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Petrovskaite

Collectors Summary

Color bleigrau, schwarz-met.
Streak color bräunlichgrau
Hardness (Mohs) 2.00 - 2.50
Solubility + HNO3, - HCl
Crystal System monoklin, P2, Pm, P2/m

Chemism

Chemical formula

AuAg(S,Se)

Chemical composition

Gold, Selen, Silber, Schwefel

Unit weight: 348.624647 u; Number of atoms in the formula: 3

Info

Empirical formula:

AuAg(S0.75Se0.25)

Element

Symbol

Weight%

Atoms

Atoms%

Atom weight (u)

Sum weight (u)
Sulfur

S

6.90

0.75

25.00

32.0655000

24.0491250
Selenium

Se

5.66

0.25

8.33

78.9630000

19.7407500
Silver

Ag

30.94

1

33.33

107.8682200

107.8682200
Gold

Au

56.50

1

33.33

196.9665520

196.9665520

Analysis wt%

Ø Au : 58.60, Ag : 31.00, S : 9.54, Se : 1.35 (Ref: Zapiski Vsesoyuznogo Mineralogicheskogo Obshchestva, 1904-1974 84)

Strunz 9th edition incl. updates

2.BA.75

2: Sulfide und Sulfosalze (Sulfide, Selenide, Telluride, Arsenide, Antimonide, Bismutide, Sulfarsenite, Sulfantimonite, Sulfbismuthite)
B: Metallsulfide, M : S > 1 : 1 (hauptsächlich 2 : 1)
A: mit Kupfer (Cu), Silber (Ag), Gold (Au)
75:Petzit-Gruppe

Lapis Classification

II/B.07-010

II: SULFIDE UND SULFOSALZE (Sulfide, Selenide, Telluride, Arsenide, Antimonide, Bismutide)
B: Sulfide, Selenide und Telluride mit Verhältnis Metall : S,Se,Te > 1:1
7: Sulfide, Selenide und Telluride mit vorwiegend Kupfer und Silber/Gold

Classification by Hölzel

2.BA.860

2: SULFIDES
B: Sulfides (etc) with Me/S > 1/1 (mostly 2/1)
A: With Cu,Ag,Au
8: Petzite-Bezsmallertnovite-Group

Dana 8th edition

02.04.17.01

02: Sulfide Minerals
04: Sulfides - Including Selenides and Tellurides where Am Bn Xp, with (m+n):p=2:1

IMA status

Anerkannt von der CNMNC

Mineral status

anerkanntes Mineral

Optical Properties

Color

bleigrau, schwarz-met.

Streak color

bräunlichgrau

Crystallography

Crystal System

monoklin

Class (H-M)

2, m, 2/m

Space Group number

3, 6, 10

Space Group

P2, Pm, P2/m

Cell parameters a (Å)

4.943

Cell parameters b (Å)

6.670

Cell parameters c (Å)

7.221

Cell parameters a/b or c/a

0.741

Cell parameters c/b

1.083

Cell parameters α

90°

Cell parameters β

95.68

Cell parameters γ

90°

Z

4

Volumne (ų)

236.906

X-Ray Powder Diffraction

7.25(30),
3.87(30),
2.77(100),
2.63(50),
2.39(40),
2.254(40),
1.797(30),
1.471(40)
XRD chart Petrovskaite

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

Physical Properties

Hardness (Mohs)

2.00 - 2.50

VHN (Hardness Vickers)

44 (10g)

Density (g/cm³)

9.5 (berechnet)

9.774 ( ρ calc. Mineralienatlas )

Instability

+ HNO3, - HCl

(Co-)Type locality

(Co-)Type locality

Kasachstan/Pawlodar, Gebiet (Pawlodar oblysy; Pavlodar)/Maikain

Preface

Author (Name, Year)

Nesterenko & Kuznetsova & Pal'chik & Lavrent'ev, 1984

References

Zapiski Vsesoyuznogo Mineralogicheskogo Obshchestva 113 (1984), 602

Other languages

German

Petrovskait

French

Petrovskaite

English

Petrovskaite

Spanish

Petrovskaíta

Russian

Петровскаит

Simplified Chinese

硒硫银金矿

Japanese

ﾍﾟﾄﾛﾋﾞｽｸｱｲﾄ

CNMNC (IMA)-Number

IMA 1983-079

CNMNC symbol

Symbol

Pvk

Locations with GPS information

IDs

GUSID (Global unique identifier short form) 4MnhXTFhOE-8tuSodLzQDQ
GUID (Global unique identifier) 5DE1C9E0-6131-4F38-BCB6-E4A874BCD00D
Database ID 3015