.70JasmunditeCa11(SiO4)4O2STet. 4 2m : I4m2
9.AG.75AfwilliteCa3(HSiO4)2 · 2H2OMon. m : Bb
9.AG.80BultfonteiniteCa2(HSiO4)F · H2OTric.
9.AG.85ZoltaiiteBaV4+2V3+12(SiO4)2O19Trig. 3 : P3
9.AG.90Tranquillityite(Fe2+,Ca)8(Zr,Y)2Ti3(SiO4)3O12Hex.

Related Minerals - Dana Grouping (8th Ed.)Hide

52.4.5.1Törnebohmite-(Ce)(Ce,La)2Al(SiO4)2(OH)

Related Minerals - Hey's Chemical Index of Minerals GroupingHide

16.13.1Vyuntspakhkite-(Y)(Y,Yb)4Al2.5-1.5(Si,Al)1.5-2.5(SiO4)4O(OH)7
16.13.2Törnebohmite-(Ce)(Ce,La)2Al(SiO4)2(OH)
16.13.4Allanite-(Y){CaY}{Al2Fe2+}(Si2O7)(SiO4)O(OH)Mon.
16.13.5Allanite-(Ce){CaCe}{Al2Fe2+}(Si2O7)(SiO4)O(OH)Mon. 2/m : P21/m
16.13.6Dollaseite-(Ce){CaCe}{MgAlMg}(Si2O7)(SiO4)(OH)FMon. 2/m : P21/m
16.13.8Dissakisite-(Ce){CaCe}{Al2Mg}(Si2O7)(SiO4)O(OH)Mon. 2/m : P21/m

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.

References for Törnebohmite-(La)Hide

Reference List:
Sort by Year (asc) | by Year (desc) | by Author (A-Z) | by Author (Z-A)
Mineralogical Magazine (1921): 19: 351.
Sviajin, N.V. (1962) Tornebohmite from the alkaline province of Ural. Zapiski Vsesoyuznogo Mineralogicheskogo Obshchestva: 91: 97-99.
Levinson, A.A. (1966) A system of nomenclature for rare-earth minerals. American Mineralogist: 51: 152-158.
Shen, J., Moore, P.B. (1982) Törnebohmite, RE2Al(OH)[SiO4]2: crystal structure and genealogy of RE(III)Si(IV)‹—›Ca(II)P(V) isomorphisms. American Mineralogist: 67: 1021-1028.
Nickel, E.H., Mandarino, J.A. (1987) Procedures involving the IMA Commission on New Minerals and Mineral Names and guidelines on mineral nomenclature. American Mineralogist: 72: 1031-1042.
Canadian Mineralogist (1988): 25: 376.

Internet Links for Törnebohmite-(La)Hide

Localities for Törnebohmite-(La)Hide

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.

Locality ListHide

- This locality has map coordinates listed. - This locality has estimated coordinates. ⓘ - Click for 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 (eg from pseudomorphs.)

All localities listed without proper references should be considered as questionable.
Australia
 
  • South Australia
    • Olary Province
      • Yunta
The Paratoo, iron oxide, copper and REE deposit near Yunta, South Australia. Joel Brugger, Allan Pring and Jason Tilley, South Australian Museum. (Talk prepared and given to the 26th annual conference of the State’s Mineralogical Societies, Australia. June 2003
Russia (TL)
 
  • Urals Region
    • Southern Urals
      • Chelyabinsk Oblast'
        • Kyshtym (Kychtym; Kishtim)
N.V. Svyazhin Tornebohmite from alkaline province of Ural, - Zapiski VMO,1962,91,N1, 97-99.
Mineral and/or Locality  
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