Mineralogy Database

Pierrotite Mineral Data

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General Pierrotite Information

Help on Chemical  Formula: Chemical Formula: Tl2Sb6As4S16
Help on Composition: Composition: Molecular Weight = 1,952.01 gm
   Thallium  20.94 %  Tl
   Antimony  37.42 %  Sb
   Arsenic   15.35 %  As
   Sulfur    26.28 %  S
            ______ 
            100.00 % 
Help on Empirical Formula: Empirical Formula: Tl2Sb6As4S16
Help on Environment: Environment: In quartz veins.
Help on IMA Status: IMA Status: Approved IMA 1970
Help on Locality: Locality: Jas Roux, Hautes-Alpes, France. Link to MinDat.org Location Data.
Help on Name Origin: Name Origin: Named for Roland Pierrot (1930-), French mineralogist.
Help on Name Pronunciation: Name Pronunciation: Pierrotite + Pronunciation Say PIERROTITE
Help on Synonym: Synonym: ICSD 31358
  PDF 25-938
 

Pierrotite Image

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  Pierrotite

Comments: Orange-red micro crystals of pierrotite to 0.2 mm..
Location: Jas Roux, Hautes-Alpes, Provence-Alpes-CÃīte d'Azur, France. Scale: Sample Size 1x2 cm.
© Tom Loomis / Dakota Matrix

Pierrotite Crystallography

Help on Axial Ratios: Axial Ratios: a:b:c =4.3949:1:0.9061
Help on Cell Dimensions: Cell Dimensions: a = 38.746, b = 8.816, c = 7.989, Z = 4; V = 2,728.92 Den(Calc)= 4.75
Help on Crystal System: Crystal System: Orthorhombic - Pyramidal H-M Symbol (mm2) Space Group: P na21
Help on X Ray Diffraction: X Ray Diffraction: By Intensity(I/Io): 3.59(1), 2.7(0.9), 3.49(0.9),
 

Physical Properties of Pierrotite

Help on Color: Color: Grayish black.
Help on Density: Density: 4.97
Help on Diaphaneity: Diaphaneity: Opaque
Help on Habit: Habit: Aggregates - Made of numerous individual crystals or clusters.
Help on Habit: Habit: Granular - Generally occurs as anhedral to subhedral crystals in matrix.
Help on Hardness: Hardness: 3.5 - Copper Penny
Help on Luster: Luster: Metallic
Help on Streak: Streak: reddish black
 

Optical Properties of Pierrotite

Help on RL Anisotrophism: RL Anisotrophism: Moderate.
Help on RL Color: RL Color: White, with red internal reflections, dark red in transmitted light.
Help on Reflectivity Reflectivity
Standardized Intensity (100%) Reflection Spectra of Pierrotite in Air
λ R1 R2  ∑ R1(λ)   ∑ R2(λ) 
 400 nm   35.90   39.60 
   
 420 nm   35.20   38.80 
 440 nm   34.50   38.00 
 460 nm   33.70   37.20 
 480 nm   33.10   36.60 
 500 nm   32.50   36.00 
 520 nm   31.90   35.50 
 540 nm   31.30   35.00 
 560 nm   30.70   34.50 
 580 nm   30.20   34.00 
 600 nm   29.70   33.40 
 620 nm   29.10   32.80 
 640 nm   28.60   32.10 
 660 nm   28.00   31.50 
 680 nm   27.40   30.90 
 700 nm   26.70   30.30 
Calculated Relative Intensity Colors of Pierrotite in Air
Relative
Intensity
   0%   40%   80% 100% 120% 160% 200% 240% 280% 300%
R1                    
R2                    
 

Calculated Properties of Pierrotite

Help on Electron Density: Electron Density: Bulk Density (Electron Density)=4.17 gm/cc
note: Specific Gravity of Pierrotite =4.75 gm/cc.
Help on Fermion Index: Fermion Index: Fermion Index = 0.0019712614
Boson Index = 0.9980287386
Help on Photoelectric: Photoelectric: PEPierrotite = 489.53 barns/electron
U=PEPierrotite x rElectron Density=2,039.35 barns/cc.
Help on Radioactivity: Radioactivity: GRapi = 0 (Gamma Ray American Petroleum Institute Units)
Pierrotite is Not Radioactive
 

Pierrotite Classification

Help on  Dana Class: Dana Class: 03.08.07.01 (03)Sulfides - Sulfosalts
  (03.08)where 1 < z/y <2 - (A+)i (A++)j [By Cz], A=metals, B=semi-metals, C=non-metals
  (03.08.07)Dana Group
 
03.08.07.01 Pierrotite Tl2Sb6As4S16 P na21 mm2
Help on  Strunz Class: Strunz Class: 02.HC.05f 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.05f Parapierrotite Tl(Sb,As)5S8 P 21/n 2/m
 
02.HC.05f Pierrotite Tl2Sb6As4S16 P na21 mm2
 

Other Pierrotite Information

Help on References: References: NAME( Dana8) PHYS. PROP.(Dana8) OPTIC PROP.(AntBidBlaNic1)
Help on See Also: See Also: Links to other databases for Pierrotite :
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
15 - WWW-MINCRYST

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Pierrotite

Tl2Sb6As4S16
Dana No: 03.08.07.01 Strunz No: 02.HC.05f
Locality:

 

Notes:

 

 
   
 


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