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Guettardite

Pictures (2 Images total)

Guettardit
Views (File:
1185985095
): 1400
Guettardit
Seravezza, Apuanische Alpen, Lucca-Provinz, Toskana, Italien; Bildbreite: 7 mm
Copyright: Sandro Maggia; Contribution: Philip Blümner
Location: Italien/Toskana (Toscana)/Massa-Carrara, Provinz/Seravezza/Seravezza-Steinbrüche (Cave di Seravezza)
Mineral: Guettardite
Image: 1185985095
Rating: 8 (votes: 1)
License: Usage for Mineralienatlas project only
Guettardit

Seravezza, Apuanische Alpen, Lucca-Provinz, Toskana, Italien; Bildbreite: 7 mm

Copyright: Sandro Maggia
Contribution: Philip Blümner 2007-08-01
Locality: Seravezza-Steinbrüche (Cave di Seravezza) / Seravezza / Massa-Carrara, Provinz / Toskana (Toscana) / Italien
Guettardit
Views (File:
1289049256
): 983
Guettardit
Größe: 3,91 mm; Fundort: Seravezza, Apuanische Alpen, Lucca-Provinz, Toskana, Italien
Copyright: Matteo Chinellato; Contribution: Hg
Collection: Domenico Preite
Location: Italien/Toskana (Toscana)/Massa-Carrara, Provinz/Seravezza/Seravezza-Steinbrüche (Cave di Seravezza)
Mineral: Guettardite
Image: 1289049256
Rating: 8 (votes: 1)
License: Usage for Mineralienatlas project only
Guettardit

Größe: 3,91 mm; Fundort: Seravezza, Apuanische Alpen, Lucca-Provinz, Toskana, Italien

Collection: Domenico Preite
Copyright: Matteo Chinellato
Contribution: Hg 2010-11-06
Locality: Seravezza-Steinbrüche (Cave di Seravezza) / Seravezza / Massa-Carrara, Provinz / Toskana (Toscana) / Italien

Collectors Summary

Color weiß mit rötlich internen Reflektionen
Streak color bräunlich
Hardness (Mohs) 4
Solubility HNO3: tarnt sich schwarz
Crystal System monoklin, P21/a

Additional information / Summary

Möglicherweise identisch mit Twinnit

Moëlo, Y. et al. (2008) Sulfosalt systematics: a review. Report of the sulfosalt sub-committee of the IMA Commission on Ore Mineralogy. Eur. J. Mineral., 20, 7-46.

Chemism

Chemical formula

Pb(Sb,As)2S4

Chemical composition

Antimon, Arsen, Blei, Schwefel

Unit weight: 555.572951 u; Number of atoms in the formula: 7

Info

Empirical formula:

Pb(Sb0.75As0.25)2S4

Element

Symbol

Weight%

Atoms

Atoms%

Atom weight (u)

Sum weight (u)

Sulfur

S

23.09

4

57.14

32.0655000

128.2620000

Arsenic

As

6.74

0.5

7.14

74.9216020

37.4608010

Antimony

Sb

32.87

1.5

21.43

121.7601000

182.6401500

Lead

Pb

37.30

1

14.29

207.2100000

207.2100000

Analysis wt%

Ø Pb : 44.00, Sb : 22.00, As : 12.25, S : 21.00 (Ref: Canadian Mineralogist 67)

Strunz 9th edition incl. updates

2.HC.05

2: Sulfide und Sulfosalze (Sulfide, Selenide, Telluride, Arsenide, Antimonide, Bismutide, Sulfoarsenide, Sulfoantimonide, Sulfobismuthide)
H: Sulfosalze mit SnS als Vorbild
C: Nur mit [Blei] (Pb)
05:Sartorit-Gruppe

Lapis Classification

II/E.25-040

II: SULFIDE UND SULFOSALZE (Sulfide, Selenide, Telluride, Arsenide, Antimonide, Bismutide)
E: Sulfosalze (S : As,Sb,Bi = x)
25: Blei-Sulfosalze mit As/Sb (x= 2,3 - 1,8)

Classification by Hölzel

2.GC.350

2: SULFIDES
G: SnS Archetype
C:
3: Madocite-Guettardite Series

Dana 8th edition

03.07.08.02

03: Sulfides - Sulfosalts
07: Sulfides - Sulfosalts where z/y = 2 - (A+)i (A++)j [By Cz], A=metals, B=semi-metals, C=non-metals
08: Sartorite Group

IMA status

Anerkannt von der CNMNC

Mineral status

anerkanntes Mineral

Optical Properties

Color

weiß mit rötlich internen Reflektionen

Streak color

bräunlich

Diaphaneity (Transparency)

opak

Crystallography

Crystal System

monoklin

Class (H-M)

2/m

Space Group number

14

Space Group

P21/a

Cell parameters a (Å)

20.095

Cell parameters b (Å)

7.946

Cell parameters c (Å)

8.783

Cell parameters a/b or c/a

2.529

Cell parameters c/b

1.105

Cell parameters α

90°

Cell parameters β

101.20

Cell parameters γ

90°

Z

8

Volume (ų)

1375.715

X-Ray Powder Diffraction

9.89(30),
4.19(50),
3.90(50),
3.52(100),
2.795(90),
2.670(50),
2.653(50),
2.334(40)

XRD chart Guettardite

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)

4

VHN (Hardness Vickers)

187 (50g)

Density (g/cm³)

5.31

5.364 ( ρ calc. Mineralienatlas )

Instability

HNO3: tarnt sich schwarz

Preface

Author (Name, Year)

Jambor, 1967

References

Canadian Mineralogist 9 (1967), 191

Other languages

German

Guettardit

Spanish

Guettardita

French

Guettardite

English

Guettardite

Russian

Геттардит

Japanese

グェッタード鉱

CNMNC (IMA)-Number

IMA 1966-018

CNMNC symbol

Symbol

Gue

Locations with GPS information

IDs

GUSID (Global unique identifier short form) PnAB3ZetfUeBwMrqcsGGsA
GUID (Global unique identifier) DD01703E-AD97-477D-81C0-CAEA72C186B0
Database ID 1472