Mineralogy Database

Benavidesite Mineral Data

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General Benavidesite Information

Help on Chemical  Formula: Chemical Formula: Pb4(Mn,Fe)Sb6S14
Help on Composition: Composition: Molecular Weight = 2,063.39 gm
   Manganese   2.00 %  Mn
   Iron        0.68 %  Fe
   Antimony   35.40 %  Sb
   Lead       40.17 %  Pb
   Sulfur     21.76 %  S
             100.00 % 
Help on Empirical Formula: Empirical Formula: Pb4Mn2+0.75Fe2+0.25Sb6S14
Help on Environment: Environment: Metamorphosed iron sulfide deposit associated with submarine felsic volcanism.
Help on IMA Status: IMA Status: Approved IMA 1982
Help on Locality: Locality: Satra mine, Dovertorp, Bergslagen, Sweden. Link to MinDat.org Location Data.
Help on Name Origin: Name Origin: Named for A. Benavides to honor his contributions in the development of mining in Peru.
Help on Name Pronunciation: Name Pronunciation: Benavidesite + Pronunciation Say BENAVIDESITE

Benavidesite Image

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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

Benavidesite Crystallography

Help on Axial Ratios: Axial Ratios: a:b:c =0.8223:1:0.2121
Help on Cell Dimensions: Cell Dimensions: a = 15.74, b = 19.14, c = 4.06, Z = 2; beta = 91.5° V = 1,222.71 Den(Calc)= 5.60
Help on Crystal System: Crystal System: Monoclinic - Prismatic H-M Symbol (2/m) Space Group: P 21/a
Help on X Ray Diffraction: X Ray Diffraction: By Intensity(I/Io): 3.45(1), 2.829(0.4), 4.1(0.3),

Physical Properties of Benavidesite

Help on Cleavage: Cleavage: None
Help on Color: Color: Lead gray, Gray.
Help on Density: Density: 5.6
Help on Diaphaneity: Diaphaneity: Opaque
Help on Habit: Habit: Acicular - Occurs as needle-like crystals.
Help on Hardness: Hardness: 2.5 - Finger Nail
Help on Luster: Luster: Metallic
Help on Streak: Streak: brown gray

Optical Properties of Benavidesite

Help on RL Anisotrophism: RL Anisotrophism: Strong with tints of brown and blue.
Help on RL Color: RL Color: White with a greenish tint with rare dull red internal reflections..
Help on RL Pleochroism: RL Pleochroism: Weak.
Help on Reflectivity Reflectivity
Standardized Intensity (100%) Reflection Spectra of Benavidesite in Air
λ R1 R2  ∑ R1(λ)   ∑ R2(λ) 
 400 nm   42.00   40.70 
 420 nm   42.00   39.60 
 440 nm   42.00   39.30 
 460 nm   42.40   39.50 
 480 nm   43.00   39.90 
 500 nm   42.90   39.70 
 520 nm   42.70   39.50 
 540 nm   42.40   39.00 
 560 nm   42.20   38.90 
 580 nm   41.80   38.70 
 600 nm   41.30   38.30 
 620 nm   40.80   37.90 
 640 nm   40.90   37.50 
 660 nm   39.50   36.80 
 680 nm   38.70   36.10 
 700 nm   37.80   35.60 
Calculated Relative Intensity Colors of Benavidesite in Air
   0%   30%   60%   90% 100% 120% 150% 180% 210% 240%

Calculated Properties of Benavidesite

Help on Electron Density: Electron Density: Bulk Density (Electron Density)=4.79 gm/cc
note: Specific Gravity of Benavidesite =5.60 gm/cc.
Help on Fermion Index: Fermion Index: Fermion Index = 0.09
Boson Index = 0.91
Help on Photoelectric: Photoelectric: PEBenavidesite = 843.95 barns/electron
U=PEBenavidesite x rElectron Density=4,046.12 barns/cc.
Help on Radioactivity: Radioactivity: GRapi = 0 (Gamma Ray American Petroleum Institute Units)
Benavidesite is Not Radioactive

Benavidesite Classification

Help on  Dana Class: Dana Class: (03)Sulfides - Sulfosalts
  (03.06)where 2 < z/y < 2.49 - (A+)i (A++)j [By Cz], A=metals, B=semi-metals, C=non-metals
  (03.06.07)Dana Group Jamesonite Pb4FeSb6S14 P 21/a 2/m Benavidesite Pb4(Mn,Fe)Sb6S14 P 21/a 2/m
Help on  Strunz Class: Strunz Class: 02.HB.15 02 - SULFIDES and SULFOSALTS (sulfides, selenides, tellurides; arsenides, antimonides, bismuthides; sulfarsenites, sulf
  02.H - Sulfosalts of SnS Archetype
  02.HB -With Cu, Ag, Hg, Fe, Sn and Pb
02.HB.15 Benavidesite Pb4(Mn,Fe)Sb6S14 P 21/a 2/m
02.HB.15 Jamesonite Pb4FeSb6S14 P 21/a 2/m

Other Benavidesite Information

Help on References: References: NAME( AntBidBlaNic1) PHYS. PROP.(Enc. of Minerals,2nd ed.,1990) OPTIC PROP.(AntBidBlaNic1)
Help on See Also: 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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Dana No: Strunz No: 02.HB.15





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