Thoreaulite

Thoreaulite, etc.

Ognevka Ta deposit, Ulan, East Kazakhstan, Kazakhstan

Thoreaulite, etc.

Ognevka Ta deposit, Ulan, East Kazakhstan, Kazakhstan

Thoreaulite

Manono-Kitotolo mine, Tanganyika, DR Congo

Thoreaulite, etc.

Ognevka Ta deposit, Ulan, East Kazakhstan, Kazakhstan

Thoreaulite, etc.

Ognevka Ta deposit, Ulan, East Kazakhstan, Kazakhstan

Thoreaulite

Manono-Kitotolo mine, Tanganyika, DR Congo

Thoreaulite, etc.

Ognevka Ta deposit, Ulan, East Kazakhstan, Kazakhstan

Thoreaulite, etc.

Ognevka Ta deposit, Ulan, East Kazakhstan, Kazakhstan

About ThoreauliteHide

Jacques Thoreau (1885-1973)

Formula:

(Sn²⁺,Pb)(Ta,Nb)₂O₆

Colour:

Brown to yellow

Lustre:

Adamantine, Resinous

Hardness:

5½ - 6

Specific Gravity:

7.6 - 7.9

Crystal System:

Monoclinic

Member of:

Foordite Group

Name:

Named in 1933 by Henri Buttgenbach in honor of Jacques Thoreau [September 27, 1886 Brussels, Belgium - January 11, 1973 Kessel-Lo, Belgium], Professor of Mineralogy, Université Catholique de Leuvain-UCL, Belgium.

Type Locality:

ⓘ Manono-Kitotolo mine, Tanganyika, DR Congo

Isostructural with:

Foordite

Foordite-Thoreaulite Series.
Thoreaulite was first described by Buttgenbach (1933) from a pegmatite at the Manono Mine, Tanganyika, DR Congo.

Classification of ThoreauliteHide

Physical Properties of ThoreauliteHide

Optical Data of ThoreauliteHide

Type:

Biaxial (+)

RI values:

n_α = 2.390 n_β = 2.420 n_γ = 2.520

2V:

Measured: 25° to 35°, Calculated: 60°

Birefringence:

On {100} cleavages = 0.039.

Max Birefringence:

δ = 0.130

Image shows birefringence interference colour range (at 30µm thickness)
and does not take into account mineral colouration.

Surface Relief:

Very High

Dispersion:

r < v

Chemical Properties of ThoreauliteHide

Crystallography of ThoreauliteHide

Crystal StructureHide

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Data courtesy of the American Mineralogist Crystal Structure Database. Click on an AMCSD ID to view structure

ID	Species	Reference	Link	Year	Locality	Pressure (GPa)	Temp (K)
0000199	Thoreaulite	Mumme W G (1970) The crystal structure of SnTa2O7, thoreaulite, an example of tin in five-fold coordination American Mineralogist 55 367-377		1970		0	293
0015601	Thoreaulite	Maksimova N V, Ilyukhin V V, Belov N V (1975) Crystal structure of thoreaulite, SaTa2O6 Soviet Physics Doklady 20 528-529		1975	Manono, Katanga, Democratic Republic of the Congo	0	293

CIF Raw Data - click here to closedata_global _chemical_name_mineral 'Thoreaulite' loop_ _publ_author_name 'Mumme W G' _journal_name_full 'American Mineralogist' _journal_volume 55 _journal_year 1970 _journal_page_first 367 _journal_page_last 377 _publ_section_title ; The crystal structure of SnTa2O7, thoreaulite, an example of tin in five-fold coordination ; _database_code_amcsd 0000199 _chemical_formula_sum 'Sn Ta2 O7' _cell_length_a 17.140 _cell_length_b 4.865 _cell_length_c 5.548 _cell_angle_alpha 90 _cell_angle_beta 91.0 _cell_angle_gamma 90 _cell_volume 462.556 _exptl_crystal_density_diffrn 8.510 _symmetry_space_group_name_H-M 'C 1 2/c 1' loop_ _space_group_symop_operation_xyz 'x,y,z' '1/2+x,1/2+y,z' 'x,-y,1/2+z' '1/2+x,1/2-y,1/2+z' '-x,y,1/2-z' '1/2-x,1/2+y,1/2-z' '-x,-y,-z' '1/2-x,1/2-y,-z' loop_ _atom_site_label _atom_site_fract_x _atom_site_fract_y _atom_site_fract_z _atom_site_U_iso_or_equiv Sn 0.00000 0.23000 0.25000 0.01520 Ta 0.16980 0.24030 0.66750 0.01140 O1 0.00000 0.39200 0.75000 0.04559 O2 0.07500 0.09700 0.59900 0.03293 O3 0.12400 0.56700 0.42700 0.04559 O4 0.21700 0.07700 0.34200 0.04433

Type Occurrence of ThoreauliteHide

Synonyms of ThoreauliteHide

Other Language Names for ThoreauliteHide

Relationship of Thoreaulite to other SpeciesHide

Common AssociatesHide

Related Minerals - Nickel-Strunz GroupingHide

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

Related Minerals - Hey's Chemical Index of Minerals GroupingHide

Other InformationHide

References for ThoreauliteHide

Internet Links for ThoreauliteHide

Localities for ThoreauliteHide

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.

Brazil
Minas Gerais Itinga Monte Belo ⓘ Urubu mine	[MinRec 12:74]; Daniel Atencio, Reynaldo R. Contreira Fo., Stuart J. Mills, Jose M.V. Coutinho, Sara B. Honorato, Alejandro P. Ayala, Javier Ellena, and Marcelo B. de Andrade (2011) Rankamaite from the Urubu pegmatite, Itinga, Minas Gerais, Brazil: crystal chemistry and Rietveld refinement. Am. Mineral. 96, 1455–1460.
China
Heilongjiang Hegang Luobei County ⓘ Luobei pegmatite field	Deshi Lu (1993): Geology and Prospecting 29(6), 8-12
DR Congo
Maniema ⓘ Kalima	Henri Buttgenbach (1947) Les minéraux de Belgique et du Congo belge
ⓘ Maniema pegmatite	Uher, P., Cerny, P., & Chapman, R. (2008). Foordite-thoreaulite, Sn2+ Nb2O6Sn2+ Ta2O6: compositional variations and alteration products. European Journal of Mineralogy, 20(4), 501-516.
South Kivu Walungu Territory ⓘ Kahungwe	Vik Vanrusselt photo & specimen (Ex Rik Dillen specimen)
Tanganyika ⓘ Manono-Kitotolo mine (TL)	Buttgenbach, H.(1933): La thoreaulite, nouvelle espéce minérale. Annales de la Société géologique de Belgique. 56: 327-328; Dewaele, S., Hulsbosch, N., Cryns, Y., Boyce, A., Burgess, R., & Muchez, P. (2016). Geological setting and timing of the world-class Sn, Nb–Ta and Li mineralization of Manono-Kitotolo (Katanga, Democratic Republic of Congo). Ore Geology Reviews, 72, 373-390.
Kazakhstan
East Kazakhstan Kalba Range Irtysh River ⓘ Ungursai Ta Deposit	Pekov, I. (1998) Minerals First discovered on the territory of the former Soviet Union 369p. Ocean Pictures, Moscow
Ulan ⓘ Ognevka Ta deposit	Voloshin, A.V., Pakomovskii, Ya.A., Stepanov, V.I., Tyusheva, F.N. (1983): Lithiotantite, Li,(Ta,Nb)3O8, a new mineral from granite pegmatites of Eastern Kazakhstan. Mineralogiceskij Zhurnal, 5(1), 91-95. Pekov, I. (1998) Minerals First discovered on the territory of the former Soviet Union 369p. Ocean Pictures, Moscow
Rwanda
Western Province Ngororero Gatumba ⓘ Buranga pegmatite	Bertossa, A. (1968) Inventaire des minéraux du Rwanda. Bulletin du Service Géologique de Rwanda: 4: 25-45.; Daltry, V.D.C. and von Knorring, O. (1998) Type-mineralogy of Rwanda with particular reference to the Buranga pegmatite. Geologica Belgica: 1: 9-15.
Kabaya ⓘ Sebeya river ?	Ann. Soc. Geol. Belgique, Vol. 73, No. 8, p. 213-218, 1950.