Buckhornite Mineral Data + 
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- 2.11.11.1 Buckhornite AuPb2BiTe2S3 P mmm 2/m 2/m 2/m
- 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
General Buckhornite Information |
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 Chemical Formula: |
AuPb2BiTe2S3 | ||
| 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 % | |||
| Empirical Formula: |
AuPb2BiTe2S3 | ||
| IMA Status: |
Approved IMA 1992 | ||
| Locality: |
Buckhorn mine, near Jamestown, Boulder, Colorado, USA. Link to MinDat.org Location Data. | ||
| Name Origin: |
Named after the locality. | ||
| Synonym: |
IMA1988-022 | ||
Search for Buckhornite Images | |||
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Images:
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Buckhornite Crystallography |
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| Axial Ratios: |
a:b:c =0.3337:1:0.7581 | ||
| Cell Dimensions: |
a = 4.108, b = 12.308, c = 9.331, Z = 2; V = 471.79 Den(Calc)= 8.25 | ||
| Crystal System: |
Orthorhombic - DipyramidalH-M Symbol (2/m 2/m 2/m) Space Group: P mmm | ||
| X Ray Diffraction: |
By Intensity(I/Io): 2.39(1), 2.763(1), 3.739(0.8), | ||
Physical Properties of Buckhornite |
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| Cleavage: |
[???] Perfect | ||
| Color: |
Black. | ||
| Diaphaniety: |
Opaque | ||
| Fracture: |
Sectile - Curved shavings or scrapings produced by a knife blade, (e.g. graphite). | ||
| Habit: |
Bladed - Aggregates of thin lath-like crystals (e.g. kyanite). | ||
| Habit: |
Euhedral Crystals - Occurs as well-formed crystals showing good external form. | ||
| Hardness: |
2.5 - Finger Nail | ||
| Luster: |
Metallic | ||
| Streak: |
gray | ||
Calculated Properties of Buckhornite |
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| Electron Density: |
relectron=6.73 gm/cc |
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| Fermion Index |
Fermion Index = 0.09617 Boson Index = 0.90383 |
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| Photoelectric: |
PEBuckhornite =1,379.89 barns/electron |
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| Radioactivity: |
GRapi = 0 (Gamma Ray American Petroleum Institute Units) Buckhornite is Not Radioactive |
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Buckhornite Classification |
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| 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 | |||
| 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 | |||
Other Buckhornite Information |
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| References: |
NAME( Dana8) PHYS. PROP.(Dana8) | ||
| 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 Search for Buckhornite using: Visit our Advertisers for Buckhornite : Translate Buckhornite Mineral Data : Ask about Buckhornite here : Print or Cut-and-Paste your Buckhornite Specimen Label here :
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