Buckhornite Mineral Data

Buckhornite Mineral Data
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General Buckhornite Information

Help on Chemical Formula: Chemical Formula: AuPb2BiTe2S3
Help on Composition: Composition: Molecular Weight = 1,171.74 gm
   Bismuth    17.83 %  Bi
   Tellurium  21.78 %  Te
   Lead       35.37 %  Pb
   Gold       16.81 %  Au
   Sulfur      8.21 %  S
             ______ 
             100.00 % 
Help on Empirical Formula: Empirical Formula: AuPb2BiTe2S3
Help on IMA Status: IMA Status: Approved IMA 1992
Help on Locality: Locality: Buckhorn mine, near Jamestown, Boulder, Colorado, USA. Link to MinDat.org Location Data.
Help on Name Origin: Name Origin: Named after the locality.
Help on Name Pronunciation: Name Pronunciation: Buckhornite + Pronunciation Say BUCKHORNITE
Help on Synonym: Synonym: IMA1988-022
 

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Buckhornite Crystallography
Help on Axial Ratios: Axial Ratios: a:b:c =0.3337:1:0.7581
Help on Cell Dimensions: Cell Dimensions: a = 4.108, b = 12.308, c = 9.331, Z = 2; V = 471.79 Den(Calc)= 8.25
Help on Crystal System: Crystal System: Orthorhombic - DipyramidalH-M Symbol (2/m 2/m 2/m) Space Group: P mmm
Help on X Ray Diffraction: X Ray Diffraction: By Intensity(I/Io): 2.39(1), 2.763(1), 3.739(0.8),
Click Here for Large Buckhornite Structure Window Crystal Structure:

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Effenberger H , Culetto F J , Topa D , Paar W H , Zeitschrift fur Kristallographie , 215 (2000) p.10-16, The crystal structure of synthetic buckhornite, [Pb2BiS3][AuTe2], Locality: synthetic

 

Physical Properties of Buckhornite

Help on Cleavage: Cleavage: {???} Perfect
Help on Color: Color: Black.
Help on Diaphaneity: Diaphaneity: Opaque
Help on Fracture: Fracture: Sectile - Curved shavings or scrapings produced by a knife blade, (e.g. graphite).
Help on Habit: Habit: Bladed - Aggregates of thin lath-like crystals (e.g. kyanite).
Help on Habit: Habit: Euhedral Crystals - Occurs as well-formed crystals showing good external form.
Help on Hardness: Hardness: 2.5 - Finger Nail
Help on Luster: Luster: Metallic
Help on Streak: Streak: gray
 

Calculated Properties of Buckhornite

Help on Electron Density: Electron Density: Bulk Density (Electron Density)=6.73 gm/cc
note: Specific Gravity of Buckhornite =8.25 gm/cc.
Help on Fermion Index: Fermion Index: Fermion Index = 0.09
Boson Index = 0.91
Help on Photoelectric: Photoelectric: PEBuckhornite =1,379.89 barns/electron
U=PEBuckhornite x rElectron Density=9,288.00 barns/cc.
Help on Radioactivity: Radioactivity: GRapi = 0 (Gamma Ray American Petroleum Institute Units)
Buckhornite is Not Radioactive
 

Buckhornite Classification
Help on Dana Class: Dana Class: 02.11.11.01 (02)Sulfides - Including Selenides and Tellurides
  (02.11)where Am Bn Xp, with (m+n):p=2:3
  (02.11.11)Dana Group
 
02.11.11.01 Buckhornite AuPb2BiTe2S3 P mmm 2/m 2/m 2/m
Help on Strunz Class: Strunz Class: 02.HB.20b 02 - SULFIDES and SULFOSALTS (sulfides, selenides, tellurides; arsenides, antimonides, bismuthides; sulfarsenites, sulf
  02.H - Sulfosalts of SnS Archetype
  02.HB -With Cu, Ag, Hg, Fe, Sn and Pb
 
02.HB.20b Buckhornite AuPb2BiTe2S3 P mmm 2/m 2/m 2/m
 

Other Buckhornite Information
Help on References: References: NAME( Dana8) PHYS. PROP.(Dana8)
Help on See Also: See Also: Links to other databases for Buckhornite :
1 - Am. Min. Crystal Structure Database
2 - Athena
3 - EUROmin Project
4 - Ecole des Mines de Paris
5 - GeoScienceWorld
6 - Google Images
7 - Google Scholar
8 - Handbook of Mineralogy (MinSocAm)
9 - Handbook of Mineralogy (UofA)
10 - MinDAT
11 - Mineralienatlas (Deutsch)
12 - Online Mineral Museum
13 - QUT Mineral Atlas
14 - Ruff.Info
15 - WWW-MINCRYST

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Print or Cut-and-Paste your Buckhornite Specimen Label here :

Buckhornite

AuPb2BiTe2S3
Dana No: 02.11.11.01 Strunz No: 02.HB.20b
Locality:

 

Notes: