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Launayite

Pictures (1 Images total)

Launayit
Views (File:
1703710228
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Launayit
Kleine Launayit-Kristallgruppe (ohne Maßstab; REM-EDX analysiert) von der Typlokalität Taylor Pit, Madoc, Hastings Co., Ontario, Kanada. Ex Van den Broucke Sammlung (sh.: https://www.mindat.org/mesg-560223.html).
Copyright: Wikipedia-user: David Hospital; Contribution: oliverOliver
Location: Kanada/Ontario/Hastings Co./Centre Hastings Township/Madoc/Taylor Pit
Mineral: Launayite
Image: 1703710228
License: Creative Commons - Attribution-ShareAlike 4.0 International  (CC BY-SA) V.4.0
Launayit  E
Analysed with energy dispersive X-ray spectroscopy EDX

Kleine Launayit-Kristallgruppe (ohne Maßstab; REM-EDX analysiert) von der Typlokalität Taylor Pit, Madoc, Hastings Co., Ontario, Kanada. Ex Van den Broucke Sammlung (sh.: https://www.mindat.org/mes~...
Copyright: Wikipedia-user: David Hospital
Contribution: oliverOliver 2023-12-27
Locality: Taylor Pit / Madoc / Centre Hastings Township / Hastings Co. / Ontario / Kanada

Collectors Summary

Color bleigrau-metallisch
Streak color schwarz
Lustre Metallglanz
Hardness (Mohs) 4
Cleavages vollkommen {100}{001}
Solubility + HNO3
Crystal System monoklin, C2, Cm, C2/m

Chemism

Chemical formula

CuPb10(Sb,As)13S30

Chemical composition

Antimon, Arsen, Blei, Kupfer, Schwefel

Unit weight: 4528.2674815 u; Number of atoms in the formula: 54

Info

Empirical formula:

CuPb10(Sb0.75As0.25)13S30

Element

Symbol

Weight%

Atoms

Atoms%

Atom weight (u)

Sum weight (u)
Sulfur

S

21.24

30

55.56

32.0655000

961.9650000
Copper

Cu

1.40

1

1.85

63.5463000

63.5463000
Arsenic

As

5.38

3.25

6.02

74.9216020

243.4952065
Antimony

Sb

26.22

9.75

18.06

121.7601000

1,187.1609750
Lead

Pb

45.76

10

18.52

207.2100000

2,072.1000000

Analysis wt%

Pb : 48.50, Sb : 29.50, As : 1.50, S : 21.25 (Ref: Canadian Mineralogist 67)

Strunz 9th edition incl. updates

2.LB.30

2: Sulfide und Sulfosalze (Sulfide, Selenide, Telluride, Arsenide, Antimonide, Bismutide, Sulfoarsenide, Sulfoantimonide, Sulfobismuthide)
L: unklassifizierte Sulfosalze
B:
30:Madocit-Gruppe

Lapis Classification

II/E.20-020

II: SULFIDE UND SULFOSALZE (Sulfide, Selenide, Telluride, Arsenide, Antimonide, Bismutide)
E: Sulfosalze (S : As,Sb,Bi = x)
20: Blei-Sulfosalze mit Sb (x=3,0 - 1,9)

Classification by Hölzel

2.GC.330

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

Dana 8th edition

03.06.06.01

03: Sulfides - Sulfosalts
06: Sulfides - Sulfosalts where 2 < z/y < 2.49 - (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

bleigrau-metallisch

Streak color

schwarz

Diaphaneity (Transparency)

opak

Lustre

Metallglanz

Pleochroism

mäßig, weiß zu grau

Anisotropism

Stark

Reflectivity: (Lambda nm) ↓, ↑, Ø

(470) 42.6, 38.6, 40.60
(546) 43.8, 36.9, 40.35
(589) 42.7, 36.2, 39.45
(650) 40.9, 35.5, 38.20
Reflection chart Launayite

Reflectivity Ø

39.65

Crystallography

Crystal System

monoklin

Class (H-M)

2, m, 2/m

Space Group number

5, 8, 12

Space Group

C2, Cm, C2/m

Cell parameters a (Å)

42.6

Cell parameters b (Å)

8.04

Cell parameters c (Å)

32.3

Cell parameters a/b or c/a

5.299

Cell parameters c/b

4.017

Cell parameters α

90°

Cell parameters β

102.08

Cell parameters γ

90°

Z

8

Volume (ų)

10817.907

X-Ray Powder Diffraction

4.17(80),
3.97(30),
3.45(100),
3.40(60),
2.92(80),
2.836(50),
2.752(50),
2.010(70)
XRD chart Launayite

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

Physical Properties

Hardness (Mohs)

4

VHN (Hardness Vickers)

179 (50g)

Density (g/cm³)

5.83 (berechnet)

5.56 ( ρ calc. Mineralienatlas )

Cleavages

vollkommen {100}{001}

Instability

+ HNO3

(Co-)Type locality

(Co-)Type locality

Kanada/Ontario/Hastings Co./Centre Hastings Township/Madoc/Taylor Pit

Preface

Associations

Veenit, Boulangerit

Name from

Louis de Launay (1860-1938), französischer Geologe

Author (Name, Year)

Jambor, 1967

References

Canadian Mineralogist 9 (1967), 191

Jambor, J.L. - New lead sulfantimonides from Madoc, Ontario. Part 2 – mineral descriptions. Canadian Mineralogist 9 (1967), 191–194.

Other languages

German

Launayit

Spanish

Launayita

French

Launayite

English

Launayite

Russian

Лонэит

CNMNC (IMA)-Number

IMA 1966-021

CNMNC symbol

Symbol

Lau

Locations with GPS information

IDs

GUSID (Global unique identifier short form) 1r9qgE5JNUi3zgyfudC-gg
GUID (Global unique identifier) 806ABFD6-494E-4835-B7CE-0C9FB9D0BE82
Database ID 2148