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Niobocarbide (Niobocarbid)

Additional Functions

Collectors Summary

Color bronzegelb
Hardness (Mohs) 7.5
Cleavages keine
Fracture muschelig
Crystal System kubisch, Fm3m

Chemism

Chemical formula

(Nb,Ta)C

Chemical composition

Niob, Tantal, Kohlenstoff

Unit weight: 126.927544 u; Number of atoms in the formula: 2

Info

Empirical formula:

(Nb0.75Ta0.25)C

Element

Symbol

Weight%

Atoms

Atoms%

Atom weight (u)

Sum weight (u)
Carbon

C

9.46

1

50.00

12.0107800

12.0107800
Niobium

Nb

54.90

0.75

37.50

92.9063820

69.6797865
Tantalum

Ta

35.64

0.25

12.50

180.9479100

45.2369775

Strunz 9th edition incl. updates

1.BA.20

1: Elemente (Metalle, intermetallische Legierungen, Metalloide u. Nichtmetalle, Carbide, Silicide, Nitride u. Phosphide)
B: Metallische Kohlenstoffverbindungen (Carbide), Strickstoffverbindungen (Nitride) und Phosphorverbindungen (Phosphide)
A: Carbide
20:Tantalcarbid-Gruppe

Lapis Classification

I/A.09-055

I: ELEMENTE
A: Metalle und intermetallische Verbindungen
9: Carbide, Nitride, Phosphide und Silicide (metallartige Verbindungen)

Classification by Hölzel

1.BA.410

1: ELEMENTS
B: Carbides, Silicides, Phosphides, Nitrides
A: Carbides

Dana 8th edition

01.01.19.03

01: Native Elements and Alloys
01: Native Elements with metallic elements other than the platinum group
19: Osbornite group carbides and nitrides

IMA status

Anerkannt von der CNMNC

Mineral status

anerkanntes Mineral

Optical Properties

Color

bronzegelb

Crystallography

Crystal System

kubisch

Class (H-M)

m3m

Space Group number

225

Space Group

Fm3m

Cell parameters a (Å)

4.45

Cell parameters b (Å)

-

Cell parameters c (Å)

-

Cell parameters a/b or c/a

1

Cell parameters c/b

-

Cell parameters α

90°

Cell parameters β

90°

Cell parameters γ

90°

Z

4

Volume (ų)

88.121

X-Ray Powder Diffraction

2.84(70),
2.56(100),
2.46(60),
2.22(90),
1.574(80),
1.343(80),
1.289(70),
1.285(60)
XRD chart Niobocarbide

Calculated from d-spacing and intensity at 0.1541838 nm (Cu)

Crystals 3D

Open larger view

Crystal Structure 3D

Open larger view

Physical Properties

Hardness (Mohs)

7.5

VHN (Hardness Vickers)

1870 (50g)

Density (g/cm³)

9.3 (berechnet)

9.567 ( ρ calc. Mineralienatlas )

Cleavages

keine

Fracture

muschelig

Tenacity

spröde

(Co-)Type locality

(Co-)Type locality

Russland/Ural, Föderationskreis/Swerdlowsk (Sverdlovskaya, Sverdlovsk), Oblast/Jekaterinburg/Nischni Tagil (Nizhnii Tagil)/Baranchinsky-Massiv/Aktai, Fluss/Aurorinsky Mine (Avrorinskii, Avorinskiy)

Russland/Ural, Föderationskreis/Swerdlowsk (Sverdlovskaya, Sverdlovsk), Oblast/Jekaterinburg/Nischni Tagil (Nizhnii Tagil)/Baranchinsky-Massiv/Aktai, Fluss/Baranchinsky Mine

Preface

Author (Name, Year)

Novgorodova & Generalov & Trubkin, 1997

References

Zapiski Vserossiskogo Mineralogicheskogo Obshchetstva 126 (1997) (1), 76

Other languages

German

Niobocarbid

French

Niobocarbide

English

Niobocarbide

Spanish

Niobocarburo

Russian

Ниобокарбид

CNMNC (IMA)-Number

IMA 1995-035

CNMNC symbol

Symbol

Ncb

IDs

GUSID (Global unique identifier short form) AWbTW_5SdkWUUG3KAMuF0w
GUID (Global unique identifier) 5BD36601-52FE-4576-9450-6DCA00CB85D3
Database ID 2761