Parapierrotite Mineral Data

Parapierrotite Mineral Data
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General Parapierrotite Information

Help on Chemical Formula: Chemical Formula: Tl(Sb,As)5S8
Help on Composition: Composition: Molecular Weight = 1,041.56 gm
   Thallium  19.62 %  Tl
   Antimony  51.43 %  Sb
   Arsenic    4.32 %  As
   Sulfur    24.63 %  S
            ______ 
            100.00 % 
Help on Empirical Formula: Empirical Formula: TlSb4.4As0.6S8
Help on Environment: Environment: Hydrothermal origin, in cavities in realgar.
Help on IMA Status: IMA Status: Approved IMA 1975
Help on Locality: Locality: Allchar, Macedonia, Yugoslavia. Link to MinDat.org Location Data.
Help on Name Origin: Name Origin: Named for its relationship to pierrotite.
Help on Name Pronunciation: Name Pronunciation: Parapierrotite + Pronunciation Say PARAPIERROTITE
Help on Synonym: Synonym: ICSD 100291
  PDF 29-1330
 

Parapierrotite Image

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Parapierrotite

Comments: Silvery metallic prismatic parapierrotite grains in translucent quartz rock.
Location: Lookout Pass, Tooele County, Utah, USA. Scale: See Photo.
© Jeff Weissman / Photographic Guide to Mineral Species
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Parapierrotite

Comments: Black semimetallic fragment of parapierrotite.
Location: Lookout Pass Area, southeast Tooele County, Utah, USA. Scale: See Image.
© Rruff Database

Parapierrotite Crystallography
Help on Axial Ratios: Axial Ratios: a:b:c =0.4144:1:0.4666
Help on Cell Dimensions: Cell Dimensions: a = 8.02, b = 19.35, c = 9.03, Z = 4; beta = 91.967° V = 1,400.51 Den(Calc)= 4.94
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): 2.832(1), 3.493(1), 4.15(0.9),
Help on Forms: Forms:

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Forms: ( 0 1 0) ( 1 0 1) ( 1 0 0) ( 0 0 1)

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Engel P , Zeitschrift fur Kristallographie , 151 (1980) p.203-216, Die kristallstruktur von synthetischem parapierrotit, TlSb5S8, Locality: synthetic

 

Physical Properties of Parapierrotite

Help on Cleavage: Cleavage: None
Help on Color: Color: Black.
Help on Density: Density: 5.04
Help on Diaphaneity: Diaphaneity: Opaque
Help on Habit: Habit: Prismatic - Crystals Shaped like Slender Prisms (e.g. tourmaline).
Help on Hardness: Hardness: 2.5-3 - Finger Nail-Calcite
Help on Luster: Luster: Sub Metallic
Help on Streak: Streak: gray
 

Optical Properties of Parapierrotite

Help on RL Anisotrophism: RL Anisotrophism: Distinct, brownish gray to bluish gray.
Help on RL Color: RL Color: White with a creamy tint with rare purple-red internal reflections.
Help on RL Pleochroism: RL Pleochroism: Weak in air , grayish white to brownish gray in oil.
Help on Reflectivity Reflectivity
Standardized Intensity (100%) Reflection Spectra of Parapierrotite in Air
λ R1 R2  ∑ R1(λ)   ∑ R2(λ) 
 400 nm   31.70   42.80 
   
 420 nm   31.30   42.20 
 440 nm   30.90   41.60 
 460 nm   30.30   41.10 
 480 nm   29.90   40.60 
 500 nm   29.50   40.30 
 520 nm   29.30   40.00 
 540 nm   29.10   39.70 
 560 nm   28.80   39.20 
 580 nm   28.60   38.50 
 600 nm   28.20   37.90 
 620 nm   27.90   37.10 
 640 nm   27.30   36.10 
 660 nm   26.70   35.10 
 680 nm   26.00   34.10 
 700 nm   26.60   34.20 
Calculated Relative Intensity Colors of Parapierrotite in Air
Relative
Intensity		    0%   40%   80% 100% 120% 160% 200% 240% 280% 320%
R1                    
R2                    
 

Calculated Properties of Parapierrotite

Help on Electron Density: Electron Density: Bulk Density (Electron Density)=4.30 gm/cc
note: Specific Gravity of Parapierrotite =4.94 gm/cc.
Help on Fermion Index: Fermion Index: Fermion Index = 0.0018471832
Boson Index = 0.9981528168
Help on Photoelectric: Photoelectric: PEParapierrotite = 510.13 barns/electron
U=PEParapierrotite x rElectron Density=2,193.00 barns/cc.
Help on Radioactivity: Radioactivity: GRapi = 0 (Gamma Ray American Petroleum Institute Units)
Parapierrotite is Not Radioactive
 

Parapierrotite Classification
Help on Dana Class: Dana Class: 03.08.14.01 (03)Sulfides - Sulfosalts
  (03.08)where 1 < z/y <2 - (A+)i (A++)j [By Cz], A=metals, B=semi-metals, C=non-metals
  (03.08.14)Dana Group
 
03.08.14.01 Parapierrotite Tl(Sb,As)5S8 P 21/n 2/m
 
03.08.14.02 Bernardite Tl(As,Sb)5S8 P 21/c 2/m
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 Parapierrotite 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 Parapierrotite :
1 - Am. Min. Crystal Structure Database
2 - Athena
3 - EUROmin Project
4 - Ecole des Mines de Paris
5 - Google Images
6 - Google Scholar
7 - Handbook of Mineralogy (MinSocAm)
8 - Handbook of Mineralogy (UofA)
9 - MinDAT
10 - MinMax(Deutsch)
11 - MinMax(English)
12 - Mineralienatlas (Deutsch)
13 - QUT Mineral Atlas
14 - Ruff.Info
15 - WWW-MINCRYST

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Parapierrotite

Tl(Sb,As)5S8
Dana No: 03.08.14.01 Strunz No: 02.HC.05f
Locality:

 

Notes: