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Laffittite (Лаффиттит)

Pictures (4 Images total)

Laffittit auf Auripigment
Views (File:
1420535071
): 1081
Laffittit auf Auripigment
Bildbreite: 1,5 mm, Fundort: Getchell Mine, Potosi Mining District, Humboldt Co., Nevada, USA
Copyright: Stephan Wolfsried; Contribution: Hg
Location: USA/Nevada/Humboldt Co./Golconda District/Getchell Mine
Mineral: Laffittite
Image: 1420535071
License: Usage for Mineralienatlas project only
Laffittit auf Auripigment

Bildbreite: 1,5 mm, Fundort: Getchell Mine, Potosi Mining District, Humboldt Co., Nevada, USA

Copyright: Stephan Wolfsried
Contribution: Hg 2015-01-06
Locality: Getchell Mine / Golconda District / Humboldt Co. / Nevada / USA
Laffittit, Realgar und Chabourneit
Views (File:
1561739219
): 443
Laffittit, Realgar und Chabourneit
Kirschroter Laffitit neben hellrotem Realgar und metallisch grauem Chabourneit von Jas Roux im Val Gaudemar, Hautes Alpes, Frankreich. Breite des Stückes etwa 27 mm. Ex. coll. Dr. Sobott, Heidelberg.
Copyright: Klaus Schäfer; Contribution: Klaus Schäfer
Collection: Klaus Schäfer, Collection number: JR-Laff-2-1-1
Location: Frankreich/Provence-Alpes-Côte d'Azur, Region/Hautes-Alpes, Département/Gap, Arrondissement/La Chapelle-en-Valgaudémar/Jas Roux
Mineral: Chabournéite, Laffittite, Realgar
Image: 1561739219
License: Usage for Mineralienatlas project only
Laffittit, Realgar und Chabourneit (SNr: JR-Laff-2-1-1)

Kirschroter Laffitit neben hellrotem Realgar und metallisch grauem Chabourneit von Jas Roux im Val Gaudemar, Hautes Alpes, Frankreich. Breite des Stückes etwa 27 mm. Ex. coll. Dr. Sobott, Heidelberg.

Collection: Klaus Schäfer
Copyright: Klaus Schäfer
Contribution: Klaus Schäfer 2019-06-28
Locality: Jas Roux / La Chapelle-en-Valgaudémar / Gap, Arrondissement / Hautes-Alpes, Département / Provence-Alpes-Côte d'Azur, Region / Frankreich
Laffittit
Views (File:
1701608845
): 26
Laffittit
Getchell Mine Humboldt Co. USA; Bildbreite 2,3 mm
Copyright: Ulrich Hansper; Contribution: Ulrich Hansper
Collection: Ulrich Hansper
Location: USA/Nevada/Humboldt Co./Golconda District/Getchell Mine
Mineral: Laffittite
Image: 1701608845
Rating: 2 (votes: 2)
License: Usage for Mineralienatlas project only
Laffittit

Getchell Mine Humboldt Co. USA; Bildbreite 2,3 mm

Collection: Ulrich Hansper
Copyright: Ulrich Hansper
Contribution: Ulrich Hansper 2023-12-03
Locality: Getchell Mine / Golconda District / Humboldt Co. / Nevada / USA
Laffitit
Views (File:
1701267378
): 33
Laffitit
Getchell Mine Humboldt Co. USA; Bildbreite 1,2 mm
Copyright: Ulrich Hansper; Contribution: Ulrich Hansper
Collection: Ulrich Hansper
Location: USA/Nevada/Humboldt Co./Golconda District/Getchell Mine
Mineral: Laffittite
Image: 1701267378
Rating: 2 (votes: 1)
License: Usage for Mineralienatlas project only
Laffitit

Getchell Mine Humboldt Co. USA; Bildbreite 1,2 mm

Collection: Ulrich Hansper
Copyright: Ulrich Hansper
Contribution: Ulrich Hansper 2023-11-29
Locality: Getchell Mine / Golconda District / Humboldt Co. / Nevada / USA

Collectors Summary

Color bläulichweiß mit numerous purpurfarben-roten internen Reflektionen
Streak color bräunlich rot
Hardness (Mohs) 3.5
Solubility + HCl, HNO3, NaOH
Crystal System monoklin, Aa

Chemism

Chemical formula

AgHgAsS3

Chemical composition

Arsen, Quecksilber, Silber, Schwefel

Unit weight: 479.578322 u; Number of atoms in the formula: 6

Info

Empirical formula:

AgHgAsS3

Element

Symbol

Weight%

Atoms

Atoms%

Atom weight (u)

Sum weight (u)

Sulfur

S

20.06

3

50.00

32.0655000

96.1965000

Arsenic

As

15.62

1

16.67

74.9216020

74.9216020

Silver

Ag

22.49

1

16.67

107.8682200

107.8682200

Mercury

Hg

41.83

1

16.67

200.5920000

200.5920000

Analysis wt%

Ag : 22.28, Hg : 41.43, As : 13.93, Sb : 2.52, S : 19.84 (Ref: berechnet with10At-% Sb)

Strunz 9th edition incl. updates

2.GA.35

2: Sulfide und Sulfosalze (Sulfide, Selenide, Telluride, Arsenide, Antimonide, Bismutide, Sulfarsenite, Sulfantimonite, Sulfbismuthite)
G: Sulfoarsenide, Sulfoantimonide, Sulfobismuthide
A: Insel(Neso)-Sulfarsenide, usw., ohne zusätzlichen Schwefel (S)
35:Laffittit-Gruppe

Lapis Classification

II/E.12-010

II: SULFIDE UND SULFOSALZE (Sulfide, Selenide, Telluride, Arsenide, Antimonide, Bismutide)
E: Sulfosalze (S : As,Sb,Bi = x)
12: Sulfosalze mit Thallium/Quecksilber vorherrschend (x=4,0 - 1,6)

Classification by Hölzel

2.FA.510

2: SULFIDES
F: Sulfarsenites, Sulfantimonites, Sulfbismuthinites Trigonal Pyramids ~[AsS3]3-, ~[SbS3]3-, ~[BiS3]3-
A: Neso Sulfarsenites without additional S
5: Stalderite-Christite-Group

Dana 8th edition

03.04.10.02

03: Sulfides - Sulfosalts
04: Sulfides - Sulfosalts where z/y > 3 - (A+)i (A++)j [By Cz], A=metals, B=semi-metals, C=non-metals

IMA status

Anerkannt von der CNMNC

Mineral status

anerkanntes Mineral

Optical Properties

Color

bläulichweiß mit numerous purpurfarben-roten internen Reflektionen

Streak color

bräunlich rot

Diaphaneity (Transparency)

durchscheinend bis opak

Crystallography

Crystal System

monoklin

Class (H-M)

m

Space Group number

9

Space Group

Aa

Cell parameters a (Å)

7.756

Cell parameters b (Å)

11.334

Cell parameters c (Å)

6.665

Cell parameters a/b or c/a

0.684

Cell parameters c/b

0.588

Cell parameters α

90°

Cell parameters β

115.23

Cell parameters γ

90°

Z

4

Volume (ų)

530.005

X-Ray Powder Diffraction

5.31(50),
3.505(70),
3.198(80),
3.005(80),
2.682(100),
2.133(60),
1.905(50),
1.891(50)

XRD chart Laffittite

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)

3.5

VHN (Hardness Vickers)

115 (25g)

Density (g/cm³)

6.07

6.01 ( ρ calc. Mineralienatlas )

Instability

+ HCl, HNO3, NaOH

Preface

Author (Name, Year)

Johan & Mantienne & Picot, 1974

References

Bulletin de la Société Française Minéralogie et de Cristallographie 97 (1974), 48

Other languages

German

Laffittit

Spanish

Laffittita

English

Laffittite

French

Laffittite

Russian

Лафитит

Russian

Лаффиттит

Japanese

ラフィータイト

CNMNC (IMA)-Number

IMA 1973-031

CNMNC symbol

Symbol

Lft

Locations with GPS information

IDs

GUSID (Global unique identifier short form) xeWa7stYVE6Ag64QcD25qg
GUID (Global unique identifier) EE9AE5C5-58CB-4E54-8083-AE10703DB9AA
Database ID 2113