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Buckhornite

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Buckhornit
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Buckhornit

dünntafelige Aggregate von Buckhornit, Buckhorn Mine, Jamestown, Boulder Co., Colorado, USA; BB 1 mm, analysiert

Copyright: mintreasure.com
Contribution: openpit 2022-04-07
Locality: Buckhorn Mine / Jamestown / Jamestown District / Boulder Co. / Colorado / USA

Collectors Summary

Color schwarz-met.
Streak color grau
Hardness (Mohs) 2.00 - 2.50
Cleavages vollkommen {100}
Crystal System orthorhombisch, Pmmn

Chemism

Chem­ical formula

(Pb2BiS3)(AuTe2)

Chem­ical com­po­si­tion

Bismut, Blei, Gold, Tellur, Schwefel

Unit weight: 1171.769434 u; Number of atoms in the formula: 9

Info

Empirical formula:

(Pb2BiS3)(AuTe2)

Element

Symbol

Weight%

Atoms

Atoms%

Atom weight (u)

Sum weight (u)

Sulfur

S

8.21

3

33.33

32.0655000

96.1965000

Tellurium

Te

21.78

2

22.22

127.6030000

255.2060000

Gold

Au

16.81

1

11.11

196.9665520

196.9665520

Lead

Pb

35.37

2

22.22

207.2100000

414.4200000

Bismuth

Bi

17.83

1

11.11

208.9803820

208.9803820

Anal­y­sis wt%

Ø Au : 16.50, Pb : 38.40, Bi : 17.70, Te : 21.50, S : 8.40 (Ref: Canadian Mineralogist 92)

Strunz 9th edi­tion incl. updates

2.HB.20

2: Sulfide und Sulfosalze (Sulfide, Selenide, Telluride, Arsenide, Antimonide, Bismutide, Sulfarsenite, Sulfantimonite, Sulfbismuthite)
H: Sulfosalze mit SnS als Vorbild
B: Mit Cu, Ag, Fe, Sn und Pb
20:Nagyágit-Gruppe

Lapis Clas­sifica­tion

II/D.15-030

II: SULFIDE UND SULFOSALZE (Sulfide, Selenide, Telluride, Arsenide, Antimonide, Bismutide)
D: Sulfide mit Metall : S,Se,Te < 1:1
15: Telluride mit Kupfer, Silber, Gold

Clas­sifica­tion by Hölzel

2.EA.260

2: SULFIDES
E: Me/S=1/2 (also < 1/2)
A: Me/S=1/2 with Cu,Ag,Au, etc.
2: Unclassified

Dana 8th edi­tion

02.11.11.01

02: Sulfide Minerals
11: Sulfides - Including Selenides and Tellurides where Am Bn Xp, with (m+n):p=2:3

IMA sta­tus

Anerkannt von der CNMNC

Min­eral sta­tus

anerkanntes Mineral

Optical Properties

Color

schwarz-met.

Streak color

grau

Crystallography

Crystal Sys­tem

orthorhombisch

Class (H-M)

mmm

Space Group number

59

Space Group

Pmmn

Cell param­e­ters a (Å)

4.092

Cell param­e­ters b (Å)

12.245

Cell param­e­ters c (Å)

9.322

Cell param­e­ters a/b or c/a

0.334

Cell param­e­ters c/b

0.761

Cell param­e­ters α

90°

Cell param­e­ters β

90°

Cell param­e­ters γ

90°

Z

2

Volumne (ų)

467.093

X-Ray Pow­der Diffrac­tion

3.739(90),
3.108(90),
2.763(100),
2.456(90),
2.390(100),
2.044(80),
1.816(70),
1.708(80)

XRD chart Buckhornite

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)

2.00 - 2.50

VHN (Hard­ness Vick­ers)

54 (10g)

Density (g/cm³)

8.11 (berechnet)

8.331 ( ρ calc. Mineralienatlas )

Cleav­ages

vollkommen {100}

Tenac­ity

schneidbar und flexibel

Preface

Author (Name, Year)

Francis & Criddle & Stanley & Lange & Shieh & Francis, 1992

References

Canadian Mineralogist 30 (1992), 1039

Other languages

German

Buckhornit

Spanish

Buckhornita

English

Buckhornite

French

Buckhornite

Russian

Бакхорнит

Russian

Букхорнит

Simplified Chinese

硫碲铋铅金矿

Japanese

バックフォーナイト

CNMNC (IMA)-Number

IMA 1988-022

CNMNC symbol

Symbol

Bhr

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

German pages

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

English pages

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

Russian pages

Webmineral.ru - search for: Букхорнит

Mineral Dealer

German pages

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

Locations with GPS information