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Petewilliamsite

Collectors Summary

Color braunrot
Hardness (Mohs) 5~
Cleavages keine
Fracture uneben
Crystal System monoklin, C2

Chemism

Chemical formula

(Ni,Co,Cu)30(As2O7)15

Chemical composition

Arsen, Kobalt, Kupfer, Nickel, Sauerstoff

Unit weight: 5705.1074781 u; Number of atoms in the formula: 165

Info

Empirical formula:

(Ni0.6Co0.3Cu0.1)30(As2O7)15

Element

Symbol

Weight%

Atoms

Atoms%

Atom weight (u)

Sum weight (u)
Oxygen

O

29.45

105

63.64

15.9994300

1,679.9401500
Cobalt

Co

9.30

9

5.45

58.9332009

530.3988081
Nickel

Ni

18.52

18

10.91

58.6934200

1,056.4815600
Copper

Cu

3.34

3

1.82

63.5463000

190.6389000
Arsenic

As

39.40

30

18.18

74.9216020

2,247.6480600

Analysis wt%

As2O5 : 60.32, NiO : 19.45, CoO : 19.39, CuO : 3.40 (Ref: Mineralogical Magazine 2004)

Strunz 9th edition incl. updates

8.FA.25

8: Phosphate, Arsenate, Vanadate
F: Polyphosphate, Polyarsenate, ~[4]-Polyvanadate
A: Diphosphate, etc., ohne OH und H2O; Dimers von eckenteilenden RO4 Tetraedern
25:Petewilliamsit-Gruppe

Lapis Classification

VII/A.20-005

VII: PHOSPHATE, ARSENATE UND VANADATE ("Phosphate" des Registers immer einschließlich isotyper Arsenate und Vanadate!)
A: Wasserfreie Phosphate [PO4] 3-, ohne fremde Anionen
20: Wasserfreie Diarsenate und Divanadate [As2O7] / [V2O7] 4-

Classification by Hölzel

8.AT.100

8: PHOSPHATES ARSENATES VANADATES
A: Phosphates (-anions -water)
T: Diphosphates

Dana 8th edition

38.04.13.01

38: Anhydrous Phosphates, etc
04: Anhydrous Phosphates, etc A+ XO4

IMA status

Anerkannt von der CNMNC

Mineral status

anerkanntes Mineral

Optical Properties

Color

braunrot

RI value α / ω / n

1.88

Ri mean

1.880

Crystallography

Crystal System

monoklin

Class (H-M)

2

Space Group number

5

Space Group

C2

Cell parameters a (Å)

33.356

Cell parameters b (Å)

8.482

Cell parameters c (Å)

14.191

Cell parameters a/b or c/a

3.933

Cell parameters c/b

1.673

Cell parameters α

90°

Cell parameters β

104.15

Cell parameters γ

90°

Z

2

Volume (ų)

3893.178

X-Ray Powder Diffraction

4.23(30),
3.118(100),
3.005(60),
2.567(50),
2.452(20),
2.258(20),
1.637(50),
1.507(30)
XRD chart Petewilliamsite

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

Crystal Structure 3D

Open larger view

Physical Properties

Hardness (Mohs)

5~

VHN (Hardness Vickers)

390 (ungefähre Angabe abgeleitet aus der Mohshärte)

Density (g/cm³)

4.904 (berechnet)

4.866 ( ρ calc. Mineralienatlas )

Cleavages

keine

Fracture

uneben

Tenacity

spröde

(Co-)Type locality

(Co-)Type locality

Deutschland/Sachsen/Erzgebirgskreis/Johanngeorgenstadt

Preface

Author (Name, Year)

Roberts & Burns & Gault & criddle & Feinglos, 2004

References

Mineralogical Magazine 68 (2004), 231

Other languages

German

Petewilliamsit

Spanish

Petewilliamsita

French

Petewilliamsite

English

Petewilliamsite

Simplified Chinese

皮特威廉姆斯矿

Traditional Chinese

皮特威廉姆斯礦

CNMNC (IMA)-Number

IMA 2002-059

CNMNC symbol

Symbol

Pwi

Locations with GPS information

IDs

GUSID (Global unique identifier short form) Kl2IwlE6Xk-RTWgWeGveGg
GUID (Global unique identifier) C2885D2A-3A51-4F5E-914D-6816786BDE1A
Database ID 3012