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Aktashite (Aktashit)

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Aktashit
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Aktashit
Bildbreite: 1 cm, Fundort: Moctezuma, Sonora, Mexiko
Copyright: Rob Lavinsky; Contribution: thdun5
Location: Mexiko/Sonora/Moctezuma, Municipio/Moctezuma
Mineral: Aktashite
Image: 1377869533
License: Usage for Mineralienatlas project only
Aktashit

Bildbreite: 1 cm, Fundort: Moctezuma, Sonora, Mexiko

Copyright: Rob Lavinsky
Contribution: thdun5 2013-08-30
Locality: Moctezuma / Moctezuma, Municipio / Sonora / Mexiko

Collectors Summary

Color grauschwarz-met.
Streak color schwarz
Hardness (Mohs) 3.5
Solubility +++ HNO3 - andere Standardätzreagentien
Crystal System trigonal, R3

Chemism

Chemical formula

Cu6Hg3As4S12

Chemical composition

Arsen, Kupfer, Quecksilber, Schwefel

Unit weight: 1667.526208 u; Number of atoms in the formula: 25

Info

Empirical formula:

Cu6Hg3As4S12

Element

Symbol

Weight%

Atoms

Atoms%

Atom weight (u)

Sum weight (u)

Sulfur

S

23.08

12

48.00

32.0655000

384.7860000

Copper

Cu

22.86

6

24.00

63.5463000

381.2778000

Arsenic

As

17.97

4

16.00

74.9216020

299.6864080

Mercury

Hg

36.09

3

12.00

200.5920000

601.7760000

Analysis wt%

Ø Hg : 32.54, Cu : 23.38, As : 18.20, Sb : 2.55, S : 23.80 (Ref: Izd.Nauk.Moscow,68)

Strunz 9th edition incl. updates

2.GA.30

2: Sulfide und Sulfosalze (Sulfide, Selenide, Telluride, Arsenide, Antimonide, Bismutide, Sulfarsenite, Sulfantimonite, Sulfbismuthite)
G: Sulfoarsenide, Sulfoantimonide, Sulfobismuthide
A: Insel(Neso)-Sulfarsenide, usw., ohne zusätzlichen Schwefel (S)
30:Nowackiit-Gruppe

Lapis Classification

II/C.12-030

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

Classification by Hölzel

2.FA.420

2: SULFIDES
F: Sulfarsenites, Sulfantimonites, Sulfbismuthinites Trigonal Pyramids ~[AsS3]3-, ~[SbS3]3-, ~[BiS3]3-
A: Neso Sulfarsenites without additional S
4: Nowackiite-Group

Dana 8th edition

03.04.13.02

03: Sulfides - Sulfosalts
04: Sulfides - Sulfosalts where z/y > 3 - (A+)i (A++)j [By Cz], A=metals, B=semi-metals, C=non-metals

IMA status

Ohne Prüfung durch die CNMNC veröffentlicht

Optical Properties

Color

grauschwarz-met.

Streak color

schwarz

Crystallography

Crystal System

trigonal

Class (H-M)

3

Space Group number

146

Space Group

R3

Cell parameters a (Å)

13.73

Cell parameters b (Å)

-

Cell parameters c (Å)

9.329

Cell parameters a/b or c/a

0.679

Cell parameters c/b

-

Z

3

Volumne (ų)

1523.024

X-Ray Powder Diffraction

4.04(20),
3.10(100),
3.10(100),
2.69(70),
1.903(100),
1.621(100),
1.554(20),
1.345(30)

XRD chart Aktashite

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)

3.5

VHN (Hardness Vickers)

313 (50g)

Density (g/cm³)

5.71 (berechnet)

5.454 ( ρ calc. Mineralienatlas )

Instability

+++ HNO3 - andere Standardätzreagentien

Preface

Author (Name, Year)

Vasil'ev, 1968

References

Transactions (Doklady) of the USSR Academy of Sciences, Earth Science Sections 206 (1972), 127

Other languages

German

Aktashit

Spanish

Aktashita

English

Aktashite

French

Aktashite

Russian

Акташит

Simplified Chinese

硫砷汞铜矿

Japanese

アクタシ鉱

CNMNC symbol

Symbol

Ats

Locations with GPS information