Buckhornite Mineral Data + Say BUCKHORNITE

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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 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),
 

Physical Properties of Buckhornite

Help on Cleavage: Cleavage: [???] Perfect
Help on Color: Color: Black.
Help on Diaphaniety: Diaphaniety: 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:

relectron=6.73 gm/cc
note: rBuckhornite =8.25 gm/cc.

Help on Fermion Index Fermion Index Fermion Index = 0.09617
Boson Index = 0.90383
Help on Photoelectric: Photoelectric:

PEBuckhornite =1,379.89 barns/electron
U=PEBuckhornite x relectron=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: 2.11.11.1 (2)Sulfides - Including Selenides and Tellurides
  (2.11)where Am Bn Xp, with (m+n):p=2:3
  (2.11.11)Dana Group
 
2.11.11.1 Buckhornite AuPb2BiTe2S3 P mmm 2/m 2/m 2/m
Help on  Strunz Class: Strunz Class: II/D.15-30 II - Sulfides and sulphosalts
  II/D - Sulfides with metal: sulfur, selenium and tellurium < 1:1, Tellurides with Copper, Silver, Gold
  II/D.15 - Montbrayite - Buckhornite series
 
II/D.15-10 Montbrayite (Au,Sb)2Te3 P1 1
 
II/D.15-20 Nagyagite AuPb(Sb,Bi)Te2-3S6 P 4 4
 
II/D.15-30 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 -Google Images 5 -Google Scholar 6 -Handbook of Mineralogy (UofA) 7 -MinDAT 8 -MinMax(Deutsch) 9 -MinMax(English) 10 -Mineralienatlas (Deutsch) 11 -QUT Mineral Atlas 12 - WWW-MINCRYST 13 -École des Mines de Paris

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

Buckhornite

AuPb2BiTe2S3
Dana No: 2.11.11.1 Strunz No: II/D.15-30
Locality:

 

Notes:

 

 
   
 
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