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Aguilarite Mineral Data
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General Aguilarite Information
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 Chemical Formula: |
Ag4SeS |
| Composition: |
Molecular Weight = 542.50 gm |
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Silver 79.53 % Ag |
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Selenium 14.55 % Se |
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Sulfur 5.91 % S |
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______ |
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100.00 % |
| Empirical Formula: |
Ag4SeS |
| Environment: |
Low temperature silver mineral in deposits rich in selenium. |
| IMA Status: |
Valid Species (Pre-IMA) 1891 |
| Locality: |
Mexico, Guanajuato, San Carlos mine. Link to MinDat.org Location Data. |
| Name Origin: |
Named for Ponciano Aguilar (1853-1935), superintendent of the San Carlos mine, Guanajuato, where the mineral was found. |
| Name Pronunciation: |
Aguilarite + Pronunciation  |
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Aguilarite Image |
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Images:
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Aguilarite
Comments: Black, bladed, metallic aguilarite crystals in matrix.
Location: 4th of July mine, Custer Co., Idaho, USA.
Scale: Crystal length 3 mm.
© Tom Loomis / Dakota Matrix |
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Aguilarite Crystallography
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| Axial Ratios: |
a:b:c =0.6107:1:1.0944 |
| Cell Dimensions: |
a = 4.33, b = 7.09, c = 7.76, Z = 2; V = 238.23 Den(Calc)= 7.56 |
| Crystal System: |
Orthorhombic - Disphenoidal H-M Symbol (2 2 2) Space Group: P 212121 |
| X Ray Diffraction: |
By Intensity(I/Io): 2.43(1), 2.88(0.5), 1.48(0.4), |
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Physical Properties of Aguilarite
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| Cleavage: |
None |
| Color: |
Gray, Iron gray, Black. |
| Density: |
7.4 - 7.56, Average = 7.48 |
| Diaphaneity: |
Opaque |
| Fracture: |
Hackly - Jagged, torn surfaces, (e.g. fractured metals). |
| Habit: |
Massive - Uniformly indistinguishable crystals forming large masses. |
| Hardness: |
2-3 - Gypsum-Calcite |
| Luminescence: |
Non-fluorescent. |
| Luster: |
Adamantine - Metallic |
| Magnetism: |
Nonmagnetic |
| Streak: |
grayish black |
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Optical Properties of Aguilarite
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| RL Anisotrophism: |
Very weak. |
| Reflectivity |
Standardized Intensity (100%) Reflection Spectra of Aguilarite in Air
| λ |
R |
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∑ R(λ) |
| 400 nm |
33.30 |
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| 420 nm |
33.40 |
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| 440 nm |
33.50 |
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| 460 nm |
33.70 |
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| 480 nm |
33.80 |
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| 500 nm |
33.40 |
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| 520 nm |
32.80 |
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| 540 nm |
31.90 |
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| 560 nm |
31.00 |
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| 580 nm |
30.30 |
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| 600 nm |
29.80 |
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| 620 nm |
29.50 |
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| 640 nm |
29.30 |
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| 660 nm |
29.20 |
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| 680 nm |
29.20 |
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| 700 nm |
29.10 |
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Calculated Relative Intensity Colors of Aguilarite in Air
Relative
Intensity |
0% |
30% |
60% |
90% |
100% |
120% |
150% |
180% |
210% |
240% |
270% |
290% |
| R |
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Calculated Properties of Aguilarite
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| Electron Density: |
Bulk Density (Electron Density)=6.63 gm/cc
note: Specific Gravity of Aguilarite =7.56 gm/cc.
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| Fermion Index: |
Fermion Index = 0.01
Boson Index = 0.99 |
| Photoelectric: |
PEAguilarite = 218.58 barns/electron
U=PEAguilarite x rElectron Density=1,449.92 barns/cc.
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| Radioactivity: |
GRapi = 0 (Gamma Ray American Petroleum Institute Units)
Aguilarite is Not Radioactive |
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Aguilarite Classification
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| Dana Class: |
02.04.01.03 (02)Sulfides - Including Selenides and Tellurides |
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(02.04)where Am Bn Xp, with (m+n):p=2:1 |
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(02.04.01)Acanthite Group |
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02.04.01.01 Acanthite Ag2S P 21/n 2/m |
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02.04.01.02 Naumannite Ag2Se P 212121 2 2 2 |
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02.04.01.03 Aguilarite Ag4SeS P 212121 2 2 2 |
| Strunz Class: |
02.BA.30b 02 - SULFIDES and SULFOSALTS (sulfides, selenides, tellurides; arsenides, antimonides, bismuthides; sulfarsenites, sulf |
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02.B - Metal Sulfides, M:S > 1:1 (mainly 2:1) |
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02.BA -With Cu, Ag, Au |
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02.BA.30b Aguilarite Ag4SeS P 212121 2 2 2 |
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02.BA.30b Naumannite Ag2Se P 212121 2 2 2 |
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Other Aguilarite Information
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| References: |
NAME( Dana8) PHYS. PROP.(Dana8) OPTIC PROP.(AntBidBlaNic1) |
| See Also: |
Links to other databases for Aguilarite :
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 Aguilarite Specimen Label here :
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Aguilarite
Ag4SeS
Dana No: 02.04.01.03 Strunz No: 02.BA.30b
Locality:
Notes:
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