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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, Sulfarsenite, Sulfantimonite, Sulfbismuthite)
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

Volumne (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 )

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

Automatic Links to external internet sources (Responsibility is with the operator)

German pages

DeWikiPedia - search for: Giraudit-(Zn)
Google-Bilder-Suche - search for: Giraudit-(Zn)
Mineralienatlas.de (Forum) - search for: Giraudit-(Zn)

English pages

Mindat - search for: Giraudite-(Zn)
Webmineral - search for:Giraudite-(Zn)
Handbook-of-Mineralogy - search for: Giraudite-(Zn)
RRUFF - Raman, XRD and other mineral data - search for: Giraudite-(Zn)
RRUFF - References and PDF downloads - search for: Giraudite-(Zn)
American-Mineralogist-Crystal-Structure-Database - search for: Giraudite-(Zn)
Strahlen.org - search for: Giraudite-(Zn)

Russian pages

Webmineral.ru - search for: Жиродит

Mineral Dealer

German pages

hausen - Mineralgroßhandel - search for: Giraudit-(Zn)
Crystal-Treasure.com - search for: Giraudit-(Zn)
Bosse - search for: Giraudit-(Zn)
Edelsteine Neuburg - Gundolf Fischer - search for: Giraudit-(Zn)

Locations with GPS information