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Menchettiite

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Menchettiit
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Menchettiit
graumetallische Probe von Menchettiit auf Schaumstoff, Uchucchacua Mine, Oyon, Peru; BB ~ 1 mm, analysiert mittels REM-EDX, Teil des Holotyp-Materials
Copyright: MinTreasure.com (Carsten Slotta); Contribution: openpit
Location: Peru/Lima, Region/Oyon, Provinz/Uchucchacua Mine
Mineral: Menchettiite
Image: 1605112984
License: Usage for Mineralienatlas project only
Menchettiit  E
Analysed with energy dispersive X-ray spectroscopy EDX

graumetallische Probe von Menchettiit auf Schaumstoff, Uchucchacua Mine, Oyon, Peru; BB 1 mm, analysiert mittels REM-EDX, Teil des Holotyp-Materials

Copyright: MinTreasure.com (Carsten Slotta)
Contribution: openpit 2020-11-11
Locality: Uchucchacua Mine / Oyon, Provinz / Lima, Region / Peru

Collectors Summary

Fracture uneben
Crystal System monoklin, P21/n

Chemism

Chemical formula

Pb5Mn3Ag2Sb6As4S24

Additional chem. information

Mitglied der Ramdohrit-Lillianit-Serie

Chemical composition

Antimon, Arsen, Blei, Mangan, Silber, Schwefel

Unit weight: 3216.4195977 u; Number of atoms in the formula: 44

Info

Empirical formula:

Pb5Mn3Ag2Sb6As4S24

Element

Symbol

Weight%

Atoms

Atoms%

Atom weight (u)

Sum weight (u)

Sulfur

S

23.93

24

54.55

32.0655000

769.5720000

Manganese

Mn

5.12

3

6.82

54.9380499

164.8141497

Arsenic

As

9.32

4

9.09

74.9216020

299.6864080

Silver

Ag

6.71

2

4.55

107.8682200

215.7364400

Antimony

Sb

22.71

6

13.64

121.7601000

730.5606000

Lead

Pb

32.21

5

11.36

207.2100000

1,036.0500000

Analysis wt%

S : 24.03, As : 9.25, Sb : 23.23, Ag : 6.59, Pb : 31.23, Mn : 5.51 (Ref: berechnet)

Strunz 9th edition incl. updates

2.JA.40a

2: Sulfide und Sulfosalze (Sulfide, Selenide, Telluride, Arsenide, Antimonide, Bismutide, Sulfoarsenide, Sulfoantimonide, Sulfobismuthide)
J: Sulfosalze mit PbS als Vorbild
A: Ketten als Flächen verbunden
40a:

Lapis Classification

II/E.23-025

II: SULFIDE UND SULFOSALZE (Sulfide, Selenide, Telluride, Arsenide, Antimonide, Bismutide)
E: Sulfosalze (S : As,Sb,Bi = x)
23: Komplexe Blei-Sulfosalze (Pb-Fe/Mn, Pb-Ag) mit Sb (x=2,3 - 2,0)

Classification by Hölzel

2.HA.510

2: SULFIDES
H: PbS Archetype
A: With Cu,Ag,Pb
5: Ramdohrite Series

IMA status

anerkannt - CNMNC - New minerals and nomenclature modifications approved in May 2011

Mineral status

anerkanntes Mineral

Crystallography

Crystal System

monoklin

Class (H-M)

2/m

Space Group number

14

Space Group

P21/n

Cell parameters a (Å)

19.233

Cell parameters b (Å)

12.633

Cell parameters c (Å)

8.476

Cell parameters a/b or c/a

1.522

Cell parameters c/b

0.671

Cell parameters α

90°

Cell parameters β

90.8

Cell parameters γ

90°

Z

2

Volume (ų)

2059.217

Crystal structure

Struktur bestimmt

X-Ray Powder Diffraction

3.407(39), 3.403(39), 3.285(100), 2.859(26), 2.854(49), 2.852(47), 2.707(24), 2.119(33)

XRD chart Menchettiite

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

Crystal Structure 3D

Open larger view

Physical Properties

VHN (Hardness Vickers)

128 (100g)

Density (g/cm³)

5.187 ( ρ calc. Mineralienatlas )

Fracture

uneben

Tenacity

spröde

(Co-)Type locality

(Co-)Type locality

Peru/Lima, Region/Oyon, Provinz/Uchucchacua Mine

Type material

Museo di Storia Naturale, Sezione di Mineralogia e Litologia, Università di Firenze, Florenz, Italien

Collection number of type material

3109/I

Preface

Author (Name, Year)

Luca Bindi, Paola Bonazzi and Frank N. Keutsch (2011)

References

New minerals and nomenclature modifications approved in 2011 Williams et al. Mineral Mag.2011; 75: 2549-2561

Other languages

German

Menchettiit

English

Menchettiite

CNMNC (IMA)-Number

IMA 2011-009

CNMNC symbol

Symbol

Men

Locations with GPS information

IDs

GUSID (Global unique identifier short form) _5vuzxae8E-0RRhg_x-t0Q
GUID (Global unique identifier) CFEE9BFF-9E16-4FF0-B445-1860FF1FADD1
Database ID 7062