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![Mineralogy Database Mineralogy Database](/images/Hedyphane_Crystal.gif) |
Benavidesite Mineral Data
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General Benavidesite Information
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Chemical Formula: |
Pb4(Mn,Fe)Sb6S14 |
Composition: |
Molecular Weight = 2,063.39 gm |
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Manganese 2.00 % Mn |
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Iron 0.68 % Fe |
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Antimony 35.40 % Sb |
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Lead 40.17 % Pb |
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Sulfur 21.76 % S |
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______ |
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100.00 % |
Empirical Formula: |
Pb4Mn2+0.75Fe2+0.25Sb6S14 |
Environment: |
Metamorphosed iron sulfide deposit associated with submarine felsic volcanism. |
IMA Status: |
Approved IMA 1982 |
Locality: |
Satra mine, Dovertorp, Bergslagen, Sweden. Link to MinDat.org Location Data. |
Name Origin: |
Named for A. Benavides to honor his contributions in the development of mining in Peru. |
Name Pronunciation: |
Benavidesite + Pronunciation |
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Benavidesite Image |
Images:
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Benavidesite
Comments: Gray tabular benavidesite crystals associated with quartz.
Location: Bear Basin Mines, Bear Basin, North Bend, King County, Washington, USA.
Scale: See Image.
© Rruff Database |
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Benavidesite Crystallography
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Axial Ratios: |
a:b:c =0.8223:1:0.2121 |
Cell Dimensions: |
a = 15.74, b = 19.14, c = 4.06, Z = 2; beta = 91.5° V = 1,222.71 Den(Calc)= 5.60 |
Crystal System: |
Monoclinic - Prismatic H-M Symbol (2/m) Space Group: P 21/a |
X Ray Diffraction: |
By Intensity(I/Io): 3.45(1), 2.829(0.4), 4.1(0.3), |
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Physical Properties of Benavidesite
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Cleavage: |
None |
Color: |
Lead gray, Gray. |
Density: |
5.6 |
Diaphaneity: |
Opaque |
Habit: |
Acicular - Occurs as needle-like crystals. |
Hardness: |
2.5 - Finger Nail |
Luster: |
Metallic |
Streak: |
brown gray |
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Optical Properties of Benavidesite
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RL Anisotrophism: |
Strong with tints of brown and blue. |
RL Color: |
White with a greenish tint with rare dull red internal reflections.. |
RL Pleochroism: |
Weak. |
Reflectivity |
Standardized Intensity (100%) Reflection Spectra of Benavidesite in Air
λ |
R1 |
R2 |
![](../images/Reflect_scale_v.gif) |
∑ R1(λ) |
∑ R2(λ) |
400 nm |
42.00 |
40.70 |
![](../images/400nm.BMP)
![](../images/400nm.BMP) |
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420 nm |
42.00 |
39.60 |
![](../images/420nm.BMP)
![](../images/420nm.BMP) |
440 nm |
42.00 |
39.30 |
![](../images/440nm.BMP)
![](../images/440nm.BMP) |
460 nm |
42.40 |
39.50 |
![](../images/460nm.BMP)
![](../images/460nm.BMP) |
480 nm |
43.00 |
39.90 |
![](../images/480nm.BMP)
![](../images/480nm.BMP) |
500 nm |
42.90 |
39.70 |
![](../images/500nm.BMP)
![](../images/500nm.BMP) |
520 nm |
42.70 |
39.50 |
![](../images/520nm.BMP)
![](../images/520nm.BMP) |
540 nm |
42.40 |
39.00 |
![](../images/540nm.BMP)
![](../images/540nm.BMP) |
560 nm |
42.20 |
38.90 |
![](../images/560nm.BMP)
![](../images/560nm.BMP) |
580 nm |
41.80 |
38.70 |
![](../images/580nm.BMP)
![](../images/580nm.BMP) |
600 nm |
41.30 |
38.30 |
![](../images/600nm.BMP)
![](../images/600nm.BMP) |
620 nm |
40.80 |
37.90 |
![](../images/620nm.BMP)
![](../images/620nm.BMP) |
640 nm |
40.90 |
37.50 |
![](../images/640nm.BMP)
![](../images/640nm.BMP) |
660 nm |
39.50 |
36.80 |
![](../images/660nm.BMP)
![](../images/660nm.BMP) |
680 nm |
38.70 |
36.10 |
![](../images/680nm.BMP)
![](../images/680nm.BMP) |
700 nm |
37.80 |
35.60 |
![](../images/700nm.BMP)
![](../images/700nm.BMP) |
Calculated Relative Intensity Colors of Benavidesite in Air
Relative Intensity |
0% |
30% |
60% |
90% |
100% |
120% |
150% |
180% |
210% |
240% |
R1 |
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R2 |
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Calculated Properties of Benavidesite
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Electron Density: |
Bulk Density (Electron Density)=4.79 gm/cc note: Specific Gravity of Benavidesite =5.60 gm/cc. |
Fermion Index: |
Fermion Index = 0.09 Boson Index = 0.91 |
Photoelectric: |
PEBenavidesite = 843.95 barns/electron U=PEBenavidesite x rElectron Density=4,046.12 barns/cc. |
Radioactivity: |
GRapi = 0 (Gamma Ray American Petroleum Institute Units) Benavidesite is Not Radioactive |
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Benavidesite Classification
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Dana Class: |
03.06.07.02 (03)Sulfides - Sulfosalts |
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(03.06)where 2 < z/y < 2.49 - (A+)i (A++)j [By Cz], A=metals, B=semi-metals, C=non-metals |
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(03.06.07)Dana Group |
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03.06.07.01 Jamesonite Pb4FeSb6S14 P 21/a 2/m |
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03.06.07.02 Benavidesite Pb4(Mn,Fe)Sb6S14 P 21/a 2/m |
Strunz Class: |
02.HB.15 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.15 Benavidesite Pb4(Mn,Fe)Sb6S14 P 21/a 2/m |
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02.HB.15 Jamesonite Pb4FeSb6S14 P 21/a 2/m |
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Other Benavidesite Information
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References: |
NAME( AntBidBlaNic1) PHYS. PROP.(Enc. of Minerals,2nd ed.,1990) OPTIC PROP.(AntBidBlaNic1) |
See Also: |
Links to other databases for Benavidesite :
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 Benavidesite Specimen Label here :
Benavidesite
Pb4(Mn,Fe)Sb6S14
Dana No: 03.06.07.02 Strunz No: 02.HB.15
Locality:
Notes:
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