Rathite Mineral Data

Rathite Mineral Data
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General Rathite Information

Help on Chemical Formula: Chemical Formula: Pb8Pb4-x(Tl2As2)x(Ag2As2)As16S40
Help on Composition: Composition: Molecular Weight = 5,369.42 gm
   Thallium   1.90 %  Tl
   Silver     4.02 %  Ag
   Arsenic   25.81 %  As
   Lead      44.38 %  Pb
   Sulfur    23.89 %  S
            ______ 
            100.00 % 
Help on Empirical Formula: Empirical Formula: Pb11.5Tl0.5Ag2As18.5S40
Help on Environment: Environment: In crystalline dolomite with other Pb-As-S minerals.
Help on IMA Status: IMA Status: Valid Species (Pre-IMA) 1896
Help on Locality: Locality: Binnental, Switzerland. Link to MinDat.org Location Data.
Help on Name Origin: Name Origin: Named for Gerhard von Rath (1830-1888), Professor of Mineralogy, Bonn, Germany.
Help on Name Pronunciation: Name Pronunciation: Rathite Say RATHITE
Help on Synonym: Synonym: ICSD 26778
  PDF 9-426
  Rathite-I - rathite or dufrenoysite
  Wiltshireite
  gamma-Rathite
 

Rathite Image

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Rathite

Comments: Gray metallic foliated rathite, with pyrite in sugary dolomite.
Location: Lengenbach Quarry, Binnental, Valais, Switzerland. Scale: See Photo.
© Jeff Weissman / Photographic Guide to Mineral Species
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Rathite

Comments: Black prismatic crystal of rathite with glossy surface and red realgar on white dolomite.
Location: Lengenbach quarry, Binntal, Valais, Switzerland. Scale: Crystal length 5 mm.
© Walter Gabriel

Rathite Crystallography
Help on Axial Ratios: Axial Ratios: a:b:c =1.0661:1:3.1524
Help on Cell Dimensions: Cell Dimensions: a = 8.496, b = 7.969, c = 25.122, Z = 1; beta = 100.704° V = 1,671.28 Den(Calc)= 5.33
Help on Crystal System: Crystal System: Monoclinic - PrismaticH-M Symbol (2/m) Space Group: P 21/n
Help on X Ray Diffraction: X Ray Diffraction: By Intensity(I/Io): 2.75(1), 3.6(0.8), 3.39(0.7),
Click Here for Large Rathite Structure Window Crystal Structure:

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Engel P , Nowacki W , Zeitschrift fur Kristallographie , 131 (1970) p.356-375, Die kristallstruktur von rathit-II [As25 S56|PbVII6.5 PBIX12], Locality: Lengenbach, Binnatal, Switzerland

 

Physical Properties of Rathite

Help on Cleavage: Cleavage: {100} Perfect, {010} Parting
Help on Color: Color: Lead gray.
Help on Density: Density: 5.41
Help on Diaphaneity: Diaphaneity: Nearly opaque
Help on Fracture: Fracture: Sub Conchoidal - Fractures developed in brittle materials characterized by semi-curving surfaces.
Help on Habit: Habit: Prismatic - Crystals Shaped like Slender Prisms (e.g. tourmaline).
Help on Hardness: Hardness: 3 - Calcite
Help on Luster: Luster: Metallic
Help on Streak: Streak: dark brown
 

Optical Properties of Rathite

Help on RL Anisotrophism: RL Anisotrophism: Intense, olive-green or yellow and bluish violet.
Help on RL Color: RL Color: White with deep red internal reflections.
Help on RL Pleochroism: RL Pleochroism: Strong.
Help on Reflectivity Reflectivity
Standardized Intensity (100%) Reflection Spectra of Rathite in Air
λ R1 R2  ∑ R1(λ)   ∑ R2(λ) 
 400 nm   38.60   42.90 
   
 420 nm   37.80   42.20 
 440 nm   37.00   41.50 
 460 nm   36.20   41.00 
 480 nm   35.50   40.50 
 500 nm   34.90   40.00 
 520 nm   34.30   39.60 
 540 nm   33.80   39.20 
 560 nm   33.30   38.60 
 580 nm   32.80   38.00 
 600 nm   32.20   37.10 
 620 nm   31.60   36.20 
 640 nm   30.80   35.40 
 660 nm   30.00   34.70 
 680 nm   29.20   34.10 
 700 nm   28.40   33.60 
Calculated Relative Intensity Colors of Rathite in Air
Relative
Intensity		    0%   30%   60%   90% 100% 120% 150% 180% 210% 240% 270% 280%
R1                        
R2                        
 

Calculated Properties of Rathite

Help on Electron Density: Electron Density: Bulk Density (Electron Density)=4.62 gm/cc
note: Specific Gravity of Rathite =5.33 gm/cc.
Help on Fermion Index: Fermion Index: Fermion Index = 0.09
Boson Index = 0.91
Help on Photoelectric: Photoelectric: PERathite = 849.12 barns/electron
U=PERathite x rElectron Density=3,924.49 barns/cc.
Help on Radioactivity: Radioactivity: GRapi = 0 (Gamma Ray American Petroleum Institute Units)
Rathite is Not Radioactive
 

Rathite Classification
Help on Dana Class: Dana Class: 03.07.12.01 (03)Sulfides - Sulfosalts
  (03.07)where z/y = 2 - (A+)i (A++)j [By Cz], A=metals, B=semi-metals, C=non-metals
  (03.07.12)Dana Group
 
03.07.12.01 Rathite Pb8Pb4-x(Tl2As2)x(Ag2As2)As16S40 P 21/n 2/m
Help on Strunz Class: Strunz Class: 02.HC.05d 02 - SULFIDES and SULFOSALTS (sulfides, selenides, tellurides; arsenides, antimonides, bismuthides; sulfarsenites, sulf
  02.H - Sulfosalts of SnS Archetype
  02.HC -With only Pb
 
02.HC.05d Dufrenoysite Pb2As2S5 P 21/m 2/m
 
02.HC.05d Rathite Pb8Pb4-x(Tl2As2)x(Ag2As2)As16S40 P 21/n 2/m
 
02.HC.05d Veenite Pb2(Sb,As)2S5 P 21cn mm2
 

Other Rathite Information
Help on References: References: NAME( AntBidBlaNic2) PHYS. PROP.(Enc. of Minerals,2nd ed.,1990, AmMin, v 89, p 471) OPTIC PROP.(AntBidBlaNic1)
Help on See Also: See Also: Links to other databases for Rathite :
1 - Am. Min. Crystal Structure Database
2 - Athena
3 - GeoScienceWorld
4 - Google Images
5 - Google Scholar
6 - Handbook of Mineralogy (MinSocAm)
7 - Handbook of Mineralogy (UofA)
8 - MinDAT
9 - Mineralienatlas (Deutsch)
10 - Online Mineral Museum
11 - QUT Mineral Atlas
12 - Ruff.Info
13 - WWW-MINCRYST

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Rathite

Pb8Pb4-x(Tl2As2)x(Ag2As2)As16S40
Dana No: 03.07.12.01 Strunz No: 02.HC.05d
Locality:

 

Notes: