Mineralogy Database

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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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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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 - Prismatic H-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:

Dbl Clk - Start-Stop Rotation
RMB - Cycle Display Modes
Drag1 - Manipulate Crystal
Drag2 - Resize

S - Stereo
I - Indicies
<space> - Start-Stop Rotation
F - Fit to Screen
M - Menu

Help on Above

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

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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)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) Xanthoconite Ag3AsS3 A2/a 2/m 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 - 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

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Dana No: Strunz No: 02.GA.10





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