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Laitakarite (Laitakarit)

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Laitakarit und Chalkopyrit
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Laitakarit und Chalkopyrit
L: Silbrig-met. C: Gelb-met. Falu Gruva, Falun, Dalarna, Schweden. 2 x 3 cm.
Copyright: Doc Diether; Contribution: Doc Diether
Collection: Doc Diether
Location: Schweden/Dalarna, Provinz/Falun/Falu Gruva
Mineral: Laitakarite
Image: 1217774098
Rating: 3 (votes: 1)
License: Usage for Mineralienatlas project only
Laitakarit und Chalkopyrit

L: Silbrig-met. C: Gelb-met. Falu Gruva, Falun, Dalarna, Schweden. 2 x 3 cm.
Collection: Doc Diether
Copyright: Doc Diether
Contribution: Doc Diether 2008-08-03
Locality: Falu Gruva / Falun / Dalarna, Provinz / Schweden

Collectors Summary

Color Bleiglanz weiß
Streak color graulich schwarz
Hardness (Mohs) 2.5
Crystal System trigonal, R3m

Chemism

Chemical formula

Bi4(Se,S)3

Chemical composition

Bismut, Selen, Schwefel

Unit weight: 1037.637403 u; Number of atoms in the formula: 7

Info

Empirical formula:

Bi4(Se0.75S0.25)3

Element

Symbol

Weight%

Atoms

Atoms%

Atom weight (u)

Sum weight (u)
Sulfur

S

2.32

0.75

10.71

32.0655000

24.0491250
Selenium

Se

17.12

2.25

32.14

78.9630000

177.6667500
Bismuth

Bi

80.56

4

57.14

208.9803820

835.9215280

Analysis wt%

Bi : 78.28, Se : 15.50, S : 3.28, Pb : 0.78, Ag : 0.71 (Ref: Bull.Comm.Geol.Finlande,60)

Strunz 9th edition incl. updates

2.DC.05

2: Sulfide und Sulfosalze (Sulfide, Selenide, Telluride, Arsenide, Antimonide, Bismutide, Sulfarsenite, Sulfantimonite, Sulfbismuthite)
D: Metallsulfide mit M:S = 3:4 und 2:3
C: M:S variabel
05:Tetradymit-Gruppe

Lapis Classification

II/D.11-020

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

Classification by Hölzel

2.DC.320

2: SULFIDES
D: With Me/S <1/1 and >1/2
C: Me/S Variable
3: Ikunolite-Group

Dana 8th edition

02.06.02.04

02: Sulfide Minerals
06: Sulfides - Including Selenides and Tellurides where Am Bn Xp, with (m+n):p=4:3
02: Joseite Group (Trigonal: R-3m)

IMA status

Anerkannt von der CNMNC

Mineral status

anerkanntes Mineral

Optical Properties

Color

Bleiglanz weiß

Streak color

graulich schwarz

Diaphaneity (Transparency)

opak

Crystallography

Crystal System

trigonal

Class (H-M)

3m

Space Group number

166

Space Group

R3m

Cell parameters a (Å)

4.225

Cell parameters b (Å)

-

Cell parameters c (Å)

39.93

Cell parameters a/b or c/a

9.451

Cell parameters c/b

-

Z

3

Volumne (ų)

617.282

Kristall structure

Cook NJ, Ciobanu CL, Slattery AD, Wade BP, Ehrig K.: The Mixed-Layer Structures of Ikunolite, Laitakarite, Joséite-B and Joséite-A. Minerals Vol. 11, Nr. 9 (2021) Art-Nr. 920.

X-Ray Powder Diffraction

4.425(60),
3.586(60),
3.072(100),
2.246(80),
2.112(80),
1.741(70),
1.538(60),
1.410(60)
XRD chart Laitakarite

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)

2.5

VHN (Hardness Vickers)

66 (100g)

Density (g/cm³)

8.12

8.373 ( ρ calc. Mineralienatlas )

(Co-)Type locality

(Co-)Type locality

Finnland/Varsinais-Suomi, Landschaft/Salo/Kisko/Orijärvi

Preface

Author (Name, Year)

Vorma, 1959

References

Handbook of Mineralogy (Anthony et al.), 1 (1990), 283

Other languages

German

Laitakarit

Spanish

Laitakarita

English

Laitakarite

French

Laitakarite

Russian

Лайтакарит

Simplified Chinese

硫硒铋矿

Alternative Name

English

Selenjoseite

Selenjoséite

Japanese

ライタカリ鉱

CNMNC symbol

Symbol

Ltk

Locations with GPS information