Bravoite Mineral Data + Say BRAVOITE


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General Bravoite Information
Help on Chemical Formula: Chemical Formula: (Fe,Ni,Co)S2
Help on Composition: Composition: Molecular Weight = 120.86 gm
   Iron    32.35 %  Fe
   Cobalt   4.88 %  Co
   Nickel   9.71 %  Ni
   Sulfur  53.06 %  S
          ______ 
          100.00 % 
Help on Empirical Formula: Empirical Formula: Fe2+0.7Ni0.2Co0.1S2
Help on Environment: Environment: Nickel-rich variety of pyrite which is gray in color.
Help on IMA Status: IMA Status: Discredited IMA 1989
Help on Locality: Locality: Gey, Rhineland-Palatinate, Germany. Link to MinDat.org Location Data.
Help on Name Origin: Name Origin: Named in 1907 after the Peruvian scientist, J. J. Bravo (1874-1928).
Help on Synonym: Synonym: ICSD 40329
  Nickelian Pyrite
  PDF 3-1131
 

Bravoite Image

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Bravoite

Comments: Steel gray, metallic crystal of bravoite on brassy yellow chalcopyrite.
Location: Gey, Rhineland-Palatinate, Germany. Scale: Size Not Given.
© Lou Perloff / Photo Atlas of Minerals

Bravoite Crystallography
Help on Cell Dimensions: Cell Dimensions: a = 5.58, Z = 4; V = 173.74 Den(Calc)= 4.62
Help on Crystal System: Crystal System: Isometric - DiploidalH-M Symbol (2/m 3) Space Group: P a3
Help on X Ray Diffraction: X Ray Diffraction: By Intensity(I/Io): 1.68(1)(113), 2.79(0.96)(200), 1.97(0.52)(220),2.49(0.49)(210), 2.27(0.41)(112), 3.21(0.41)(111), 1.61(0.16)(222),
Help on Forms: Forms:

Mouse
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Help on Above

Forms: [ 1 0 0] [ 1 0 2]

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Physical Properties of Bravoite

Help on Cleavage: Cleavage: None
Help on Color: Color: Steel gray.
Help on Density: Density: 5 - 5.02, Average = 5.01
Help on Diaphaniety: Diaphaniety: Opaque
Help on Fracture: Fracture: Conchoidal - Fractures developed in brittle materials characterized by smoothly curving surfaces, (e.g. quartz).
Help on Habit: Habit: Druse - Crystal growth in a cavity which results in numerous crystal tipped surfaces.
Help on Habit: Habit: Stalactitic - Shaped like pendant columns as stalactites or stalagmites (e.g. calcite).
Help on Habit: Habit: Striated - Parallel lines on crystal surface or cleavage face.
Help on Hardness: Hardness: 6.5 - Pyrite
Help on Luster: Luster: Metallic
Help on Streak: Streak: black
 

Optical Properties of Bravoite

Help on Reflectivity Reflectivity
Standardized Intensity (100%) Reflection Spectra of Bravoite in Air
λ R  ∑ R(λ) 
 400 nm   36.20   
 420 nm   35.60 
 440 nm   35.00 
 460 nm   34.60 
 480 nm   34.70 
 500 nm   35.00 
 520 nm   35.60 
 540 nm   36.30 
 560 nm   36.80 
 580 nm   37.40 
 600 nm   38.00 
 620 nm   38.70 
 640 nm   39.40 
 660 nm   40.20 
 680 nm   40.80 
 700 nm   41.20 
Calculated Relative Intensity Colors of Bravoite in Air
Relative
Intensity		    0%   30%   60%   90% 100% 120% 150% 180% 210% 240% 250%
R                      
 

Calculated Properties of Bravoite

Help on Electron Density: Electron Density:

relectron=4.47 gm/cc
note: rBravoite =4.62 gm/cc.
Help on Fermion Index Fermion Index Fermion Index = 0.01193
Boson Index = 0.98807
Help on Photoelectric: Photoelectric:

PEBravoite = 18.13 barns/electron
U=PEBravoite x relectron= 81.10 barns/cc.
Help on Radioactivity: Radioactivity: GRapi = 0 (Gamma Ray American Petroleum Institute Units)

Bravoite is Not Radioactive
 

Bravoite Classification
Help on Dana Class: Dana Class: 2.0.0.0 (2)Sulfide Minerals
  (2.0)Without Dana Classification Numbers
  (Pyrite Group)
Help on Strunz Class: Strunz Class: II/X.00-00 II - Sulfides and sulphosalts
  II/X - Unclassified Strunz Sulfides and sulphosalts
  II/X.00 - Pyrite Group
 

Other Bravoite Information
Help on References: References: NAME( Duda&Rejl90) PHYS. PROP.(Sinkankas66) OPTIC PROP.(AntBidBlaNic1)
Help on See Also: See Also: Links to other databases for Bravoite :
1 -Am. Min. Crystal Structure Database 2 - Applied Mineralogy 3 -Athena 4 - Crocoite.com Mineral Locations 5 -Google Images 6 -Google Scholar 7 -MinDAT 8 -MinMax(Deutsch) 9 -MinMax(English) 10 -Mineralienatlas (Deutsch) 11 -QUT Mineral Atlas 12 - Scandinavian mineral gallery 13 - WWW-MINCRYST

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Translate Bravoite Mineral Data :

Ask about Bravoite here :
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Print or Cut-and-Paste your Bravoite Specimen Label here :

Bravoite

(Fe,Ni,Co)S2
Dana No: Unknown Strunz No: II/X.00-00
Locality:

 

Notes:

 
 
   
 
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