Törnebohmite-(La)

Törnebohmite-(La), etc.

Mochalin Log, Kyshtym, Chelyabinsk Oblast, Russia

Törnebohmite-(La), etc.

Mochalin Log, Kyshtym, Chelyabinsk Oblast, Russia

Törnebohmite-(La), etc.

Mochalin Log, Kyshtym, Chelyabinsk Oblast, Russia

Törnebohmite-(La), etc.

Mochalin Log, Kyshtym, Chelyabinsk Oblast, Russia

Törnebohmite-(La), etc.

Mochalin Log, Kyshtym, Chelyabinsk Oblast, Russia

Törnebohmite-(La), etc.

Mochalin Log, Kyshtym, Chelyabinsk Oblast, Russia

Törnebohmite-(La), etc.

Mochalin Log, Kyshtym, Chelyabinsk Oblast, Russia

Törnebohmite-(La), etc.

Mochalin Log, Kyshtym, Chelyabinsk Oblast, Russia

About Törnebohmite-(La)Hide

Alfred E. Törnebohm

Formula:

La₂Al(SiO₄)₂(OH)

Colour:

Green, olive-green

Lustre:

Vitreous, Greasy

Hardness:

4½

Specific Gravity:

4.805

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.

Type Locality:

ⓘ Mochalin Log, Kyshtym, Chelyabinsk Oblast, Russia

The La analogue of törnebohmite-(Ce).

Unique IdentifiersHide

IMA Classification of Törnebohmite-(La)Hide

Classification of Törnebohmite-(La)Hide

Mineral SymbolsHide

Physical Properties of Törnebohmite-(La)Hide

Optical Data of Törnebohmite-(La)Hide

Type:

Biaxial (+)

RI values:

n_α = 1.808 n_β = 1.812 n_γ = 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

Pleochroism:

Strong

Comments:

X = strong bluish green; Y = yellow-green; Z = pinkish.

Chemistry of Törnebohmite-(La)Hide

X-Ray Powder DiffractionHide

Geological EnvironmentHide

Type Occurrence of Törnebohmite-(La)Hide

Synonyms of Törnebohmite-(La)Hide

Other Language Names for Törnebohmite-(La)Hide

Common AssociatesHide

Related Minerals - Strunz-mindat GroupingHide

Other InformationHide

Internet Links for Törnebohmite-(La)Hide

References for Törnebohmite-(La)Hide

Reference List:

Year ⬇Author Title Publisher

Geijer, P. (1920) The cerium minerals of Bastnäs at Riddarhyttan. Sveriges Geologiska Undersökning Arsbok: 14(304): 1-24.

Wherry, E.T. (1921) New minerals. American Mineralogist: 6: 118-119.

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, Ernest H., Mandarino, Joseph A. (1987) Procedures involving the IMA Commission on New Minerals and Mineral Names and guidelines on mineral nomenclature. American Mineralogist, 72 (9-10). 1031-1042

Nickel, E.H., Mandarino, J.A. (1987) Procedures involving the IMA commission on new minerals and mineral names, and guidelines on mineral nomenclature. The Canadian Mineralogist: 25: 353-377 (376).

Nickel, Ernest H., Mandarino, Joseph A. (1987) Procedures involving the IMA Commission on New Minerals and Mineral Names and guidelines on mineral nomenclature. American Mineralogist, 72 (9-10). 1031-1042

Holtstam, D., Andersson, U.B. (2007) The REE minerals of the Bastnäs-type deposits, south-central Sweden. The Canadian Mineralogist: 45: 1073-1114.

Localities for Törnebohmite-(La)Hide

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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

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- 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.

Australia
South Australia Flinders Ranges South Flinders Ranges Peterborough ⓘ Paratoo copper Mine	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)
Chelyabinsk Oblast Kyshtym ⓘ Mochalin Log (TL)	Sviajin, N.V. (1962) Tornebohmite from the alkaline province of Ural. Zapiski Vsesoyuznogo Mineralogicheskogo Obshchestva: 91: 97-99. Kasatkin, A.V., Zubkova, N.V., Pekov, I.V., Chukanov, N.V., Škoda, R., Polekhovsky, Y.S., Agakhanov, A.A., Belakovskiy, D.I., Kuznetsov, A.M., Britvin, S.N., Pushcharovsky, D.Yu. (2020) The mineralogy of the historical Mochalin Log REE deposit, South Urals, Russia. Part I. New gatelite-group minerals ferriperbøeite-(La), (CaLa3)(Fe3+Al2Fe2+)[Si2O7][SiO4]3O(OH)2 and perbøeite-(La), (CaLa3)(Al3Fe2+)[Si2O7][SiO4]3O(OH)2. Mineralogical Magazine: 84(4): 593–607.