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Thalcusite

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Thalcusit
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Thalcusit

REM-Aufnahme; Fundort: Nakalak, Ilimaussaq, Grönland; Funddatum 1964

Copyright: Pavel M. Kartashov
Contribution: slugslayer 2009-06-15
Locality: Nakalak (Nakalaq; Nakkaalaaq) / Tasseq / Ilimaussaq-Komplex / Narsaq / Kommune Kujalleq / Grönland

Collectors Summary

Color rose-grau zu blass lila
Lustre Metallglanz
Hardness (Mohs) 3
Cleavages parallel zur Kornverlängerung
Crystal System tetragonal,

Chemism

Chem­ical formula

(Cu,Fe)4Tl2S4

Chem­ical com­po­si­tion

Eisen, Kupfer, Thallium, Schwefel

Unit weight: 783.51274 u; Number of atoms in the formula: 10

Info

Empirical formula:

(Cu0.75Fe0.25)4Tl2S4

Element

Symbol

Weight%

Atoms

Atoms%

Atom weight (u)

Sum weight (u)

Sulfur

S

16.37

4

40.00

32.0655000

128.2620000

Iron

Fe

7.13

1

10.00

55.8452000

55.8452000

Copper

Cu

24.33

3

30.00

63.5463000

190.6389000

Thallium

Tl

52.17

2

20.00

204.3833200

408.7666400

Anal­y­sis wt%

Ø Cu : 21.60, Tl : 52.80, Fe : 9.50, S : 16.40 (Ref: Zapiski Vsesoyuznogo Mineralogicheskogo Obshchestva, 1904-1974 76)

Strunz 9th edi­tion incl. updates

2.BD.30

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)
30:Thalcusit-Gruppe

Lapis Clas­sifica­tion

II/F.04-030

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

Clas­sifica­tion by Hölzel

2.BD.300

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)

Hey's Chem­ical Index of Min­er­als

03.05.16

03: Sulphides, Selenides, Tellurides, Arsenides and Bismuthides (except the arsenides, antimonides and bismuthides of Cu, Ag and Au, which are included in Section 1)
05: Sulphides etc. of Hg and Tl

Dana 8th edi­tion

02.05.05.01

02: Sulfide Minerals
05: Sulfides - Including Selenides and Tellurides where Am Bn Xp, with (m+n):p=3:2
05: Thalcusite Group

IMA sta­tus

Anerkannt von der CNMNC

Min­eral sta­tus

anerkanntes Mineral

Optical Properties

Color

rose-grau zu blass lila

Diaphane­ity (Trans­parency)

opak

Lus­tre

Metallglanz

Pleochro­ism

schwach; hellgrau mit bräunlichlila Tönung bis dunkelgrau

Anisotropism

moderat; blass gelblich bis sehr dunkelgrau

Reflec­tiv­ity: (Lambda nm) ↓, ↑, Ø

(440) 29.3, 30.7, 30.00
(460) 30.4, 31.3, 30.85
(480) 29.6, 30.1, 29.85
(500) 29.8, 30.8, 30.30
(520) 29.7, 30.8, 30.25
(540) 28.4, 29.9, 29.15
(560) 27.9, 29.8, 28.85
(580) 27.9, 30.3, 29.10
(600) 28.4, 30.3, 29.35
(620) 29.2, 32.1, 30.65
(640) 29.7, 33.0, 31.35
(660) 30.6, 33.7, 32.15
(680) 30.7, 34.5, 32.60
(700) 31.7, 35.9, 33.80

Reflection chart Thalcusite

Reflec­tiv­ity Ø

30.59

Crystallography

Crystal Sys­tem

tetragonal

Cell param­e­ters a (Å)

3.882

Cell param­e­ters b (Å)

-

Cell param­e­ters c (Å)

13.25

Cell param­e­ters a/b or c/a

3.413

Cell param­e­ters c/b

-

Cell param­e­ters α

90°

Cell param­e­ters β

90°

Cell param­e­ters γ

90°

Z

1

Volumne (ų)

199.676

X-Ray Pow­der Diffrac­tion

3.73(80),
3.31(40),
2.91(100),
2.53(100),
2.18(40),
1.941(50),
1.717(50),
1.615(30)

XRD chart Thalcusite

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

VHN (Hard­ness Vick­ers)

82 - 92, Ø 88 (10g)

Density (g/cm³)

6.54 (berechnet) 6.15 (gemessen)

6.515 ( ρ calc. Mineralienatlas )

Cleav­ages

parallel zur Kornverlängerung

Tenac­ity

spröde

(Co-)Type locality

(Co-)Type locality

Russland/Sibirien, Föderationskreis/Krasnojarsk, Region (Krasnojarski krai)/Taimyrhalbinsel (Tajmyr)/Putoran-Plateau/Noril'sk/Talnakh/Mayak (Majak)

Type mate­r­ial

A.E. Fersman Mineralogical Museum, Academy of Sciences, Moskau, Russland

Col­lec­tion number of type mate­r­ial

77165

Preface

Name from

für die Bestandteile Thallium; Cuprum (Kupfer) und Schwefel.

Author (Name, Year)

Kovalenker & Laputina & Evstigneeva & Izoitko, 1976

References

Zapiski Vsesoyuznogo Mineralogicheskogo Obshchestva 105 (1976), 202

Neues Jahrbuch für Mineralogie Abhandlungen 138 (1980), 122

Related minerals "Strunz Classification" (9. Edition) [Mineral | Chemical formula | Crystal system : Class (H-M) : Space Group | Indenture number]

Bukovite

Tl2Cu3FeSe4

tetragonal : 4/mmm : I4/mmm

2.BD.30

Murunskite

K2Cu3FeS4

2.BD.30

Thalcusite

(Cu,Fe)4Tl2S4

2.BD.30

Related minerals "Lapis Classification" [Mineral | Chemical formula | Crystal system : Class (H-M) : Space Group | Indenture number]

Rohaite

TlCu5SbS2

II/F.04-005

Chalcothallite

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

tetragonal : 4/mmm : I4/mmm

II/F.04-006

Colimaite

K3VS4

orthorhombisch : mmm : Pnma

II/F.04-008

Murunskite

K2Cu3FeS4

II/F.04-010

Bukovite

Tl2Cu3FeSe4

tetragonal : 4/mmm : I4/mmm

II/F.04-020

Thalcusite

(Cu,Fe)4Tl2S4

II/F.04-030

Related minerals "Hoelzel Classification" [Mineral | Chemical formula : Crystal system : Class (H-M) | Space Group | Indenture number]

Thalcusite

(Cu,Fe)4Tl2S4

2.BD.300

Bukovite

Tl2Cu3FeSe4

tetragonal : 4/mmm : I4/mmm

2.BD.320

Murunskite

K2Cu3FeS4

2.BD.330

Chvilevaite

Na(Cu,Fe,Zn)2S2

trigonal : 3m : P3m1

2.BD.340

Rohaite

TlCu5SbS2

2.BD.350

Chalcothallite

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

tetragonal : 4/mmm : I4/mmm

2.BD.360

Sabatierite

Cu6TlSe4

2.BD.380

Crookesite

Cu7(Tl,Ag)Se4

tetragonal : 4 : I4

2.BD.390

Related minerals "Dana 8. Classification" [Mineral | Chemical formula : Crystal system : Class (H-M) | Space Group | Indenture number]

Umangite

Cu3Se2

tetragonal : 42m : P421m

02.05.01.01

Bornite

Cu5FeS4

orthorhombisch : mmm : Pbca

02.05.02.01

Heazlewoodite

Ni3S2

trigonal : 32 : R32

02.05.03.01

Oregonite

Ni2FeAs2

02.05.04.01

Thalcusite

(Cu,Fe)4Tl2S4

02.05.05.01

Bukovite

Tl2Cu3FeSe4

tetragonal : 4/mmm : I4/mmm

02.05.05.02

Murunskite

K2Cu3FeS4

02.05.05.03

Argyrodite

Ag8GeS6

orthorhombisch : mm2 : Pna21

02.05.06.01

Canfieldite

Ag8SnS6

orthorhombisch : mm2 : Pna21

02.05.06.02

Imiterite

Ag2HgS2

monoklin : 2/m : P21/c

02.05.08.01

Brodtkorbite

Cu2HgSe2

monoklin : 2/m : P21/n

02.05.08.02

Chvilevaite

Na(Cu,Fe,Zn)2S2

trigonal : 3m : P3m1

02.05.09.01

Related minerals "Hey's Classification" [Mineral | Chemical formula | Crystal system : Class (H-M) : Space Group | Indenture number]

Thalcusite

(Cu,Fe)4Tl2S4

03.05.16

Roquesite

CuInS2

tetragonal : 42m : I42d

03.05.19

Alternative Name

Thalcusita

CNMNC (IMA)-Number

IMA 1975-023

CNMNC symbol

Symbol

Thl

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