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Wakabayashilite Mineral Data
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General Wakabayashilite Information
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 Chemical Formula: |
[(As,Sb)6S9][As4S5] |
| Composition: |
Molecular Weight = 1,291.80 gm |
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Antimony 18.85 % Sb |
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Arsenic 46.40 % As |
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Sulfur 34.75 % S |
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______ |
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100.00 % |
| Empirical Formula: |
As4Sb2S9As4S5 |
| Environment: |
As fibers in druses of quartz or embedded in calcite. |
| IMA Status: |
Approved IMA 1970 |
| Locality: |
Nishinomaki mine, Gumma prefrecture, Japan Link to MinDat.org Location Data. |
| Name Origin: |
Named for Yaichiro Wakabayashi (1874-1943), mineralogist for Mitsubishi Mining. |
| Name Pronunciation: |
Wakabayashilite + Pronunciation  |
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Wakabayashilite Image |
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Images:
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Wakabayashilite
Comments: Golden colored, acicular crystals of wakabayashilite on matrix.
Location: White Cap mine, Nye County, Nevada, USA.
Scale: Picture size 3 cm.
© Dave Barthelmy |
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Wakabayashilite Crystallography
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| Axial Ratios: |
a:b:c =1.7346:1:0.4457 |
| Cell Dimensions: |
a = 25.262, b = 14.563, c = 6.492, Z = 4; V = 2,388.34 Den(Calc)= 3.59 |
| Crystal System: |
Orthorhombic - Pyramidal H-M Symbol (mm2) Space Group: P na21 |
| X Ray Diffraction: |
By Intensity(I/Io): 6.28(1), 3.49(0.8), 4.78(0.7), |
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Physical Properties of Wakabayashilite
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| Cleavage: |
{100} Perfect, {010} Perfect, {101} Perfect |
| Color: |
Golden yellow, Lemon. |
| Density: |
3.98 |
| Diaphaneity: |
Translucent |
| Fracture: |
Flexible - Flexible fragments. |
| Habit: |
Fibrous - Crystals made up of fibers. |
| Hardness: |
1.5 - Between Talc and Gypsum |
| Luster: |
Silky |
| Streak: |
orange |
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Optical Properties of Wakabayashilite
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| RL Anisotrophism: |
Weak. |
| RL Color: |
Golden yellow to lemon-yellow, with golden internal reflections. |
| RL Pleochroism: |
Strong. |
| Reflectivity |
Standardized Intensity (100%) Reflection Spectra of Wakabayashilite in Air
| λ |
R |
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∑ R(λ) |
| 400 nm |
28.40 |
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| 420 nm |
27.80 |
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| 440 nm |
27.20 |
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| 460 nm |
26.00 |
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| 480 nm |
24.50 |
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| 500 nm |
23.30 |
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| 520 nm |
22.50 |
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| 540 nm |
22.00 |
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| 560 nm |
21.80 |
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| 580 nm |
21.60 |
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| 600 nm |
21.60 |
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| 620 nm |
21.50 |
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| 640 nm |
21.40 |
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| 660 nm |
21.30 |
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| 680 nm |
21.20 |
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| 700 nm |
21.20 |
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Calculated Relative Intensity Colors of Wakabayashilite in Air
Relative
Intensity |
0% |
50% |
100% |
150% |
200% |
250% |
300% |
350% |
400% |
| R |
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Calculated Properties of Wakabayashilite
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| Electron Density: |
Bulk Density (Electron Density)=3.28 gm/cc
note: Specific Gravity of Wakabayashilite =3.59 gm/cc.
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| Fermion Index: |
Fermion Index = 0.0026063929
Boson Index = 0.9973936071 |
| Photoelectric: |
PEWakabayashilite = 95.48 barns/electron
U=PEWakabayashilite x rElectron Density= 313.10 barns/cc.
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| Radioactivity: |
GRapi = 0 (Gamma Ray American Petroleum Institute Units)
Wakabayashilite is Not Radioactive |
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Wakabayashilite Classification
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| Dana Class: |
02.11.04.01 (02)Sulfides - Including Selenides and Tellurides |
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(02.11)where Am Bn Xp, with (m+n):p=2:3 |
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(02.11.04)Dana Group |
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02.11.04.01 Wakabayashilite [(As,Sb)6S9][As4S5] P na21 mm2 |
| Strunz Class: |
02.FA.40 02 - SULFIDES and SULFOSALTS (sulfides, selenides, tellurides; arsenides, antimonides, bismuthides; sulfarsenites, sulf |
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02.F - Sulfides of Arsenic, Alkalies; Sulfides with Halide, Oxide, Hydroxide, H2O |
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02.FA -With As, (Sb), S |
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02.FA.40 Wakabayashilite [(As,Sb)6S9][As4S5] P na21 mm2 |
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Other Wakabayashilite Information
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| References: |
NAME( AntBidBlaNic1) PHYS. PROP.(AmMin, v90, no7, p1108) OPTIC PROP.(AntBidBlaNic1) |
| 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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Wakabayashilite
[(As,Sb)6S9][As4S5]
Dana No: 02.11.04.01 Strunz No: 02.FA.40
Locality:
Notes:
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