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Sorbyite Mineral Data
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General Sorbyite Information
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 Chemical Formula: |
Pb19(Sb,As)20S49 |
| Composition: |
Molecular Weight = 5,737.49 gm |
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Antimony 3.61 % Sb |
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Arsenic 0.39 % As |
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Lead 68.62 % Pb |
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Sulfur 27.39 % S |
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______ |
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100.00 % |
| Empirical Formula: |
Pb19Sb1.7As0.3S49 |
| Environment: |
Hydrothermal origin, in marble or limestone, replacing pyrite and sphalerite with other Pb-As.Sb sulfides. |
| IMA Status: |
Approved IMA 1967 |
| Locality: |
In Canada, from near Madoc, Ontario. Link to MinDat.org Location Data. |
| Name Origin: |
Named for Henry Clifton Sorby (1826-1908), English chemist and the founder of metallography. |
| Name Pronunciation: |
Sorbyite  |
| Synonym: |
IMA1966-031 |
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Sorbyite Image |
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Images:
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Sorbyite Crystallography
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| Axial Ratios: |
a:b:c =5.445:1:3.1994 |
| Cell Dimensions: |
a = 45.15, b = 8.292, c = 26.53, Z = 5; beta = 113.417° V = 9,114.34 Den(Calc)= 5.23 |
| Crystal System: |
Monoclinic - Prismatic H-M Symbol (2/m) Space Group: C 2/m |
| X Ray Diffraction: |
By Intensity(I/Io): 3.44(1), 3.38(0.9), 4.13(0.6), |
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Physical Properties of Sorbyite
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| Cleavage: |
{001} Perfect |
| Color: |
Lead gray, Black. |
| Density: |
5.52 |
| Diaphaneity: |
Opaque |
| Habit: |
Striated - Parallel lines on crystal surface or cleavage face. |
| Habit: |
Tabular - Form dimensions are thin in one direction. |
| Hardness: |
3.5-4 - Copper Penny-Fluorite |
| Luster: |
Metallic |
| Streak: |
metallic |
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Optical Properties of Sorbyite
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| RL Anisotrophism: |
Strong. |
| RL Color: |
White. |
| RL Pleochroism: |
Strong. |
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Calculated Properties of Sorbyite
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| Electron Density: |
Bulk Density (Electron Density)=4.45 gm/cc
note: Specific Gravity of Sorbyite =5.23 gm/cc.
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| Fermion Index: |
Fermion Index = 0.15
Boson Index = 0.85 |
| Photoelectric: |
PESorbyite =1,253.58 barns/electron
U=PESorbyite x rElectron Density=5,573.19 barns/cc.
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| Radioactivity: |
GRapi = 0 (Gamma Ray American Petroleum Institute Units)
Sorbyite is Not Radioactive |
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Sorbyite Classification
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| Dana Class: |
03.06.12.01 (03)Sulfides - Sulfosalts |
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(03.06)where 2 < z/y < 2.49 - (A+)i (A++)j [By Cz], A=metals, B=semi-metals, C=non-metals |
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(03.06.12)Dana Group |
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03.06.12.01 Sorbyite Pb19(Sb,As)20S49 C 2/m 2/m |
| Strunz Class: |
02.LB.60 02 - SULFIDES and SULFOSALTS (sulfides, selenides, tellurides; arsenides, antimonides, bismuthides; sulfarsenites, sulf |
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02.L - Unclassified Sulfosalts |
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02.LB -With essential Pb |
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02.LB.60 Sorbyite Pb19(Sb,As)20S49 C 2/m 2/m |
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Other Sorbyite Information
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| References: |
NAME( AntBidBlaNic1) PHYS. PROP.(Enc. of Minerals,2nd ed.,1990) OPTIC PROP.(AntBidBlaNic1) |
| See Also: |
Links to other databases for Sorbyite :
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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Print or Cut-and-Paste your Sorbyite Specimen Label here :
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Sorbyite
Pb19(Sb,As)20S49
Dana No: 03.06.12.01 Strunz No: 02.LB.60
Locality:
Notes:
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