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Penroseite (Penroseit)

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Penroseit
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Penroseit
Größe: 4,9 x 2,4 x 1,8 cm, Fundort: Mina Virgen de Surumi (Pacajake Mine), Potosi, Bolivien.
Copyright: Rob Lavinsky; Contribution: thdun5
Location: Bolivien/Potosi, Departamento/Chayanta, Provinz/Pakajake Canyon/Mina Virgen de Surumi (Pacajake Mine)
Mineral: Penroseite
Image: 1257946461
Rating: 7 (votes: 3)
License: Usage for Mineralienatlas project only
Penroseit

Größe: 4,9 x 2,4 x 1,8 cm, Fundort: Mina Virgen de Surumi (Pacajake Mine), Potosi, Bolivien.
Copyright: Rob Lavinsky
Contribution: thdun5 2009-11-11
Locality: Mina Virgen de Surumi (Pacajake Mine) / Pakajake Canyon / Chayanta, Provinz / Potosi, Departamento / Bolivien

Collectors Summary

Color cremig grauweiß
Streak color schwarz
Hardness (Mohs) 5.5
Solubility +++ HNO3
Crystal System kubisch, Pa3

Chemism

Chemical formula

(Ni,Co,Cu)Se2

Chemical composition

Kobalt, Kupfer, Nickel, Selen

Unit weight: 217.17664227 u; Number of atoms in the formula: 3

Info

Empirical formula:

(Ni0.6Co0.3Cu0.1)Se2

Element

Symbol

Weight%

Atoms

Atoms%

Atom weight (u)

Sum weight (u)
Cobalt

Co

8.14

0.3

10.00

58.9332009

17.6799603
Nickel

Ni

16.22

0.6

20.00

58.6934200

35.2160520
Copper

Cu

2.93

0.1

3.33

63.5463000

6.3546300
Selenium

Se

72.72

2

66.67

78.9630000

157.9260000

Analysis wt%

Pb : 10.88, Hg : 4.12, Ag : 5.00, Cu : 3.72, Fe : 0.72, Co : 0.71, Ni : 9.88, Se : 66.59, S : 0.52 (Ref: Dana, 7th ed. 1)

Strunz 9th edition incl. updates

2.EB.05

2: Sulfide und Sulfosalze (Sulfide, Selenide, Telluride, Arsenide, Antimonide, Bismutide, Sulfarsenite, Sulfantimonite, Sulfbismuthite)
E: Metallsulfide mit M:S >= 1:2
B: M:S = 1:2, mit Fe, Co, Ni, PGE, usw.
05:Pyrit-Gruppe

Lapis Classification

II/D.17-090

II: SULFIDE UND SULFOSALZE (Sulfide, Selenide, Telluride, Arsenide, Antimonide, Bismutide)
D: Sulfide mit Metall : S,Se,Te < 1:1
17: Pyrit-Gruppe

Classification by Hölzel

2.EB.170

2: SULFIDES
E: Me/S=1/2 (also < 1/2)
B: With Fe,Co,Ni,PGE Pyrite, Marcasite Family
1: Pyrite-Group

Dana 8th edition

02.12.01.04

02: Sulfide Minerals
12: Sulfides - Including Selenides and Tellurides where Am Bn Xp, with (m+n):p=1:2
01: Pyrite Group (Isometric: Pa3)

IMA status

Erstbeschreibung vor CNMNC-Gründung (1959), als Mineral meist anerkannt

Mineral status

anerkanntes Mineral

Optical Properties

Color

cremig grauweiß

Streak color

schwarz

Diaphaneity (Transparency)

opak

Crystallography

Crystal System

kubisch

Class (H-M)

m3

Space Group number

205

Space Group

Pa3

Cell parameters a (Å)

5.991

Cell parameters b (Å)

-

Cell parameters c (Å)

-

Cell parameters a/b or c/a

1

Cell parameters c/b

-

Cell parameters α

90°

Cell parameters β

90°

Cell parameters γ

90°

Z

4

Volumne (ų)

215.029

X-Ray Powder Diffraction

3.02(30),
2.67(100),
2.45(100),
1.806(90),
1.662(30),
1.599(40),
1.304(20),
1.151(30)
XRD chart Penroseite

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

Crystal Structure 3D

Open larger view

Physical Properties

Hardness (Mohs)

5.5

VHN (Hardness Vickers)

542 (100g)

Density (g/cm³)

6.58 - 6.74 / Durchschnittlich = 6.66

6.708 ( ρ calc. Mineralienatlas )

Instability

+++ HNO3

(Co-)Type locality

(Co-)Type locality

Bolivien/Potosi, Departamento/Chayanta, Provinz/Pakajake Canyon/Mina Virgen de Surumi (Pacajake Mine)

Preface

Author (Name, Year)

Gordon, 1926

References

Handbook of Mineralogy (Anthony et al.), 1 (1990), 395

Other languages

German

Penroseit

English

Penroseite

French

Penroseite

Spanish

Penroseíta

Russian

Пенрозеит

Russian

Пенроузит

Alternative Name

Blockit

Spanish

Blockita

English

Blockite

CNMNC symbol

Symbol

Pen

Locations with GPS information