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Thorianite

A valid IMA mineral species - grandfathered
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About ThorianiteHide

Formula:
ThO2
Colour:
Black, brownish black, dark gray, dark reddish brown
Lustre:
Resinous, Sub-Metallic
Hardness:
6½ - 7
Specific Gravity:
9.7 - 9.8
Crystal System:
Isometric
Member of:
Name:
The name reflects its thorium content.

Unique IdentifiersHide

Mindat ID:
3944
Long-form identifier:
mindat:1:1:3944:0
GUID
(UUID V4):
b26e758a-a55e-44ab-ae6f-2116c06d7bf9

Classification of ThorianiteHide

Approved, 'Grandfathered' (first described prior to 1959)
4.DL.05

4 : OXIDES (Hydroxides, V[5,6] vanadates, arsenites, antimonites, bismuthites, sulfites, selenites, tellurites, iodates)
D : Metal: Oxygen = 1:2 and similar
L : With large (+- medium-sized) cations; fluorite-type structures
5.1.1.2

5 : OXIDES CONTAINING URANIUM OR THORIUM
1 : AXO2·xH2O
7.10.10

7 : Oxides and Hydroxides
10 : Oxides of Zr and Th

Mineral SymbolsHide

As of 2021 there are now IMA–CNMNC approved mineral symbols (abbreviations) for each mineral species, useful for tables and diagrams.

Please only use the official IMA–CNMNC symbol. Older variants are listed for historical use only.

SymbolSourceReference
ThoIMA–CNMNCWarr, L.N. (2021). IMA–CNMNC approved mineral symbols. Mineralogical Magazine, 85(3), 291-320. doi:10.1180/mgm.2021.43
ThoThe Canadian Mineralogist (2019)The Canadian Mineralogist (2019) The Canadian Mineralogist list of symbols for rock- and ore-forming minerals (December 30, 2019). download

Physical Properties of ThorianiteHide

Resinous, Sub-Metallic
Transparency:
Opaque
Colour:
Black, brownish black, dark gray, dark reddish brown
Comment:
may have a bronzy tarnish
Streak:
Grey, grey-green to black
Hardness:
6½ - 7 on Mohs scale
Hardness:
VHN100=1132 - 1278 kg/mm2 - Vickers
Tenacity:
Brittle
Cleavage:
Poor/Indistinct
{001} poor.
Fracture:
Irregular/Uneven, Sub-Conchoidal
Density:
9.7 - 9.8 g/cm3 (Measured)    9.991 g/cm3 (Calculated)

Optical Data of ThorianiteHide

Anisotropism:
may show weak anomalous anisotropism
Colour in reflected light:
gray
Internal Reflections:
red-brown

Chemical Properties of ThorianiteHide

Formula:
ThO2
CAS Registry number:
1314-20-1

CAS Registry numbers are published by the American Chemical Society
Common Impurities:
U,Ce,La,Pb,TR

Crystallography of ThorianiteHide

Crystal System:
Isometric
Class (H-M):
m3m (4/m 3 2/m) - Hexoctahedral
Space Group:
Fm3m
Setting:
Fm3m
Cell Parameters:
a = 5.595 Å
Unit Cell V:
175.15 ų (Calculated from Unit Cell)
Z:
4
Morphology:
Cubic crystals, usually rounded to some degree (water worn).
Twinning:
Penetration twins on {111} very common.

Crystal StructureHide

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IDSpeciesReferenceLinkYearLocalityPressure (GPa)Temp (K)
0011725ThorianiteWyckoff R W G (1963) Second edition. Interscience Publishers, New York, New York Fluorite structure Crystal Structures 1 239-44419630293
CIF Raw Data - click here to close

X-Ray Powder DiffractionHide

Powder Diffraction Data:
d-spacingIntensity
3.234 Å(100)
1.689 Å(64)
1.980 Å(58)
2.800 Å(35)
1.284 Å(26)
1.1432 Å(20)
1.0779 Å(19)

Geological EnvironmentHide

Paragenetic Mode(s):
Paragenetic ModeEarliest Age (Ga)
Near-surface Processes
26 : Hadean detrital minerals
Stage 4b: Highly evolved igneous rocks>3.0
34 : Complex granite pegmatites
36 : Carbonatites, kimberlites, and related igneous rocks

Type Occurrence of ThorianiteHide

Geological Setting of Type Material:
accessory mineral in granite pegmatites
Reference:
Dunstan W (1904) The occurrence of thorium in Ceylon. Nature 69, 510-511

Synonyms of ThorianiteHide

Other Language Names for ThorianiteHide

German:Thorianit
Simplified Chinese:方钍石
Spanish:Torianita

Varieties of ThorianiteHide

AldaniteA Pb-bearing variety of Thorianite with up to 12 wt.% PbO.

Originally reported from Aldan Shield, Saha Republic (Sakha Republic; Yakutia), Eastern-Siberian Region, Russia.
Cerian ThorianiteA thorianite containing cerium.
UranothorianiteA name for a mineral intermediate between uraninite and thorianite, i.e. a member of the Thorianite-Uraninite Series.

Relationship of Thorianite to other SpeciesHide

Member of:
Other Members of this group:
Cerianite-(Ce)(Ce4+,Th)O2Iso. m3m (4/m 3 2/m) : Fm3m
UraniniteUO2Iso. m3m (4/m 3 2/m) : Fm3m
Forms a series with:

Common AssociatesHide

Associated Minerals Based on Photo Data:
12 photos of Thorianite associated with CalciteCaCO3
5 photos of Thorianite associated with Guarinite(Na, Ca, Zr, Si, F, O)
5 photos of Thorianite associated with DiopsideCaMgSi2O6
4 photos of Thorianite associated with PhlogopiteKMg3(AlSi3O10)(OH)2
3 photos of Thorianite associated with FluorapatiteCa5(PO4)3F
3 photos of Thorianite associated with Tremolite◻Ca2Mg5(Si8O22)(OH)2
2 photos of Thorianite associated with Pyroxene GroupADSi2O6
2 photos of Thorianite associated with BaddeleyiteZrO2
2 photos of Thorianite associated with HiortdahliteNa2Ca4(Ca0.5Zr0.5)Zr(Si2O7)2OF3
2 photos of Thorianite associated with BiotiteK(Fe2+/Mg)2(Al/Fe3+/Mg/Ti)([Si/Al/Fe]2Si2O10)(OH/F)2

Related Minerals - Strunz-mindat GroupingHide

4.DL.05Cerianite-(Ce)(Ce4+,Th)O2Iso. m3m (4/m 3 2/m) : Fm3m
4.DL.05UraniniteUO2Iso. m3m (4/m 3 2/m) : Fm3m
4.DL.05Zirkelite(Ti,Ca,Zr)O2-xIso.
4.DL.05Aeschynite GroupAD2O6
4.DL.10CalzirtiteCa2Zr5Ti2O16Tet. 4/mmm (4/m 2/m 2/m) : I41/acd
4.DL.10Tazheranite(Zr,Ti,Ca)(O,◻)2Iso. m3m (4/m 3 2/m)
4.DL.10HiärneiteCa2Zr4Mn3+SbTiO16Tet. 4/mmm (4/m 2/m 2/m) : I41/acd
4.DL.15VorlaniteCa(U6+)O4Iso. m3m (4/m 3 2/m) : Fm3m

Other InformationHide

Magnetism:
Diamagnetic
Notes:
radioactive
Health Risks:
Contains thorium - always wash hands after handling. Avoid inhaling dust when handling or breaking. Never lick or ingest. Avoid prolonged exposure in proximity of the body. Store away from inhabited areas.

Internet Links for ThorianiteHide

References for ThorianiteHide

Reference List:

Localities for ThorianiteHide

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 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.
Angola
 
  • Huíla Province
    • Quilengues
Argentina
 
  • Catamarca Province
    • Sierra de Ancasti
      • El Portezuelo
  • La Rioja Province
    • Sanagasta department
Australia
 
  • Northern Territory
    • Central Desert Region
      • Harts Range (Harts Ranges; Hartz Range; Hartz Ranges)
        • Ambalindum Station
          • Harding Springs
      • Nolans Bore
    • Coomalie Shire
      • Batchelor
        • Rum Jungle
  • South Australia
    • Roxby Downs
  • Tasmania
    • Waratah-Wynyard municipality
      • Waratah district
        • Waratah
  • Victoria
    • Towong Shire
      • Mitta Mitta
  • Western Australia
    • Halls Creek Shire
Austria
 
  • Lower Austria
    • Krems-Land District
      • Gföhl
        • Felling
    • Zwettl District
      • Kottes-Purk
        • Bernhards
Belgium
 
  • Wallonia
    • Namur
      • Havelange
Bolivia
 
  • Oruro
    • Poopó Province
Botswana
 
  • North-West District
    • Ngamiland West District
Brazil
 
  • Goiás
    • Santa Terezinha de Goiás district
      • Santa Terezinha de Goiás
  • Minas Gerais
    • Poços de Caldas alkaline complex
      • Poços de Caldas
  • Pará
    • Canaã dos Carajás
      • Sossego Mine
    • Parauapebas
      • Alemão Cu deposit
Canada
 
  • British Columbia
    • Kamloops Mining Division
    • Omineca Mining Division
      • Williston Lake
  • Nunavut
    • Qikiqtaaluk Region
      • Baffin Island
        • Kimmirut (Lake Harbour)
  • Ontario
    • Cochrane District
      • South of Ridge Lake Area
    • Haliburton County
      • Highlands East Township
        • Cardiff Township
        • Monmouth Township
      • Hastings Highlands Municipality
        • Monteagle Township
    • Kawartha Lakes
      • Somerville Township
    • Parry Sound District
      • Henvey Township
  • Québec
    • Abitibi-Témiscamingue
      • Témiscamingue RCM
        • Les Lacs-du-Témiscamingue
    • Outaouais
      • Pontiac RCM
        • Otter Lake
    • Saguenay-Lac-Saint-Jean
      • Le Fjord-du-Saguenay RCM
        • Saint-Honoré
China
 
  • Fujian
    • Sanming
      • Mingxi County
  • Gansu
    • Jinchang
      • Jinchuan District
        • Longshoushan Uranium ore zone
  • Inner Mongolia
    • Baotou City (Baotou Prefecture)
      • Bayan Obo mining district
        • Bayan Obo
  • Jiangxi
    • Fuzhou
      • Chongren Co.
        • Xiangshan Uranium ore field
      • Le'an Co.
        • Xiangshan Uranium ore field
          • Zoujiashan ore district
  • Liaoning
    • Dandong
      • Kuandian County
        • Saima complex
[var: Aldanite]
  • Shandong
    • Jining
      • Weishan County
  • Yunnan
    • Honghe
      • Jianshui County
        • Puxiong
Czech Republic
 
  • South Bohemian Region
    • Český Krumlov District
      • Zlatá Koruna
        • Plešovice
  • Vysočina Region
    • Třebíč District
      • Pyšel
DR Congo
 
  • North Kivu
Egypt
 
  • Red Sea Governorate
    • Marsa Alam
    • Northeastern Desert
Finland
 
  • Lapland
    • Enontekiö
  • Pirkanmaa
    • Orivesi
      • Eräjärvi area
  • Southwest Finland
    • Kimitoön (Kemiönsaari)
  • Uusimaa
    • Lohja
      • Palmottu Lake
Germany
 
  • Bavaria
    • Lower Bavaria
      • Passau District
        • Hauzenberg
          • Kropfmühl
  • Rhineland-Palatinate
    • Mayen-Koblenz
      • Mendig
        • Mendig
          • Wingertsberg
      • Pellenz
        • Kruft
    • Vulkaneifel
      • Daun
        • Üdersdorf
Greenland
 
  • Kujalleq
Hungary
 
  • Fejér County
    • Székesfehérvár District
      • Pátka
  • Tolna County
    • Mórágy
India
 
  • Rajasthan
    • Jodhpur Division
      • Barmer District
        • Malani Igneous Province
Iran
 
  • Yazd Province
    • Ardakan County
      • Saghand
    • Bafq County
Iraq
 
  • Sulaymaniyah Governorate
    • Pshdar District
      • Qaladiza
        • Hero
Italy
 
  • Aosta Valley
    • Courmayeur
  • Campania
    • Naples
          • Ercolano
            • San Vito
          • Pollena Trocchia
          • Somma Vesuviana
  • Lazio
    • Latina Province
      • Ponza
        • Ponza Island
    • Viterbo Province
      • Vetralla
      • Viterbo
  • Lombardy
    • Sondrio Province
      • Novate Mezzola
  • Piedmont
    • Cuneo Province
      • Canosio
        • Vallone della Valletta
    • Verbano-Cusio-Ossola Province
  • Trentino-Alto Adige (Trentino-South Tyrol)
    • South Tyrol
      • Burggrafenamt (Burgraviato)
        • Ulten (Ultimo)
Japan
 
  • Ehime Prefecture
    • Inland Sea (Setonaikai)
  • Mie Prefecture
    • Mie District
      • Komono town
        • Yunoyama-onsen
Kyrgyzstan
 
  • Issyk-Kul Region
  • Naryn Region
Madagascar
 
  • Amoron'i Mania
    • Manandriana District
      • Andakatany
  • Androy
    • Ambovombe-Androy
Frank K. Mazdab collectionsample FKM-40; https://www.rockptx.com/fkm-26-to-fkm-50/#FKM-40
    • Bekily District
      • Beraketa
      • Behara
      • Mahaly
      • Maromby
        • Belafa area
        • Esiva
      • Tanandava Atsimo
      • Tranomaro
        • Ambindandrakemba
      • Ambatomivary
  • Diana
    • Ambanja
      • Antsirabe
        • Befitina
  • Ihorombe
    • Ihosy District
      • Soamatasy
  • Tuléar Province (Toliara)
Mali
 
  • Kidal Region
    • Kidal Cercle
Mauritania
 
  • Trarza Region
    • Bir Allah
Mexico
 
  • Oaxaca
    • San Francisco Telixtlahuaca Municipality
      • San Francisco Telixtlahuaca
Mongolia
 
  • Dornogovi Province
    • Khatanbulag District
  • Ömnögovi Province
    • Shara Hulasa Hiid
Mozambique
 
  • Nampula Province
    • Monapo District
  • Zambezia Province
    • Gilé District
Myanmar
 
  • Mandalay Region
    • Pyin-Oo-Lwin District
      • Mogok Township
        • Kyauk-Pyat-That
          • Sakangyi (Sakhan-gyi)
Namibia
 
  • Erongo Region
    • Arandis Constituency
Nepal
 
  • Gandaki Pradesh
    • Kaski District
      • Annapurna Municipality
Niger
 
  • Tillabéri
    • Antigoura
Norway
 
  • Agder
    • Evje og Hornnes
      • Landsverk
  • Vestfold og Telemark
    • Kragerø
      • Sannidal
        • Levang
    • Nome
    • Skien
  • Viken
    • Eidsvoll
      • Minnesund
Oman
 
  • Ash Sharqiyah South Governorate
    • Sal Carbonatite Plugs
Paraguay
 
  • Alto Paraguay Department
Romania
 
  • Bihor County
  • Harghita County
    • Gheorgheni
    • Joseni
Russia
 
  • Buryatia
    • Baunt District
      • Vitim Plateau
    • Eastern Sayan
    • Mama River Basin
      • Maigunda River
    • Severo-Baykalsky District
      • Dovyren Highlands
        • Yoko-Dovyrensky Massif
    • Ulan-Ude
  • Chelyabinsk Oblast
    • Karabash
        • Soimon Valley
    • Kyshtym
    • Miass
    • Vishnevye Mountains
  • Irkutsk Oblast
    • Lake Baikal area
      • Slyudyanka
  • Kabardino-Balkaria
    • Baksan Valley
      • Upper Chegem volcanic caldera (Verkhnechegemskaya caldera)
        • Lakargi Mountain
  • Krasnoyarsk Krai
    • Boguchansky District
      • Chadobets alkaline complex
    • Enisei Range (Yenisei Ridge; Enisei Ridge)
    • Kuragin District
    • Maimecha and Kotui Rivers Basin
    • Taymyrskiy Autonomous Okrug
      • Taimyr Peninsula
        • Putoran Plateau
          • Noril'sk
            • Talnakh Cu-Ni Deposit
  • Murmansk Oblast
    • Belye Tundry Massif
[var: Aldanite]
    • Aldan
    • Polar Yakutia
  • Tuva
  • Zabaykalsky Krai
    • Gazimuro-Zavodsky District
Slovakia
 
  • Košice Region
    • Rožňava District
      • Betliar
    • Trebišov District
South Africa
 
  • Limpopo
    • Mopani District Municipality
      • Ba-Phalaborwa Local Municipality
        • Phalaborwa
  • North West
    • Bojanala Platinum District Municipality
      • Moses Kotane Local Municipality
    • Ngaka Modiri Molema District Municipality
      • Ramotshere Moiloa Local Municipality
  • Northern Cape
    • Namakwa District Municipality
      • Karoo Hoogland Local Municipality
        • Sutherland
Spain
 
  • Catalonia
    • Tarragona
      • Conca de Barberà
        • Vimbodí i Poblet
          • Poblet Monastery
Sri Lanka
 
  • Sabaragamuwa Province
    • Ratnapura District
  • Southern Province
    • Galle District
      • Bentota
Sweden
 
  • Jönköping County
    • Jönköping
      • Gränna
    • Vetlanda
      • Alseda
        • Slättåkra
Tajikistan
 
  • Gorno-Badakhshan
    • Murghob
      • Rangkul
Tanzania
 
  • Kigoma Region
Turkey
 
  • Çanakkale Province
    • Ezine District
  • Eskişehir Province
    • Beylikova District
  • Sivas Province
    • Sivas
UK
 
  • England
    • Cornwall
      • Camborne
        • Beacon
  • Scotland
    • Highland
Ukraine
 
  • Donetsk Oblast
    • Azov Sea Region
USA
 
  • Alaska
    • Haines
    • Matanuska-Susitna Borough
      • Yentna Mining District
    • Nome Census Area
      • Koyuk Mining District
    • Northwest Arctic Borough
      • Fairhaven Mining District
    • Prince of Wales-Hyder Census Area
      • Ketchikan Mining District
        • Prince of Wales Island
          • Bokan Mountain
    • Yukon-Koyukuk Census Area
      • Chandalar Mining District
      • Circle Mining District
      • Hughes Mining District
      • Koyukuk Mining District
      • Shungnak Mining District
  • Colorado
    • Fremont County
    • Larimer County
      • Crystal Mountain Pegmatite Mining District (Storm Mountain Mining District)
        • Storm Mountain
  • Maine
    • Sagadahoc County
      • Topsham
  • Montana
    • Beaverhead County
      • Bloody Dick Mining District (Lehmi Pass Mining District; Bobbit Mining District; Beaverhead Mining District)
    • Granite County
      • Rock Creek Mining District
      • Sapphire Mountains Area
    • Ravalli County
      • Sapphire Mountains Area
  • Nevada
  • New Hampshire
    • Carroll County
      • Conway
        • Redstone
  • New York
    • St. Lawrence County
      • Pitcairn
        • Rose Road
  • Pennsylvania
    • Northampton County
      • Easton
          • C.K. Williams Quarry complex
  • Rhode Island
    • Washington County
      • Westerly
  • Texas
    • Burnet County
    • Culberson County
      • Apache Peak area
      • Sierra Diablo
    • Hudspeth County
  • Virginia
    • Roanoke County
  • Washington
    • Okanogan County
      • Golden Horn Batholith
    • Pend Oreille County
      • Granite Mountain
  • Wyoming
    • Crook County
Zambia
 
  • North-Western Province
    • Solwezi District
 
Mineral and/or Locality  
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