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Billingsleyite Mineral Data
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General Billingsleyite Information
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 Chemical Formula: |
Ag7AsS6 |
| Composition: |
Molecular Weight = 1,022.40 gm |
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Silver 73.85 % Ag |
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Arsenic 7.33 % As |
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Sulfur 18.82 % S |
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______ |
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100.00 % |
| Empirical Formula: |
Ag7AsS6 |
| Environment: |
Believed to have occurred in a body of high-grade silver ore. |
| IMA Status: |
Approved IMA 1968 |
| Locality: |
In the North Lily mine, East Tintic district, Juab Co., Utah, USA. Link to MinDat.org Location Data. |
| Name Origin: |
For Paul Billingsley (1887-1962), mining geologist, who discovered the North Lily mine, and collected the type material. |
| Name Pronunciation: |
Billingsleyite + Pronunciation  |
| Synonym: |
ICSD 75126 |
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PDF 45-1366 |
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Billingsleyite Image |
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Images:
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Billingsleyite
Comments: Gray-black billingsleyite crystals on matrix with famatinite, arsenopyrite.
Location: Grube Clara, Oberwolfach, Schwarzwald, Germany.
Scale: Picture size 1.0 x 0.6 cm.
© Diederik Visser |
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Billingsleyite Crystallography
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| Axial Ratios: |
a:b:c =0.9979:1:0.7044 |
| Cell Dimensions: |
a = 14.96, b = 14.99, c = 10.56, Z = 8; V = 2,368.08 Den(Calc)= 5.74 |
| Crystal System: |
Orthorhombic - Disphenoidal H-M Symbol (2 2 2) Space Group: C 2221 |
| X Ray Diffraction: |
By Intensity(I/Io): 3.03(1), 2.47(0.7), 2.8(0.7), |
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Physical Properties of Billingsleyite
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| Cleavage: |
{???} Indistinct |
| Color: |
Lead gray. |
| Density: |
5.9 - 5.94, Average = 5.92 |
| Diaphaneity: |
Opaque |
| Hardness: |
2.5 - Finger Nail |
| Luster: |
Metallic |
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Calculated Properties of Billingsleyite
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| Electron Density: |
Bulk Density (Electron Density)=5.14 gm/cc
note: Specific Gravity of Billingsleyite =5.74 gm/cc.
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| Fermion Index: |
Fermion Index = 0.0014113625
Boson Index = 0.9985886375 |
| Photoelectric: |
PEBillingsleyite = 194.26 barns/electron
U=PEBillingsleyite x rElectron Density= 999.03 barns/cc.
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| Radioactivity: |
GRapi = 0 (Gamma Ray American Petroleum Institute Units)
Billingsleyite is Not Radioactive |
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Billingsleyite Classification
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| Dana Class: |
03.01.06.01 (03)Sulfides - Sulfosalts |
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(03.01)where z/y > 4 - (A+)i (A++)j [By Cz], A=metals, B=semi-metals, C=non-metals |
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(03.01.06)Dana Group |
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03.01.06.01 Billingsleyite Ag7AsS6 C 2221 2 2 2 |
| Strunz Class: |
02.KB.05 02 - SULFIDES and SULFOSALTS (sulfides, selenides, tellurides; arsenides, antimonides, bismuthides; sulfarsenites, sulf |
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02.K - Sulfarsenates, Sulfantimonates |
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02.KB -Sulfarsenates with additional S |
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02.KB.05 Billingsleyite Ag7AsS6 C 2221 2 2 2 |
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Other Billingsleyite Information
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| References: |
NAME( AntBidBlaNic1) PHYS. PROP.(Enc. of Minerals,2nd ed.,1990) |
| See Also: |
Links to other databases for Billingsleyite :
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
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Print or Cut-and-Paste your Billingsleyite Specimen Label here :
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Billingsleyite
Ag7AsS6
Dana No: 03.01.06.01 Strunz No: 02.KB.05
Locality:
Notes:
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