Mineralogy Database

Pararealgar Mineral Data

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General Pararealgar Information

Help on Chemical  Formula: Chemical Formula: AsS
Help on Composition: Composition: Molecular Weight = 106.99 gm
   Arsenic  70.03 %  As
   Sulfur   29.97 %  S
           100.00 % 
Help on Empirical Formula: Empirical Formula: AsS
Help on Environment: Environment: As an alteration product of reagar in stibnite-bearing quartz veins.
Help on IMA Status: IMA Status: Approved IMA 1980
Help on Locality: Locality: Mount Washington copper deposit, Vancouver Island, British Columbia, Canada. Link to MinDat.org Location Data.
Help on Name Origin: Name Origin: Named for its chemical identity with realgar.
Help on Name Pronunciation: Name Pronunciation: Pararealgar + Pronunciation Say PARAREALGAR
Help on Synonym: Synonym: ICSD 80124
  PDF 33-127

Pararealgar Image

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Comments: Orange pararealgar on matrix.
Location: HÃĪnichen, Dresden, Saxony, Germany. Scale: Picture size 5 mm.
© Thomas Witzke / Abraxas-Verlag

Pararealgar Crystallography

Help on Axial Ratios: Axial Ratios: a:b:c =1.0263:1:0.8805
Help on Cell Dimensions: Cell Dimensions: a = 9.909, b = 9.655, c = 8.502, Z = 16; beta = 97.29° V = 806.82 Den(Calc)= 3.52
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): 5.14(1), 5.56(0.91), 3.75(0.78),

Physical Properties of Pararealgar

Help on Cleavage: Cleavage: None
Help on Color: Color: Light yellow, Orange brown, Orange.
Help on Density: Density: 3.52
Help on Fracture: Fracture: Brittle - Uneven - Very brittle fracture producing uneven fragments.
Help on Habit: Habit: Powdery - Forms a loose, poorly-coherent pulverulent mass.
Help on Hardness: Hardness: 1-1.5 - Talc or a little harder
Help on Luster: Luster: Vitreous - Resinous
Help on Streak: Streak: light yellow

Optical Properties of Pararealgar

Help on Optical Data: Optical Data: Biaxial (?), b=2.02
Help on Pleochroism (x): Pleochroism (x): orange yellow.
Help on Pleochroism (y): Pleochroism (y): bright yellow.
Help on Pleochroism (z): Pleochroism (z): orange red.

Calculated Properties of Pararealgar

Help on Electron Density: Electron Density: Bulk Density (Electron Density)=3.22 gm/cc
note: Specific Gravity of Pararealgar =3.52 gm/cc.
Help on Fermion Index: Fermion Index: Fermion Index = 0.0022478773
Boson Index = 0.9977521227
Help on Photoelectric: Photoelectric: PEPararealgar = 51.07 barns/electron
U=PEPararealgar x rElectron Density= 164.67 barns/cc.
Help on Radioactivity: Radioactivity: GRapi = 0 (Gamma Ray American Petroleum Institute Units)
Pararealgar is Not Radioactive

Pararealgar Classification

Help on  Dana Class: Dana Class: (02)Sulfides - Including Selenides and Tellurides
  (02.08)where Am Bn Xp, with (m+n):p=1:1
  (02.08.22)Realgar Series Realgar AsS P 21/n 2/m Pararealgar AsS P 21/c 2/m Uzonite As4S5 P 21/m 2/m Alacranite As8S9 P 2/c 2/m
Help on  Strunz Class: Strunz Class: 02.FA.15b 02 - SULFIDES and SULFOSALTS (sulfides, selenides, tellurides; arsenides, antimonides, bismuthides; sulfarsenites, sulf
  02.F - Sulfides of Arsenic, Alkalies; Sulfides with Halide, Oxide, Hydroxide, H2O
  02.FA -With As, (Sb), S
02.FA.15b Pararealgar AsS P 21/c 2/m

Other Pararealgar 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 Pararealgar :
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.FA.15b





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