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Erazoite

Collectors Summary

Color schwarz
Crystal System trigonal, R3m

Chemism

Chemical formula

Cu4SnS6

Empirical formula (analysis)

Cu3.74Sn0.99In0.01S6

Chemical composition

Kupfer, Zinn, Schwefel

Unit weight: 548.727938 u; Number of atoms in the formula: 10.74

Info

Empirical formula:

Cu3.74Sn0.99In0.01S6

Element

Symbol

Weight%

Atoms

Atoms%

Atom weight (u)

Sum weight (u)
Sulfur

S

35.06

6

55.87

32.0655000

192.3930000
Copper

Cu

43.31

3.74

34.82

63.5463000

237.6631620
Indium

In

0.21

0.01

0.09

114.8183000

1.1481830
Tin

Sn

21.42

0.99

9.22

118.7107000

117.5235930

Analysis wt%

Cu : 42.46,
Sn : 20.99,
Fe : 0.01,
In : 0.26,
S : 34.42,
Total : 98.14 wt.%

Strunz 9th edition incl. updates

2.BA.

2: Sulfide und Sulfosalze (Sulfide, Selenide, Telluride, Arsenide, Antimonide, Bismutide, Sulfoarsenide, Sulfoantimonide, Sulfobismuthide)
B: Metallsulfide, M : S > 1 : 1 (hauptsächlich 2 : 1)
A: mit Kupfer (Cu), Silber (Ag), Gold (Au)

Lapis Classification

II/C.22-050

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

IMA status

von der CNMNC anerkanntes Mineral, CNMNC Newsletter No. 23, Februar 2015

Mineral status

anerkanntes Mineral

Optical Properties

Color

schwarz

Change in color

Seine Farbe im reflektierten polarisierten Licht ist grau mit Reflexionswerten von 19,7 bis 27,2 (Ro, Re bei 589 nm)

Pleochroism

rosa bis grau gegen Fahlerz

Anisotropism

Starke Anisotropie mit charakteristischem orangen-braungelben zu tiefroten-braunen bis schlammigen grünen Farben

Reflectivity: (Lambda nm) ↓, ↑, Ø

(589)19.7, 27.2, 23.4
Reflection chart Erazoite

Reflectivity Ø

23.4

Crystallography

Crystal System

trigonal

Class (H-M)

3m

Space Group number

166

Space Group

R3m

Cell parameters a (Å)

3.756(8)

Cell parameters b (Å)

-

Cell parameters c (Å)

32.91(4)

Cell parameters a/b or c/a

8.762

Cell parameters c/b

-

Z

2

Volume (ų)

402.077

X-Ray Powder Diffraction

3.664(8), 3.265(8), 3.022(100), 2.313(7), 1.999(10), 1.877(47), 1.667(13), 1.592(12)
XRD chart Erazoite

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

Crystal Structure 3D

Open larger view

Physical Properties

Density (g/cm³)

4.532 ( ρ calc. Mineralienatlas )

(Co-)Type locality

(Co-)Type locality

Chile/Antofagasta, Region (II. Region)/Antofagasta, Provinz/Taltal, Comuna/Santa Catalina/El Guanaco Erzlagerstätte (Huanaco)/Soledad property/Chilena Mine

Type material

Mineralogisches Museum der Universität Hamburg

Collection number of type material

MD 717

Paragenesis of type material

rundliche Kristalle eingeschlossen in Baryt

Preface

Author (Name, Year)

Jochen Schlüter, Thomas Malcherek, Chris Stanley, Maurizio Dini and Arturo A. Molina Donoso

References

Schlüter, J., Malcherek, T., Stanley, C., Dini, M. and Molina Donoso, A.A. (2015) Erazoite, IMA 2014-061. CNMNC Newsletter No. 23, February 2015, page 52; Mineralogical Magazine, 79, 51-58.

Other languages

German

Erazoit

English

Erazoite

Russian

Эразоит

CNMNC (IMA)-Number

IMA 2014-061

CNMNC symbol

Symbol

Erz

Locations with GPS information

IDs

GUSID (Global unique identifier short form) LQkoSUTv4kOD2DpHupevoQ
GUID (Global unique identifier) 4928092D-EF44-43E2-83D8-3A47BA97AFA1
Database ID 7863