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Pirquitasite

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Pirquitasit
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Pirquitasit

Oploca Vein System, Pirquitas Ag-Sn Deposit, Rinconada Department, Jujuy, Argentina; Tetragonal crystal of pirquitasite in a quartz pyrite matrix. FOV 1mm. Acquired from David Hospital who got it f...

Collection: Brent Thorne
Copyright: Brent Thorne
Contribution: Stefan 2018-07-13
Locality: Oploca Mine / Pirquitas Ag-Sn-Lagerstätte / Rinconada Department / Jujuy, Provinz / Argentinien

Collectors Summary

Color bräunlich grau, mit roten internen Reflektionen
Streak color bräunlich grau
Hardness (Mohs) 4.25
Crystal System tetragonal, I42m, I4

Chemism

Chem­ical formula

Ag2ZnSnS4

Chem­ical com­po­si­tion

Silber, Zink, Zinn, Schwefel

Unit weight: 528.11854 u; Number of atoms in the formula: 8

Info

Empirical formula:

Ag2ZnSnS4

Element

Symbol

Weight%

Atoms

Atoms%

Atom weight (u)

Sum weight (u)

Sulfur

S

24.29

4

50.00

32.0655000

128.2620000

Zinc

Zn

12.39

1

12.50

65.4094000

65.4094000

Silver

Ag

40.85

2

25.00

107.8682200

215.7364400

Tin

Sn

22.48

1

12.50

118.7107000

118.7107000

Anal­y­sis wt%

Ag : 39.72, Zn : 11.40, Fe : 1.31, Sn : 23.12, S : 24.42 (Ref: Bulletin de Mineralogie 82)

Strunz 9th edi­tion incl. updates

2.CB.15

2: Sulfide und Sulfosalze (Sulfide, Selenide, Telluride, Arsenide, Antimonide, Bismutide, Sulfarsenite, Sulfantimonite, Sulfbismuthite)
C: Metallsulfide, M : S = 1 : 1 (und ähnliche)
B: mit Zink (Zn), Eisen (Fe), Kupfer (Cu), Silber (Ag), usw.
15:Stannit-Gruppe

Lapis Clas­sifica­tion

II/C.06-120

II: SULFIDE UND SULFOSALZE (Sulfide, Selenide, Telluride, Arsenide, Antimonide, Bismutide)
C: Sulfide mit Metall : S,Se,Te ~ 1:1
6: Stannit-Gruppe

Clas­sifica­tion by Hölzel

2.CB.360

2: SULFIDES
C: Sulfides (etc) with Me/S=1/1
B: With Zn,Cu (etc), Coordination Number ~[4] Framework of Cornersharing Tetrahedra: Sphalerite-Germanite-Family
3: Stannite-Group

Dana 8th edi­tion

02.09.02.07

02: Sulfide Minerals
09: Sulfides - Including Selenides and Tellurides where Am Bn Xp, with (m+n):p=1:1
02: Stannite Group (Tetragonal: I-42m) A2BCS type

IMA sta­tus

Anerkannt von der CNMNC

Min­eral sta­tus

anerkanntes Mineral

IMA Classification

IMA Clas­sifica­tion

Stannite group

Optical Properties

Color

bräunlich grau, mit roten internen Reflektionen

Streak color

bräunlich grau

Diaphane­ity (Trans­parency)

opak

Crystallography

Crystal Sys­tem

tetragonal

Class (H-M)

42m, 4

Space Group number

121, 82

Space Group

I42m, I4

Cell param­e­ters a (Å)

5.786

Cell param­e­ters b (Å)

-

Cell param­e­ters c (Å)

10.829

Cell param­e­ters a/b or c/a

1.872

Cell param­e­ters c/b

-

Cell param­e­ters α

90°

Cell param­e­ters β

90°

Cell param­e­ters γ

90°

Z

2

Volumne (ų)

362.531

X-Ray Pow­der Diffrac­tion

3.267(100),
2.901(40),
2.717(30),
2.049(60),
1.976(80),
1.735(80),
1.289(40),
1.165(40)

XRD chart Pirquitasite

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

Crystal Structure 3D

Open larger view

Physical Properties

Hard­ness (Mohs)

4.25

VHN (Hard­ness Vick­ers)

218 (25g)

Density (g/cm³)

4.822

4.838 ( ρ calc. Mineralienatlas )

Preface

Author (Name, Year)

Johan & Picot, 1982

References

American Mineralogist (1983): 68: 1249.

Bulletin de la Société française de Minéralogie et de Cristallographie (1982): 105: 229.

Strunz Mineralogical Tables 9. Edition

IMA group assignments

Other languages

German

Pirquitasit

Spanish

Pirquitasita

French

Pirquitasite

English

Pirquitasite

Russian

Пиркитасит

Alternative Name

Simplified Chinese

硫锡锌银矿

CNMNC (IMA)-Number

IMA 1980-091

CNMNC symbol

Symbol

Pi

Automatic Links to external internet sources (Responsibility is with the operator)

German pages

DeWikiPedia - search for: Pirquitasit
Google-Bilder-Suche - search for: Pirquitasit
Mineralienatlas.de (Forum) - search for: Pirquitasit

English pages

Mindat - search for: Pirquitasite
Webmineral - search for:Pirquitasite
Handbook-of-Mineralogy - search for: Pirquitasite
RRUFF - Raman, XRD and other mineral data - search for: Pirquitasite
RRUFF - References and PDF downloads - search for: Pirquitasite
American-Mineralogist-Crystal-Structure-Database - search for: Pirquitasite
Strahlen.org - search for: Pirquitasite

Russian pages

Webmineral.ru - search for: Пиркитасит

Mineral Dealer

German pages

hausen - Mineralgroßhandel - search for: Pirquitasit
Crystal-Treasure.com - search for: Pirquitasit
Bosse - search for: Pirquitasit
Edelsteine Neuburg - Gundolf Fischer - search for: Pirquitasit

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