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Parasterryite

Collectors Summary

Color schwarz-metallisch
Hardness (Mohs) 3-4
Cleavages schlecht parallel a
Fracture muschelig
Crystal System monoklin, P21/c

Chemism

Chemical formula

Ag4Pb20Sb14As10S58

Chemical composition

Antimon, Arsen, Blei, Silber, Schwefel

Unit weight: 8889.3293 u; Number of atoms in the formula: 106

Info

Empirical formula:

Ag4Pb20Sb14As10S58

Element

Symbol

Weight%

Atoms

Atoms%

Atom weight (u)

Sum weight (u)

Sulfur

S

20.92

58

54.72

32.0655000

1,859.7990000

Arsenic

As

8.43

10

9.43

74.9216020

749.2160200

Silver

Ag

4.85

4

3.77

107.8682200

431.4728800

Antimony

Sb

19.18

14

13.21

121.7601000

1,704.6414000

Lead

Pb

46.62

20

18.87

207.2100000

4,144.2000000

Analysis wt%

S : 20.90, As : 8.43, Sb : 19.18, Pb : 46.63, Ag : 4.86 (Ref: berechnet)

Strunz 9th edition incl. updates

2.HC.40

2: Sulfide und Sulfosalze (Sulfide, Selenide, Telluride, Arsenide, Antimonide, Bismutide, Sulfoarsenide, Sulfoantimonide, Sulfobismuthide)
H: Sulfosalze mit SnS als Vorbild
C: Nur mit [Blei] (Pb)
40:

Lapis Classification

II/E.20-035

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.315

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

IMA status

anerkannt CNMNC im Sept. 2010

Mineral status

anerkanntes Mineral

Optical Properties

Color

schwarz-metallisch

Pleochroism

grauweiß nach weiß

Bireflectance

schwach

Anisotropism

schwach

Crystallography

Crystal System

monoklin

Class (H-M)

2/m

Space Group number

14

Space Group

P21/c

Cell parameters a (Å)

8.397

Cell parameters b (Å)

27.954

Cell parameters c (Å)

43.884

Cell parameters a/b or c/a

0.300

Cell parameters c/b

1.570

Cell parameters α

90°

Cell parameters β

90.7

Cell parameters γ

90°

Z

4

Volume (ų)

10300.111

Crystal structure

Struktur ermittelt

X-Ray Powder Diffraction

3.62(100), 3.42(45), 3.35(95), 3.23(65), 3.01(45), 2.945(85), 2.885(80), 1.916(45)

XRD chart Parasterryite

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

Crystals 3D

Open larger view

Crystal Structure 3D

Open larger view

Physical Properties

Hardness (Mohs)

3-4

VHN (Hardness Vickers)

unsichere Daten: 196 (25 g); 238 (10 g)

Density (g/cm³)

5.747 (berechnet)

5.732 ( ρ calc. Mineralienatlas )

Cleavages

schlecht parallel a

Fracture

muschelig

(Co-)Type locality

(Co-)Type locality

Italien/Toskana (Toscana)/Lucca, Provinz/Apuanische Alpen/Pietrasanta/Valdicastello Carducci/Miniera del Pollone

Type material

Museo di Storia Naturale e del Territorio, Universita` di Pisa, Italy

Collection number of type material

19347

Preface

Name from

Ähnlichkeit zu Sterryit

Author (Name, Year)

Moëlo, Y., Orlandi, P., Guillot-Deudon, C., Biagioni, C., Paar, W.H. and Evain, M. (2010)

References

Parasterryite, IMA 2010-033. CNMNC Newsletter, October 2010, page 900; Mineralogical Magazine, 74, 899-902

Other languages

German

Parasterryit

English

Parasterryite

CNMNC (IMA)-Number

IMA 2010-033

CNMNC symbol

Symbol

Psty

Locations with GPS information

IDs

GUSID (Global unique identifier short form) sXHgUlnVCkmc3G-P1S6xQA
GUID (Global unique identifier) 52E071B1-D559-490A-9CDC-6F8FD52EB140
Database ID 6946