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Petrukite

Collectors Summary

Color grau, braun
Streak color schwarz
Lustre Metallglanz
Hardness (Mohs) 4.75
Crystal System orthorhombisch, Pmn21

Chemism

Chemical formula

(Cu,Ag)2(Fe,Zn)(Sn,In)S4

Chemical composition

Eisen, Indium, Kupfer, Silber, Zink, Zinn, Schwefel

Unit weight: 453.48941 u; Number of atoms in the formula: 8

Info

Empirical formula:

(Cu0.75Ag0.25)2(Fe0.75Zn0.25)(Sn0.75In0.25)S4

Element

Symbol

Weight%

Atoms

Atoms%

Atom weight (u)

Sum weight (u)

Sulfur

S

28.28

4

50.00

32.0655000

128.2620000

Iron

Fe

9.24

0.75

9.38

55.8452000

41.8839000

Copper

Cu

21.02

1.5

18.75

63.5463000

95.3194500

Zinc

Zn

3.61

0.25

3.13

65.4094000

16.3523500

Silver

Ag

11.89

0.5

6.25

107.8682200

53.9341100

Indium

In

6.33

0.25

3.13

114.8183000

28.7045750

Tin

Sn

19.63

0.75

9.38

118.7107000

89.0330250

Analysis wt%

Ø Cu : 27.40, Ag : 0.90, Fe : 12.40, Zn : 3.60, Sn : 24.80, In : 1.30, S : 29.90 (Ref: Canadian Mineralogist 89)

Strunz 9th edition incl. updates

2.KA.05

2: Sulfide und Sulfosalze (Sulfide, Selenide, Telluride, Arsenide, Antimonide, Bismutide, Sulfarsenite, Sulfantimonite, Sulfbismuthite)
K: Sulfoarsenate
A: Unterteilung 2.KA - 2.KB
05:Enargit-Gruppe

Lapis Classification

II/C.06-140

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

Classification by Hölzel

2.CB.710

2: SULFIDES
C: Sulfides (etc) with Me/S=1/1
B: With Zn,Cu (etc), Coordination Number ~[4] Framework of Cornersharing Tetrahedra: Sphalerite-Germanite-Family
7: Enargite-Sulvanite-Group

Dana 8th edition

02.09.18.01

02: Sulfide Minerals
09: Sulfides - Including Selenides and Tellurides where Am Bn Xp, with (m+n):p=1:1

IMA status

Anerkannt von der CNMNC

Mineral status

anerkanntes Mineral

IMA Classification

IMA Classification

Stannite group

Optical Properties

Color

grau, braun

Streak color

schwarz

Diaphaneity (Transparency)

opak

Lustre

Metallglanz

Pleochroism

sehr schwach

Reflectivity Ø

27.96

Crystallography

Crystal System

orthorhombisch

Class (H-M)

mm2

Space Group number

31

Space Group

Pmn21

Cell parameters a (Å)

7.667

Cell parameters b (Å)

6.440

Cell parameters c (Å)

6.261

Cell parameters a/b or c/a

1.191

Cell parameters c/b

0.972

Cell parameters α

90°

Cell parameters β

90°

Cell parameters γ

90°

Z

2

Volume (ų)

309.14

X-Ray Powder Diffraction

3.13(100),
2.712(40),
1.915(60),
1.636(50),
1.243(50),
1.106(60),
1.044(30)

XRD chart Petrukite

Calculated from d-spacing and intensity at 0.1541838 nm (Cu)

Crystals 3D

Open larger view

Physical Properties

Hardness (Mohs)

4.75

VHN (Hardness Vickers)

319 (100g)

Density (g/cm³)

4.61

4.872 ( ρ calc. Mineralienatlas )

Preface

Name from

William Petruk (geboren 1930), kanadischer Mineraloge welcher die mögliche Existenz des Minerals bei seiner Studie der Mount Pleasant Erzlagerstätte bemerkte.

Author (Name, Year)

Kissin & Owens, 1989

References

Kissin, S.A. & Owens, D.R. - The relatives of stannite in the light of new data. - Canadian Mineralogist 27 (1989), 673

Petruk W. - Tin sulphides from the deposit of Brunswick Tin Mines, Limited. Canadian Mineralogist 12 (1973), 46-54

IMA group assignments

Other languages

German

Petrukit

Spanish

Petrukita

French

Petrukite

English

Petrukite

Russian

Петрукит

CNMNC (IMA)-Number

IMA 1985-052

CNMNC symbol

Symbol

Ptk

Locations with GPS information

IDs

GUSID (Global unique identifier short form) NZBAhdVcOkeNXP6Oy91OKw
GUID (Global unique identifier) 85409035-5CD5-473A-8D5C-FE8ECBDD4E2B
Database ID 3016