https://www.edelsteine-neuburg.de
https://www.mineralbox.biz
https://www.mineraliengrosshandel.com
https://weloveminerals.com/
https://www.mineral-bosse.de
'._('einklappen').'
 

Giraudite-(Zn)

Collectors Summary

Color hellgrau mit einem cremfarbenen Farbton
Streak color weiß
Hardness (Mohs) 4.5
Crystal System kubisch, I43m

Chemism

Chemical formula

Cu6(Cu4Zn2)As4Se13

Additional chem. information

Mögliche Beimengungen werden in George 2017 beschrieben, siehe auch Tetraedrit-Gruppe.

Chemical composition

Arsen, Kupfer, Selen, Zink

Unit weight: 2092.487208 u; Number of atoms in the formula: 29

Info

Empirical formula:

Cu6(Cu4Zn2)As4Se13

Element

Symbol

Weight%

Atoms

Atoms%

Atom weight (u)

Sum weight (u)
Copper

Cu

30.37

10

34.48

63.5463000

635.4630000
Zinc

Zn

6.25

2

6.90

65.4094000

130.8188000
Arsenic

As

14.32

4

13.79

74.9216020

299.6864080
Selenium

Se

49.06

13

44.83

78.9630000

1,026.5190000

Analysis wt%

Cu : 30.06, Zn : 3.64, Ag : 3.45, Hg : 0.85, As : 7.72, Sb : 10.05, Se : 41.00, S : 3.01 (Ref: Tschermaks Mineralogische und Petrographische Mitteilungen 82)

Strunz 9th edition incl. updates

2.GB.05

2: Sulfide und Sulfosalze (Sulfide, Selenide, Telluride, Arsenide, Antimonide, Bismutide, Sulfoarsenide, Sulfoantimonide, Sulfobismuthide)
G: Sulfoarsenide, Sulfoantimonide, Sulfobismuthide
B: Insel(Neso)-Sulfarsenide, usw., mit zusätzlichen Schwefel (S)
05:Tennantit-Gruppe

Lapis Classification

II/C.11-030

II: SULFIDE UND SULFOSALZE (Sulfide, Selenide, Telluride, Arsenide, Antimonide, Bismutide)
C: Sulfide mit Metall : S,Se,Te ~ 1:1
11: Tetraedrit-Gruppe

Classification by Hölzel

2.FB.150

2: SULFIDES
F: Sulfarsenites, Sulfantimonites, Sulfbismuthinites Trigonal Pyramids ~[AsS3]3-, ~[SbS3]3-, ~[BiS3]3-
B: Neso Sulfarsenites with additional S
1: Tennantite-Group

Dana 8th edition

03.03.06.05

03: Sulfides - Sulfosalts
03: Sulfides - Sulfosalts where 3 < z/y < 4 - (A+)i (A++)j [By Cz], A=metals, B=semi-metals, C=non-metals
06: Tetrahedrite Group (Isometric: I-43m)

IMA status

Anerkannt von der CNMNC

Mineral status

anerkanntes Mineral

IMA Classification

IMA Classification

 Tetrahedrite Group  ⇒ Giraudite series

Optical Properties

Color

hellgrau mit einem cremfarbenen Farbton

Streak color

weiß

Diaphaneity (Transparency)

opak

Crystallography

Crystal System

kubisch

Class (H-M)

43m

Space Group number

217

Space Group

I43m

Cell parameters a (Å)

10.578

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

2

Volume (ų)

1183.616

X-Ray Powder Diffraction

3.050(100),
2.831(30),
2.497(50),
2.076(40),
1.932(60),
1.868(90),
1.714(40),
1.593(70)
XRD chart Giraudite-(Zn)

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

Physical Properties

Hardness (Mohs)

4.5

VHN (Hardness Vickers)

293 (25g)

Density (g/cm³)

5.75

5.871 ( ρ calc. Mineralienatlas )

(Co-)Type locality

(Co-)Type locality

Frankreich/Auvergne-Rhône-Alpes, Region/Puy-de-Dôme, Département/Issoire, Arrondissement/Chaméane/Uranlagerstätte

Preface

Author (Name, Year)

Johan & Picot & Ruhlmann, 1982

References

Tschermaks Mineralogische und Petrographische Mitteilungen 29 (1982), 151

Moëlo, Y.; Makovicky, E.; Mozgova, N.N.; Jambor, J.L.; Cook, N.J.; Pring, A.; Paar,W.; Nickel, E.H.; Graeser, G.; Karup-Møller, S.; et al. Sulfosalt systematics: A review. Report of the sulfosalt sub-committee of the IMA commission on ore mineralogy. Eur. J. Mineral. 2008, 20, 7–46.

George, L. L., Cook, N. J., & Ciobanu, C. L. (2017). Minor and trace elements in natural tetrahedrite-tennantite: Effects on element partitioning among base metal sulphides. Minerals, 7(2), 17. doi:10.3390/min7020017

IMA group assignments

Other languages

German

Giraudit-(Zn)

Spanish

Giraudita-(Zn)

English

Giraudite-(Zn)

French

Giraudite-(Zn)

Russian

Жиродит

CNMNC (IMA)-Number

IMA 1980-089

CNMNC symbol

Symbol

Gir-Zn

Locations with GPS information

IDs

GUSID (Global unique identifier short form) Mw4vUbBb_kq9p2NhZBfulg
GUID (Global unique identifier) 512F0E33-5BB0-4AFE-BDA7-63616417EE96
Database ID 1387