Mineralogy Database

Radhakrishnaite Mineral Data

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General Radhakrishnaite Information

Help on Chemical Formula: Chemical Formula: PbTe3(Cl,S)2
Help on Composition: Composition: Molecular Weight = 657.52 gm
   Tellurium  58.22 %  Te
   Lead       31.51 %  Pb
   Sulfur      4.88 %  S
   Chlorine    5.39 %  Cl
             ______ 
             100.00 % 
Help on Empirical Formula: Empirical Formula: PbTe3ClS
Help on Environment: Environment: A primary mineral, in a hydrothermal gold-quartz vein containing sulfides and tellurides.
Help on IMA Status: IMA Status: Approved IMA 1987
Help on Locality: Locality: Champion Reef mine, Kolar gold fields, Karnataka, India. Link to MinDat.org Location Data.
Help on Name Origin: Name Origin: Named after B. P. Radhakrishna (1918-), Indian mineralogist.
Help on Name Pronunciation: Name Pronunciation: Radhakrishnaite + Pronunciation Say RADHAKRISHNAITE
 

Radhakrishnaite Image

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  Radhakrishnaite   Kolarite

Comments: Kolarite (1) and radhakrishnaite (2), replacing altaite (white) in galena (ight grey). (CanMin, v23:501).
Location: 1500 m level, Kolar gold deposit, India. Scale: Scale Bar 0.02 mm.
© Canadian Mineralogist
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  Radhakrishnaite

Comments: Polished Section image of radhakrishnaite (Rad) with bluish to brownish tarnishing colors.
Location: Oktyabrsky Mine, Norilsk, Russia. Scale: Picture Size 0.16 mm.
© Thomas Witzke

Radhakrishnaite Crystallography
Help on Axial Ratios: Axial Ratios: a:c = 1:0.66024
Help on Cell Dimensions: Cell Dimensions: a = 5.71, c = 3.77, Z = 1; V = 122.92 Den(Calc)= 8.88
Help on Crystal System: Crystal System: Tetragonal Space Group: Unk
Help on X Ray Diffraction: X Ray Diffraction: By Intensity(I/Io): 3.16(1), 3.78(0.6), 1.92(0.5),
 

Physical Properties of Radhakrishnaite

Help on Color: Color: Gray, Reddish brown.
Help on Diaphaneity: Diaphaneity: Opaque
Help on Habit: Habit: Aggregates - Made of numerous individual crystals or clusters.
Help on Habit: Habit: Microscopic Crystals - Crystals visible only with microscopes.
Help on Luster: Luster: Metallic
 

Optical Properties of Radhakrishnaite

Help on RL Anisotrophism: RL Anisotrophism: Distinct.
Help on RL Color: RL Color: Rose-brown.
Help on Reflectivity Reflectivity
Standardized Intensity (100%) Reflection Spectra of Radhakrishnaite in Air
λ R1 R2  ∑ R1(λ)   ∑ R2(λ) 
 400 nm   23.70   24.30 
   
 420 nm   24.70   25.20 
 440 nm   25.60   26.10 
 460 nm   26.60   27.10 
 480 nm   27.60   28.20 
 500 nm   28.60   29.20 
 520 nm   29.60   30.10 
 540 nm   30.30   31.00 
 560 nm   31.10   31.80 
 580 nm   31.80   32.40 
 600 nm   32.40   32.90 
 620 nm   32.70   33.30 
 640 nm   33.00   33.50 
 660 nm   33.20   33.60 
 680 nm   33.20   33.60 
 700 nm   33.20   33.60 
Calculated Relative Intensity Colors of Radhakrishnaite in Air
Relative
Intensity		    0%   40%   80% 100% 120% 160% 200% 240% 280% 320% 340%
R1                      
R2                      
 

Calculated Properties of Radhakrishnaite

Help on Electron Density: Electron Density: Bulk Density (Electron Density)=7.32 gm/cc
note: Specific Gravity of Radhakrishnaite =8.88 gm/cc.
Help on Fermion Index: Fermion Index: Fermion Index = 0.11
Boson Index = 0.89
Help on Photoelectric: Photoelectric: PERadhakrishnaite = 804.20 barns/electron
U=PERadhakrishnaite x rElectron Density=5,886.64 barns/cc.
Help on Radioactivity: Radioactivity: GRapi = 0 (Gamma Ray American Petroleum Institute Units)
Radhakrishnaite is Not Radioactive
 

Radhakrishnaite Classification
Help on Dana Class: Dana Class: 02.15.04.01 (02)Sulfides - Including Selenides and Tellurides
  (02.15)(Chlorides)
  (02.15.04)Dana Group
 
02.15.04.01 Radhakrishnaite PbTe3(Cl,S)2 Unk Tetra
Help on Strunz Class: Strunz Class: 03.AA.50 03 - HALIDES
  03.A - Simple Halides, Without H2O
  03.AA -M:X = 1:1, 2:3, 3:5, etc.
 
03.AA.50 Radhakrishnaite PbTe3(Cl,S)2 Unk Tetra
 

Other Radhakrishnaite Information
Help on References: References: NAME( Dana8) PHYS. PROP.(Enc. of Minerals,2nd ed.,1990) OPTIC PROP.(AntBidBlaNic1)
Help on See Also: See Also: Links to other databases for Radhakrishnaite :
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 - MinDAT
10 - Mineralienatlas (Deutsch)
11 - Online Mineral Museum
12 - QUT Mineral Atlas
13 - Ruff.Info

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Radhakrishnaite

PbTe3(Cl,S)2
Dana No: 02.15.04.01 Strunz No: 03.AA.50
Locality:

 

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