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Ferrithorite

Big Photo

Khaldzan Buragtag massif, Altai Mts, Hovd Aimag (Khovd Aimag), Mongolia
© Pavel M. Kartashov

Formula:
(Th,Fe
3+
 
,Fe
2+
 
)[(Si,Al)O
 
4
]
Colour:Orange
A variety of Thorite

An iron(III)-rich variety of Thorite.
Originally reported from Aktyuz REE deposit, Kyrgyzstan.

Classification of Ferrithorite

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Physical Properties of Ferrithorite

Lustre:Waxy
Colour:Orange
Density (measured):4.96 g/cm3

Chemical Properties of Ferrithorite

Formula:
(Th,Fe
3+
 
,Fe
2+
 
)[(Si,Al)O
 
4
]
All elements listed in formula:Al, Fe, O, Si, Th
Analyical Data:Analysis of material from Aktyuz REE deposit, Kyrgyzstan 
P2O5 (0.88)
As2O5 (0.51)
SiO2 (10.22)
TiO2 (0.13)
ThO2 (51.47)
U3O8 (0.41)
Al2O3 (4.10)
Fe2O3 (12.02)
REE2O3 (5.59)
MgO (0.12)
CaO (1.62)
MnO (1.93)
FeO (3.55)
CuO (0.23)
(Na,K)2O (0.26)
H2O (5.64)
Cl (0.20)

sum 98.88 wt.-%

Other Names for Ferrithorite

Synonyms:
Ferri-orangite (of Kalinin)Ferrothorite (of Lacroix)
Other Languages:

Other Information

Health Warning:No information on health risks for this material has been entered into the database. You should always treat mineral specimens with care.

References for Ferrithorite

Reference List:Starik, I. E., Kravchenko, L. L. and Melikova, O. S. (1941), Doklady AN SSSR 32, N4, 254.

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    Localities for Ferrithorite

    (TL) indicates type locality. ? 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.
    Kazakhstan
     
    • Zhezqazghan Oblysy (Dzezkazgan Oblast'; Dzhezkazgan Oblast'; Djezkazgan Oblast'; Jezkazgan Oblast')
      • Mointy (Moyynty)
        • Mointy Railway Station
    		A.V. Stepanov data
    Kyrgyzstan
     
    Starik, I. E., Kravchenko, L. L. and Melikova, O. S. (1941), Doklady AN SSSR 32, N4, 254
    Mongolia
     
    • Hovd Aimag (Khovd Aimag)
      • Altai Mts
    		P.M. Kartashov data
    Russia
     
    • Eastern-Siberian Region
      • Tuva Republic
    		P. Kartashov data
    Mineral and/or Locality
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    Copyright © Jolyon & Ida Ralph 1993-2008. Site Map. Locality, mineral & photograph data are the copyright of the individuals who submitted them.Further information contact the Site hosted & developed by Jolyon Ralph. Mindat.org is an online information resource dedicated to providing free mineralogical information to all. Mindat relies on the contributions of hundreds of members and supporters. If you would like to add information to improve the quality of our database, then click here to register.