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Chalcothallite

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Chalkothallit
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Chalkothallit
Tasseg, Illimaussaq, Grönland. BB: 1,3cm; Ex. R. Feigl Sammlung.
Copyright: Mabu; Contribution: Mabu
Location: Grönland/Kommune Kujalleq/Narsaq/Ilimaussaq-Komplex/Tasseq/Tasseq-Hänge (Taseq-Hänge)
Mineral: Chalcothallite
Image: 1549118964
License: Usage for Mineralienatlas project only
Chalkothallit

Tasseg, Illimaussaq, Grönland. BB: 1,3cm; Ex. R. Feigl Sammlung.
Copyright: Mabu
Contribution: Mabu 2019-02-02
Locality: Tasseq-Hänge (Taseq-Hänge) / Tasseq / Ilimaussaq-Komplex / Narsaq / Kommune Kujalleq / Grönland

Collectors Summary

Color bleigrau, schwarz-met.
Streak color schwarz
Hardness (Mohs) 2.00 - 2.50
Crystal System tetragonal, I4/mmm

Chemism

Chemical formula

(Tl,K)2Cu5.5(Fe,Ag)SbS4

Chemical composition

Antimon, Eisen, Kupfer, Silber, Thallium, Kalium, Schwefel

Unit weight: 994.50184 u; Number of atoms in the formula: 13.5

Info

Empirical formula:

(Tl0.75K0.25)2Cu5.5(Fe0.75Ag0.25)SbS4

Element

Symbol

Weight%

Atoms

Atoms%

Atom weight (u)

Sum weight (u)
Sulfur

S

12.90

4

29.63

32.0655000

128.2620000
Potassium

K

1.97

0.5

3.70

39.0983100

19.5491550
Iron

Fe

4.21

0.75

5.56

55.8452000

41.8839000
Copper

Cu

35.14

5.5

40.74

63.5463000

349.5046500
Silver

Ag

2.71

0.25

1.85

107.8682200

26.9670550
Antimony

Sb

12.24

1

7.41

121.7601000

121.7601000
Thallium

Tl

30.83

1.5

11.11

204.3833200

306.5749800

Analysis wt%

Tl : 38.07, Cu : 40.58, Fe : 3.79, S : 12.06, Sb : 3.93 (Ref: Medd.Gr.67)

Strunz 9th edition incl. updates

2.BD.40

2: Sulfide und Sulfosalze (Sulfide, Selenide, Telluride, Arsenide, Antimonide, Bismutide, Sulfarsenite, Sulfantimonite, Sulfbismuthite)
B: Metallsulfide, M : S > 1 : 1 (hauptsächlich 2 : 1)
D: mit Quecksilber (Hg), Thallium (Tl)
40:Chalkothallit-Gruppe

Lapis Classification

II/F.04-006

II: SULFIDE UND SULFOSALZE (Sulfide, Selenide, Telluride, Arsenide, Antimonide, Bismutide)
F: Sulfide mit nichtmetallischem Charakter
4: Alkalisulfide

Classification by Hölzel

2.BD.360

2: SULFIDES
B: Sulfides (etc) with Me/S > 1/1 (mostly 2/1)
D: With Hg,Tl,(Na,K)
3: Thalcusite-Sabatierite-Group (with Tl,K)

Dana 8th edition

03.02.07.01

03: Sulfides - Sulfosalts
02: Sulfides - Sulfosalts where z/y = 4 - (A+)i (A++)j [By Cz], A=metals, B=semi-metals, C=non-metals

IMA status

Anerkannt von der CNMNC

Mineral status

anerkanntes Mineral

Optical Properties

Color

bleigrau, schwarz-met.

Streak color

schwarz

Crystallography

Crystal System

tetragonal

Class (H-M)

4/mmm

Space Group number

139

Space Group

I4/mmm

Cell parameters a (Å)

3.827

Cell parameters b (Å)

-

Cell parameters c (Å)

34.280

Cell parameters a/b or c/a

8.957

Cell parameters c/b

-

Cell parameters α

90°

Cell parameters β

90°

Cell parameters γ

90°

Z

2

Volumne (ų)

502.062

X-Ray Powder Diffraction

3.65(30),
3.43(30),
3.02(100),
2.59(30),
2.45(30),
2.30(30),
2.17(40),
1.917(50)
XRD chart Chalcothallite

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)

2.00 - 2.50

VHN (Hardness Vickers)

71 (50g)

Density (g/cm³)

6.6 (gemessen)

6.578 ( ρ calc. Mineralienatlas )

(Co-)Type locality

(Co-)Type locality

Grönland/Kommune Kujalleq/Narsaq/Ilimaussaq-Komplex/Tasseq/Nakalak (Nakalaq; Nakkaalaaq)

Grönland/Kommune Kujalleq/Narsaq/Ilimaussaq-Komplex/Tasseq/Tasseq-Hänge (Taseq-Hänge)

Preface

Author (Name, Year)

Semenov & Sørensen & Bezsmertnaya & Novorossova, 1967

References

Handbook of Mineralogy (Anthony et al.), 1 (1990), 91

Other languages

Spanish

Calcotalita

French

Chalcothallite

English

Chalcothallite

German

Chalkothallit

Russian

Халькоталлит

Simplified Chinese

硫锑铊铁铜矿

Alternative Name

German

Chalcothallit

Spanish

Chalcothallita

CNMNC (IMA)-Number

IMA 1966-008

CNMNC symbol

Symbol

Ccth

Locations with GPS information