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Niobocarbide

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About NiobocarbideHide

Formula:
(Nb,Ta)C
Colour:
pinkish-white
Lustre:
Metallic
Hardness:
8
Crystal System:
Isometric
Name:
Named in allusion to its composition, being comprised of NIOBium and carbon, as a CARBIDE.
Isostructural with:
The Nb analogue of tantalcarbide.

Unique combination of elements: the only Nb-C mineral known.

Exact type locality uncertain (possibly the Avrorinskii placer).


Classification of NiobocarbideHide

Approved
Approval Year:
1995
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
1.1.29.1

1 : NATIVE ELEMENTS AND ALLOYS
1 : Metals, other than the Platinum Group

Physical Properties of NiobocarbideHide

Metallic
Transparency:
Opaque
Colour:
pinkish-white
Hardness:

Optical Data of NiobocarbideHide

Type:
Isotropic

Chemical Properties of NiobocarbideHide

Formula:
(Nb,Ta)C
IMA Formula:
NbC

Crystallography of NiobocarbideHide

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

Type Occurrence of NiobocarbideHide

General Appearance of Type Material:
rounded grains to 0.2 mm
Geological Setting of Type Material:
PGM-gold placer
Associated Minerals at Type Locality:

Synonyms of NiobocarbideHide

Other Language Names for NiobocarbideHide

Common AssociatesHide

Associated Minerals Based on Photo Data:
Tantalcarbide5 photos of Niobocarbide associated with Tantalcarbide on mindat.org.

Related Minerals - Nickel-Strunz GroupingHide

1.BA.05CoheniteFe3COrth.
1.BA.10Haxonite(Fe,Ni)23C6Iso. m3m (4/m 3 2/m) : Fm3m
1.BA.10Isovite(Cr,Fe)23C6Iso. m3m (4/m 3 2/m) : Fm3m
1.BA.15TongbaiteCr3C2Orth.
1.BA.20Khamrabaevite(Ti,V,Fe)C
1.BA.20TantalcarbideTaCIso. m3m (4/m 3 2/m) : Fm3m
1.BA.25QusongiteWCHex. 6 m2 : P6m2
1.BA.30YarlongiteCr4Fe4NiC4Hex. 6mm : P63mc

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

1.1.29.2TantalcarbideTaCIso. m3m (4/m 3 2/m) : Fm3m
1.1.29.3QusongiteWCHex. 6 m2 : P6m2

Other InformationHide

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

References for NiobocarbideHide

Reference List:
Sort by Year (asc) | by Year (desc) | by Author (A-Z) | by Author (Z-A)
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 NiobocarbideHide

Localities for NiobocarbideHide

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.
Russia (TL)
 
  • Urals Region
    • Middle Urals
      • 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.)
Mineral and/or Locality  
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