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Koragoite

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Vez-Dara River Valley, Shakhdara Range, Khorog Region, Pamir Mts, Viloyati Mukhtori Gorno-Badakhshan (Viloyati Badakhshoni Kuni), Tajikistan
© Pavel M. Kartashov

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Formula:
(Mn
2+
 
,Fe
3+
 
)
 
3
(Nb,Ta,Ti)
 
2
(Nb,Mn)
 
2
(W,Ta)
 
2
O
 
20
System:MonoclinicLustre:Metallic
Hardness:4 - 5
Name:Named after Aleksei Aleksandrovich Korago (1942–1993), geologist who investigated the formation of river pearls in the Arkhangel'sk district of Russia, and the origin of amber.
This page provides mineralogical data about Koragoite.

Classification of Koragoite

IMA status:Approved
Strunz 8th edition ID:4/D.17-05
Nickel-Strunz 10th (pending) edition ID:4.DE.10

4 : OXIDES (Hydroxides, V[5,6] vanadates, arsenites, antimonites, bismuthites, sulfites, selenites, tellurites, iodates)
D : Metal: Oxygen = 1:2 and similar
E : With medium-sized cations; with various polyhedra
Dana 8th edition ID:8.7.12.1

8 : MULTIPLE OXIDES CONTAINING NIOBIUM,TANTALUM OR TITANIUM
7 : Miscellaneous
mindat.org URL:http://www.mindat.org/min-7140.html
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Type Occurrence of Koragoite

Type Locality:Vez-Dara River Valley, Shakhdara Range, Khorog Region, Pamir Mts, Viloyati Mukhtori Gorno-Badakhshan (Viloyati Badakhshoni Kuni), Tajikistan

Physical Properties of Koragoite

Lustre:Metallic
Hardness (Mohs):4 - 5

Crystallography of Koragoite

Crystal System:Monoclinic

Chemical Properties of Koragoite

Formula:
(Mn
2+
 
,Fe
3+
 
)
 
3
(Nb,Ta,Ti)
 
2
(Nb,Mn)
 
2
(W,Ta)
 
2
O
 
20
Essential elements:Mn, Nb, O, W
All elements listed in formula:Fe, Mn, Nb, O, Ta, Ti, W

Relationship of Koragoite to other Species

Related Minerals - Nickel-Strunz Grouping):

- +
4.DE.05Downeyite
SeO
 
2
4.DE.15Koechlinite
Bi
 
2
MoO
 
6
4.DE.15Russellite
Bi
 
2
WO
 
6
4.DE.15Tungstibite
Sb
3+
2
WO
 
6
4.DE.20Tellurite
TeO
 
2
4.DE.25Paratellurite
TeO
 
2
4.DE.30Bismutotantalite
Bi(Ta,Nb)O
 
4
4.DE.30Bismutocolumbite
Bi(Nb,Ta)O
 
4
4.DE.30Cervantite
Sb
3+
 
Sb
5+
 
O
 
4
4.DE.30Stibiotantalite
Sb(Ta,Nb)O
 
4
4.DE.30Stibiocolumbite
Sb(Nb,Ta)O
 
4
4.DE.30Clinocervantite
Sb
3+
 
Sb
5+
 
O
 
4
4.DE.35Baddeleyite
ZrO
 
2

Other Names for Koragoite

Synonyms:
IMA1994-049
Other Languages:
German:Koragoit
Russian:Корагоит
Spanish:Koragoita

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 Koragoite

Reference List:

- +
Mineralogical Record: 29: 473.

Transactions of the Russian Academy of Sciences/Earth Science Sections: 353A(3): 341-343.

Kristallografiya: 40(3): 469-475.

American Mineralogist (1996): 81: 250.

Internet Links for Koragoite

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  • Raman and XRD data at RRUFF project
  • American Mineralogist Crystal Structure Database
  • Koragoite details from Handbook of Mineralogy (PDF) [Link dead]
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    • Localities for Koragoite

    Hide Locality List
    (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.
    France
     
    • Limousin
      • Corrèze
        • Meymac
    		Ansermet, S., Cuchet, S. & Meisser, N. (2010): Minéralogie de la mine de La grange, Meymac, Corrèze. Le Règne Minéral, 91: 23-31
    Tajikistan
     
    • Viloyati Mukhtori Gorno-Badakhshan (Viloyati Badakhshoni Kuni)
      • Pamir Mts
        • Khorog Region
          • Shakhdara Range
    		Pekov, I. (1998) Minerals First discovered on the territory of the former Soviet Union 369p. Ocean Pictures, Moscow
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    Copyright © Jolyon Ralph and Ida Chau 1993-2011. 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. Mindat does not offer minerals for sale. If you would like to add information to improve the quality of our database, then click here to register. Current server date and time: 21st Jun 2011 02:57:52
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