Mineralogy Database

Wakabayashilite Mineral Data

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General Wakabayashilite Information

Help on Chemical  Formula: Chemical Formula: [(As,Sb)6S9][As4S5]
Help on Composition: Composition: Molecular Weight = 1,291.80 gm
   Antimony  18.85 %  Sb
   Arsenic   46.40 %  As
   Sulfur    34.75 %  S
            100.00 % 
Help on Empirical Formula: Empirical Formula: As4Sb2S9As4S5
Help on Environment: Environment: As fibers in druses of quartz or embedded in calcite.
Help on IMA Status: IMA Status: Approved IMA 1970
Help on Locality: Locality: Nishinomaki mine, Gumma prefrecture, Japan Link to MinDat.org Location Data.
Help on Name Origin: Name Origin: Named for Yaichiro Wakabayashi (1874-1943), mineralogist for Mitsubishi Mining.
Help on Name Pronunciation: Name Pronunciation: Wakabayashilite + Pronunciation Say WAKABAYASHILITE

Wakabayashilite Image

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Comments: Golden colored, acicular crystals of wakabayashilite on matrix.
Location: White Cap mine, Nye County, Nevada, USA. Scale: Picture size 3 cm.
© Dave Barthelmy

Wakabayashilite Crystallography

Help on Axial Ratios: Axial Ratios: a:b:c =1.7346:1:0.4457
Help on Cell Dimensions: Cell Dimensions: a = 25.262, b = 14.563, c = 6.492, Z = 4; V = 2,388.34 Den(Calc)= 3.59
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): 6.28(1), 3.49(0.8), 4.78(0.7),

Physical Properties of Wakabayashilite

Help on Cleavage: Cleavage: {100} Perfect, {010} Perfect, {101} Perfect
Help on Color: Color: Golden yellow, Lemon.
Help on Density: Density: 3.98
Help on Diaphaneity: Diaphaneity: Translucent
Help on Fracture: Fracture: Flexible - Flexible fragments.
Help on Habit: Habit: Fibrous - Crystals made up of fibers.
Help on Hardness: Hardness: 1.5 - Between Talc and Gypsum
Help on Luster: Luster: Silky
Help on Streak: Streak: orange

Optical Properties of Wakabayashilite

Help on RL Anisotrophism: RL Anisotrophism: Weak.
Help on RL Color: RL Color: Golden yellow to lemon-yellow, with golden internal reflections.
Help on RL Pleochroism: RL Pleochroism: Strong.
Help on Reflectivity Reflectivity
Standardized Intensity (100%) Reflection Spectra of Wakabayashilite in Air
λ R  ∑ R(λ) 
 400 nm   28.40   
 420 nm   27.80 
 440 nm   27.20 
 460 nm   26.00 
 480 nm   24.50 
 500 nm   23.30 
 520 nm   22.50 
 540 nm   22.00 
 560 nm   21.80 
 580 nm   21.60 
 600 nm   21.60 
 620 nm   21.50 
 640 nm   21.40 
 660 nm   21.30 
 680 nm   21.20 
 700 nm   21.20 
Calculated Relative Intensity Colors of Wakabayashilite in Air
   0%   50% 100% 150% 200% 250% 300% 350% 400%

Calculated Properties of Wakabayashilite

Help on Electron Density: Electron Density: Bulk Density (Electron Density)=3.28 gm/cc
note: Specific Gravity of Wakabayashilite =3.59 gm/cc.
Help on Fermion Index: Fermion Index: Fermion Index = 0.0026063929
Boson Index = 0.9973936071
Help on Photoelectric: Photoelectric: PEWakabayashilite = 95.48 barns/electron
U=PEWakabayashilite x rElectron Density= 313.10 barns/cc.
Help on Radioactivity: Radioactivity: GRapi = 0 (Gamma Ray American Petroleum Institute Units)
Wakabayashilite is Not Radioactive

Wakabayashilite Classification

Help on  Dana Class: Dana Class: (02)Sulfides - Including Selenides and Tellurides
  (02.11)where Am Bn Xp, with (m+n):p=2:3
  (02.11.04)Dana Group Wakabayashilite [(As,Sb)6S9][As4S5] P na21 mm2
Help on  Strunz Class: Strunz Class: 02.FA.40 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.40 Wakabayashilite [(As,Sb)6S9][As4S5] P na21 mm2

Other Wakabayashilite Information

Help on References: References: NAME( AntBidBlaNic1) PHYS. PROP.(AmMin, v90, no7, p1108) OPTIC PROP.(AntBidBlaNic1)
Help on See Also: See Also: Links to other databases for Wakabayashilite :
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.40





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