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Niobocarbide

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Avrorinskii Placer, Aktai River, Baranchinsky Massif, Nizhnii Tagil, Ekaterinburgskaya (Sverdlovskaya) Oblast', Middle Urals, Urals Region, Russia
© Pavel M. Kartashov

Show Niobocarbide Photos (3)



Formula:
(Nb,Ta)C
System:IsometricColour:pinkish-white
Lustre:MetallicHardness:8
Name:Named in allusion to its composition, being comprised of NIOBium and carbon, as a CARBIDE.


Exact type locality uncertain (possibly the Avrorinskii placer).

Classification of Niobocarbide

IMA status:Approved 1995
Strunz 8th edition ID:1/A.09-55
Nickel-Strunz 10th (pending) edition ID:1.BA.20

1 : ELEMENTS (Metals and intermetallic alloys; metalloids and nonmetals; carbides, silicides, nitrides, phosphides)
B : Metallic Carbides, Silicides, Nitrides and Phosphides
A : Carbides
Dana 8th edition ID:1.1.29.1

1 : NATIVE ELEMENTS AND ALLOYS
1 : Metals, other than the Platinum Group
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Type Occurrence of Niobocarbide

Type Locality:Avrorinskii Placer, Aktai River, Baranchinsky Massif, Nizhnii Tagil, Ekaterinburgskaya (Sverdlovskaya) Oblast', Middle Urals, Urals Region, Russia
Year of Discovery:1997
Geological Setting of type material:PGM-gold placer
Associated Minerals at type locality:
TantalcarbideMagnetiteRutheniumJedwabiteIlmenite

Physical Properties of Niobocarbide

Lustre:Metallic
Diaphaneity (Transparency):Opaque
Colour:pinkish-white
Hardness (Mohs):8

Crystallography of Niobocarbide

Crystal System:Isometric
Class (H-M):m3m (4/m 3 2/m) - Hexoctahedral
Space Group:Fm3m {F4/m 3 2/m}
Cell Parameters:a = 4.45Å
Unit Cell Volume:V 88.1 ų
Z:4
Morphology:octahedrons and cubo-octahedrons

Optical Data of Niobocarbide

Type:Isotropic

Chemical Properties of Niobocarbide

Formula:
(Nb,Ta)C
Essential elements:C, Nb
All elements listed in formula:C, Nb, Ta

Relationship of Niobocarbide to other Species

Related Minerals - Nickel-Strunz Grouping):

- +
1.BA.05Cohenite
(Fe,Ni,Co)
 
3
C
1.BA.10Haxonite
(Fe,Ni)
 
23
C
 
6
1.BA.10Isovite
(Cr,Fe)
 
23
C
 
6
1.BA.15Tongbaite
Cr
 
3
C
 
2
1.BA.20Khamrabaevite
(Ti,V,Fe)C
1.BA.20Tantalcarbide
TaC
1.BA.25Qusongite
WC
1.BA.30Yarlongite
Cr
 
4
Fe
 
4
NiC
 
4

Other Names for Niobocarbide

Synonyms:
IMA1995-035
Other Languages:
Russian:Ниобокарбид

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 Niobocarbide

Reference List:

- +
Novgorodova, M.I., M.E. Generalov & N.V. Trubkin (1997): The new TaC-NbC isomorphic row and niobocarbide - a new mineral from platinum placers of the Urals.- Zapiski Vserossiyskogo Mineralogicheskogo Obshchestva: 126(1), 76-95 (in russian).

Mineralogical Record: 29: 475.

Internet Links for Niobocarbide

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    • Localities for Niobocarbide

    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.
    Russia
     
    • Urals Region
      • Middle Urals
        • Ekaterinburgskaya (Sverdlovskaya) Oblast'
          • Nizhnii Tagil
            • Baranchinsky Massif
              • Aktai River
    		Novgorodova M.I., Generalov M.E., Trubkin N.V. (1997) A new TaC-NbC isomorphous series and Niobocrbide, a new mineral from platinum-bearing placers of the Urals, - ZVMO, 126(1), pp.76-95 (in Rus.)
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