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Jedwabite

Additional Functions

Collectors Summary

Color graugelb, grauweiß in reflektiertem Licht
Lustre Metallglanz
Hardness (Mohs) 6.5
Cleavages nicht beobachtet
Fracture uneben
Crystal System hexagonal, P63mc, P62c, P63/mmc

Chemism

Chemical formula

Fe7(Ta,Nb)3

Chemical composition

Eisen, Niob, Tantal

Unit weight: 867.728984 u; Number of atoms in the formula: 10

Info

Empirical formula:

Fe7(Ta0.75Nb0.25)3

Element

Symbol

Weight%

Atoms

Atoms%

Atom weight (u)

Sum weight (u)
Iron

Fe

45.05

7

70.00

55.8452000

390.9164000
Niobium

Nb

8.03

0.75

7.50

92.9063820

69.6797865
Tantalum

Ta

46.92

2.25

22.50

180.9479100

407.1327975

Analysis wt%

Ø Ta : 35.33, Nb : 13.05, Fe : 44.40, Mn : 0.60, Sn : 2.06, W : 3.07, Si : 1.54 (Ref: Zapiski Vsesoyuznogo Mineralogicheskogo Obshchestva, 1904-1974 97)

Strunz 9th edition incl. updates

1.AE.25

1: Elemente (Metalle, intermetallische Legierungen, Metalloide u. Nichtmetalle, Carbide, Silicide, Nitride u. Phosphide)
A: Metalle und intermetallische Legierungen
E: Eisen-Chrom-Familie
25:Jedwabit-Gruppe

Lapis Classification

I/A.08-050

I: ELEMENTE
A: Metalle und intermetallische Verbindungen

Classification by Hölzel

1.AF.400

1: ELEMENTS
A: Metals, Intermetallic Compounds, and Alloys
F: Fe-Cr-Group
4: hexagonal with Nb, Ta

Dana 8th edition

01.01.34.01

01: Native Elements and Alloys
01: Native Elements with metallic elements other than the platinum group

IMA status

Anerkannt von der CNMNC

Mineral status

anerkanntes Mineral

Optical Properties

Color

graugelb, grauweiß in reflektiertem Licht

Lustre

Metallglanz

Crystallography

Crystal System

hexagonal

Class (H-M)

6mm, 6m2, 6/mmm

Space Group number

186, 190, 194

Space Group

P63mc, P62c, P63/mmc

Cell parameters a (Å)

4.81

Cell parameters b (Å)

-

Cell parameters c (Å)

7.87

Cell parameters a/b or c/a

1.636

Cell parameters c/b

-

Cell parameters α

90°

Cell parameters β

90°

Cell parameters γ

120°

Z

1

Volume (ų)

157.687

X-Ray Powder Diffraction

2.40(3),
2.19(7),
2.11(3),
2.05(10),
2.01(6),
1.509(5),
1.347(8),
1.314(4)
XRD chart Jedwabite

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

Crystals 3D

Open larger view

Physical Properties

Hardness (Mohs)

6.5

VHN (Hardness Vickers)

1050 (50g)

Density (g/cm³)

8.91 (berechnet)

9.137 ( ρ calc. Mineralienatlas )

Cleavages

nicht beobachtet

Fracture

uneben

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

Name from

Jacques Jedwab, Université Libre de Bruxelles, Belgien

Author (Name, Year)

Novgorodova & Generalov & Trubkin, 1997

References

Mineralogical Record 29, 472.

Zapiski Vserossiskogo Mineralogicheskogo Obshchetstva 126 (1997) (2), 100.

American Mineralogist 83 (1998), 654 (Zusammenfassung).

Other languages

German

Jedwabit

Spanish

Jedwabita

French

Jedwabite

English

Jedwabite

Russian

Жедвабит

Alternative Name

German

Jedvabit

Spanish

Jedvabita

Jedvabite

CNMNC (IMA)-Number

IMA 1995-043

CNMNC symbol

Symbol

Jed

IDs

GUSID (Global unique identifier short form) MwRSG9EDc06Yr8lds0kLjQ
GUID (Global unique identifier) 1B520433-03D1-4E73-98AF-C95DB3490B8D
Database ID 1782