Diaphorite Mineral Data + Say DIAPHORITE


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General Diaphorite Information
Help on Chemical Formula: Chemical Formula: Pb2Ag3Sb3S8
Help on Composition: Composition: Molecular Weight = 1,359.78 gm
   Silver    23.80 %  Ag
   Antimony  26.86 %  Sb
   Lead      30.48 %  Pb
   Sulfur    18.87 %  S
            ______ 
            100.00 % 
Help on Empirical Formula: Empirical Formula: Pb2Ag3Sb3S8
Help on Environment: Environment: In hydrothermal veins with other sulfides, formed at a moderate temperature.
Help on IMA Status: IMA Status: Valid Species (Pre-IMA) 1871
Help on Locality: Locality: Himmelsfürst Mine, Brand-Erbisdorf, Freiberg District, Erzgebirge, Saxony, Germany. Link to MinDat.org Location Data.
Help on Name Origin: Name Origin: From the Greek diaphora, "difference" as being distinct from freieslebenite.
Help on Synonym: Synonym: Brongniardite
  ICSD 38568
  PDF 9-126
 

Diaphorite Image

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Diaphorite

Comments: Prismatic, striated, metallic diaphorite crystal on quartz.
Location: Morey, Nye County, Nevada, USA. Scale: Not Given.
© Lou Perloff / Photo Atlas of Minerals

Diaphorite Crystallography
Help on Axial Ratios: Axial Ratios: a:b:c =0.4937:1:0.1839
Help on Cell Dimensions: Cell Dimensions: a = 15.84, b = 32.08, c = 5.9, Z = 8; beta = 90.165° V = 2,998.06 Den(Calc)= 6.02
Help on Crystal System: Crystal System: Monoclinic - PrismaticH-M Symbol (2/m) Space Group: C 21/a
Help on X Ray Diffraction: X Ray Diffraction: By Intensity(I/Io): 3.296(1), 2.809(0.8), 2.945(0.4),
Help on Forms: Forms:

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Forms: [ 4 0 1] [ 0 8 1] [ 1 1 0] [ 2 0 1] [ 1 0 0]

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Armbruster T , Makovicky E , Berlepsch P , Sejkora J , European Journal of Mineralogy , 15 (2003) p.137-146, Crystal structure, cation ordering, and polytypic character of diaphorite,, Pb2Ag3Sb3S8, a PbS-based structure

 

Physical Properties of Diaphorite

Help on Cleavage: Cleavage: None
Help on Color: Color: Gray, Steel gray.
Help on Density: Density: 6 - 6.2, Average = 6.1
Help on Diaphaniety: Diaphaniety: Opaque
Help on Fracture: Fracture: Brittle - Generally displayed by glasses and most non-metallic minerals.
Help on Habit: Habit: Euhedral Crystals - Occurs as well-formed crystals showing good external form.
Help on Habit: Habit: Granular - Generally occurs as anhedral to subhedral crystals in matrix.
Help on Habit: Habit: Striated - Parallel lines on crystal surface or cleavage face.
Help on Hardness: Hardness: 2.5 - Finger Nail
Help on Luminescence: Luminescence: Non-fluorescent.
Help on Luster: Luster: Metallic
Help on Magnetism: Magnetism: Nonmagnetic
Help on Streak: Streak: steel gray
 

Optical Properties of Diaphorite

Help on RL Anisotrophism: RL Anisotrophism: Strong.
Help on RL Color: RL Color: White to grayish white.
Help on Reflectivity Reflectivity
Standardized Intensity (100%) Reflection Spectra of Diaphorite in Air
λ R1 R2  ∑ R1(λ)   ∑ R2(λ) 
 400 nm   41.20   44.40 
   
 420 nm   40.60   43.60 
 440 nm   40.00   43.00 
 460 nm   39.40   42.50 
 480 nm   38.80   42.00 
 500 nm   38.30   41.60 
 520 nm   37.80   41.10 
 540 nm   37.30   40.70 
 560 nm   36.90   40.30 
 580 nm   36.50   39.80 
 600 nm   36.20   39.50 
 620 nm   35.80   39.10 
 640 nm   35.50   38.60 
 660 nm   35.00   38.20 
 680 nm   34.50   37.60 
 700 nm   33.80   37.00 
Calculated Relative Intensity Colors of Diaphorite in Air
Relative
Intensity		    0%   30%   60%   90% 100% 120% 150% 180% 210% 240% 250%
R1                      
R2                      
 

Calculated Properties of Diaphorite

Help on Electron Density: Electron Density:

relectron=5.19 gm/cc
note: rDiaphorite =6.02 gm/cc.
Help on Fermion Index Fermion Index Fermion Index = 0.06876
Boson Index = 0.93124
Help on Photoelectric: Photoelectric:

PEDiaphorite = 698.49 barns/electron
U=PEDiaphorite x relectron=3,624.24 barns/cc.
Help on Radioactivity: Radioactivity: GRapi = 0 (Gamma Ray American Petroleum Institute Units)

Diaphorite is Not Radioactive
 

Diaphorite Classification
Help on Dana Class: Dana Class: 3.5.4.1 (3)Sulfides - Sulfosalts
  (3.5)where 2.5 < z/y < 3 - (A+)i (A++)j [By Cz], A=metals, B=semi-metals, C=non-metals
  (3.5.4)Dana Group
 
3.5.4.1 Diaphorite Pb2Ag3Sb3S8 C 21/a 2/m
Help on Strunz Class: Strunz Class: II/E.17-30 II - Sulfides and sulphosalts
  II/E - Sulfosalts (S : As,Sb,Bi = x) Lead-Sulfosalts with As/Sb, x=3,0-2,5
  II/E.17 - Marrite - Owyheeite series
 
II/E.17-10 Marrite PbAgAsS3 P 21/a 2/m
 
II/E.17-20 Freieslebenite AgPbSbS3 P 21/n 2/m
 
II/E.17-30 Diaphorite Pb2Ag3Sb3S8 C 21/a 2/m
 
II/E.17-40 Zoubekite AgPb4Sb4S10 Unk Ortho
 
II/E.17-50 Owyheeite Pb7Ag2(Sb,Bi)8S20 Pnam 2/m 2/m 2/m
 

Other Diaphorite 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 Diaphorite :
1 -Am. Min. Crystal Structure Database 2 -Athena 3 - Crocoite.com Mineral Locations 4 - EUROmin Project 5 -Google Images 6 -Google Scholar 7 -Handbook of Mineralogy (UofA) 8 -MinDAT 9 -MinMax(Deutsch) 10 -MinMax(English) 11 -Mineralienatlas (Deutsch) 12 -QUT Mineral Atlas 13 -École des Mines de Paris

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Diaphorite

Pb2Ag3Sb3S8
Dana No: 3.5.4.1 Strunz No: II/E.17-30
Locality:

 

Notes:

 
 
   
 
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