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Buckhornite Mineral Data
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General Buckhornite Information
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 Chemical Formula: |
AuPb2BiTe2S3 |
| Composition: |
Molecular Weight = 1,171.74 gm |
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Bismuth 17.83 % Bi |
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Tellurium 21.78 % Te |
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Lead 35.37 % Pb |
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Gold 16.81 % Au |
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Sulfur 8.21 % S |
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______ |
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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. |
| Name Pronunciation: |
Buckhornite + Pronunciation  |
| Synonym: |
IMA1988-022 |
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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 - Dipyramidal H-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), |
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Physical Properties of Buckhornite
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| Cleavage: |
{???} Perfect |
| Color: |
Black. |
| Diaphaneity: |
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 |
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Calculated Properties of Buckhornite
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| Electron Density: |
Bulk Density (Electron Density)=6.73 gm/cc
note: Specific Gravity of Buckhornite =8.25 gm/cc.
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| Fermion Index: |
Fermion Index = 0.09
Boson Index = 0.91 |
| Photoelectric: |
PEBuckhornite =1,379.89 barns/electron
U=PEBuckhornite x rElectron Density=9,288.00 barns/cc.
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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: |
02.11.11.01 (02)Sulfides - Including Selenides and Tellurides |
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(02.11)where Am Bn Xp, with (m+n):p=2:3 |
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(02.11.11)Dana Group |
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02.11.11.01 Buckhornite AuPb2BiTe2S3 P mmm 2/m 2/m 2/m |
| Strunz Class: |
02.HB.20b 02 - SULFIDES and SULFOSALTS (sulfides, selenides, tellurides; arsenides, antimonides, bismuthides; sulfarsenites, sulf |
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02.H - Sulfosalts of SnS Archetype |
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02.HB -With Cu, Ag, Hg, Fe, Sn and Pb |
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02.HB.20b Buckhornite AuPb2BiTe2S3 P mmm 2/m 2/m 2/m |
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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 - 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 :
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Buckhornite
AuPb2BiTe2S3
Dana No: 02.11.11.01 Strunz No: 02.HB.20b
Locality:
Notes:
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