Pyrostilpnite Mineral Data

Pyrostilpnite Mineral Data
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General Pyrostilpnite Information

Help on Chemical Formula: Chemical Formula: Ag3SbS3
Help on Composition: Composition: Molecular Weight = 541.55 gm
   Silver    59.75 %  Ag
   Antimony  22.48 %  Sb
   Sulfur    17.76 %  S
            ______ 
            100.00 % 
Help on Empirical Formula: Empirical Formula: Ag3SbS3
Help on Environment: Environment: Found in low-temperature hydrothermal veins as a late-stage mineral. Dimorphous with pyrargyrite.
Help on IMA Status: IMA Status: Valid Species (Pre-IMA) 1868
Help on Locality: Locality: Andreasberg in the Harz Mountains, Germany Link to MinDat.org Location Data.
Help on Name Origin: Name Origin: From the Greek, pyr, "fire" and stilpnos, "shining."
Help on Name Pronunciation: Name Pronunciation: Pyrostilpnite + Pronunciation Say PYROSTILPNITE
Help on Synonym: Synonym: Fire Blende
  ICSD 33714
  PDF 8-129
 

Pyrostilpnite Image

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Pyrostilpnite

Comments: Reddish brown, crystalline aggregate of pyrostilpnite on matrix.
Location: St. Audreasberg, Hartz, Lower Saxony, Germany. Scale: Not Given.
© Lou Perloff / Photo Atlas of Minerals
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Pyrostilpnite

Comments: Deep bright-red, acicular crystals of pyrostilpnite to 1mm in vuggy sulfide matrix.
Location: Cerro Rico, Potosi City, Potosi Dept., Bolivia. Scale: Picture size 5 mm.
© Tom Loomis / Dakota Matrix

Pyrostilpnite Crystallography
Help on Axial Ratios: Axial Ratios: a:b:c =0.4318:1:0.3939
Help on Cell Dimensions: Cell Dimensions: a = 6.84, b = 15.84, c = 6.24, Z = 4; beta = 117.15° V = 601.58 Den(Calc)= 5.98
Help on Crystal System: Crystal System: Monoclinic - PrismaticH-M Symbol (2/m) Space Group: P 21/c
Help on X Ray Diffraction: X Ray Diffraction: By Intensity(I/Io): 3.224(1), 3.12(0.87), 2.841(0.69),
Help on Forms: Forms:

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Forms: ( 0 1 0) ( 2 4 1) ( 1 1 0) ( 1 4 1)

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Kutoglu A , Neues Jahrbuch fur Mineralogie, Monatshefte , 1968 (1968) p.145-160, Die struktur des pyrostilpnits (feuerblende) Ag3SbS3, Locality: St. Andreasberg, Harz Mountains, Germany

 

Physical Properties of Pyrostilpnite

Help on Cleavage: Cleavage: {010} Perfect
Help on Color: Color: Hyacinth red, Orange red.
Help on Density: Density: 4.25 - 5.94, Average = 5.09
Help on Diaphaneity: Diaphaneity: Translucent
Help on Fracture: Fracture: Conchoidal - Fractures developed in brittle materials characterized by smoothly curving surfaces, (e.g. quartz).
Help on Habit: Habit: Acicular - Occurs as needle-like crystals.
Help on Habit: Habit: Crystalline - Fine - Occurs as well-formed fine sized crystals.
Help on Hardness: Hardness: 2 - Gypsum
Help on Luster: Luster: Adamantine
Help on Streak: Streak: orange yellow
 

Optical Properties of Pyrostilpnite

Help on Optical Data: Optical Data: Biaxial (+), a=2.7, b=2.7, g=2.7, bire=0.0000
Help on Pleochroism (x): Pleochroism (x): lemon yellow.
Help on Pleochroism (y): Pleochroism (y): lemon yellow.
Help on Pleochroism (z): Pleochroism (z): lemon yellow.
 

Calculated Properties of Pyrostilpnite

Help on Electron Density: Electron Density: Bulk Density (Electron Density)=5.30 gm/cc
note: Specific Gravity of Pyrostilpnite =5.98 gm/cc.
Help on Fermion Index: Fermion Index: Fermion Index = 0.0013322529
Boson Index = 0.9986677471
Help on Photoelectric: Photoelectric: PEPyrostilpnite = 229.29 barns/electron
U=PEPyrostilpnite x rElectron Density=1,215.30 barns/cc.
Help on Radioactivity: Radioactivity: GRapi = 0 (Gamma Ray American Petroleum Institute Units)
Pyrostilpnite is Not Radioactive
 

Pyrostilpnite Classification
Help on Dana Class: Dana Class: 03.04.02.02 (03)Sulfides - Sulfosalts
  (03.04)where z/y > 3 - (A+)i (A++)j [By Cz], A=metals, B=semi-metals, C=non-metals
  (03.04.02)Xanthoconite Group (Ruby Silver)
 
03.04.02.01 Xanthoconite Ag3AsS3 A2/a 2/m
 
03.04.02.02 Pyrostilpnite Ag3SbS3 P 21/c 2/m
Help on Strunz Class: Strunz Class: 02.GA.10 02 - SULFIDES and SULFOSALTS (sulfides, selenides, tellurides; arsenides, antimonides, bismuthides; sulfarsenites, sulf
  02.G - Sulfarsenites, sulfantimonites, sulfbismuthites
  02.GA -Neso-sulfarsenites, etc., without additional S
 
02.GA.10 Pyrostilpnite Ag3SbS3 P 21/c 2/m
 
02.GA.10 Xanthoconite Ag3AsS3 A2/a 2/m
 

Other Pyrostilpnite Information
Help on References: References: NAME( Duda&Rejl90) PHYS. PROP.(Enc. of Minerals,2nd ed.,1990) OPTIC PROP.(AntBidBlaNic1)
Help on See Also: See Also: Links to other databases for Pyrostilpnite :
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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Pyrostilpnite

Ag3SbS3
Dana No: 03.04.02.02 Strunz No: 02.GA.10
Locality:

 

Notes: