Mineralogy Database

Robinsonite Mineral Data

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General Robinsonite Information

Help on Chemical  Formula: Chemical Formula: Pb4Sb6S13
Help on Composition: Composition: Molecular Weight = 1,976.16 gm
   Antimony  36.97 %  Sb
   Lead      41.94 %  Pb
   Sulfur    21.09 %  S
            100.00 % 
Help on Empirical Formula: Empirical Formula: Pb4Sb6S13
Help on Environment: Environment: A primary hydrothermal mineral.
Help on IMA Status: IMA Status: Valid Species (Pre-IMA) 1952
Help on Locality: Locality: Red Bird mercury mine, Pershing County, Nevada, USA. Link to MinDat.org Location Data.
Help on Name Origin: Name Origin: Named for Stephen Clive Robinson (1911-), Geological Survey of Canada, who first synthesized the mineral.
Help on Name Pronunciation: Name Pronunciation: Robinsonite + Pronunciation Say ROBINSONITE
Help on Synonym: Synonym: ICSD 300109
  PDF 42-563

Robinsonite Image

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Comments: Dark gray, prismatic-acicular crystals of robinsonite on white marble.
Location: Pitone Quarry, Seravezza, Lucca, Italy. Scale: Picture size 2 cm.
© Dave Barthelmy

Robinsonite Crystallography

Help on Axial Ratios: Axial Ratios: a:b:c =5.9542:1:6.1472
Help on Cell Dimensions: Cell Dimensions: a = 23.698, b = 3.98, c = 24.466, Z = 4; beta = 93.9° V = 2,302.24 Den(Calc)= 5.70
Help on Crystal System: Crystal System: Monoclinic - Prismatic H-M Symbol (2/m) Space Group: I2/m
Help on X Ray Diffraction: X Ray Diffraction: By Intensity(I/Io): 3.39(1), 3.92(0.8), 4.04(0.8),

Physical Properties of Robinsonite

Help on Cleavage: Cleavage: None
Help on Color: Color: Bluish lead gray.
Help on Density: Density: 5.64 - 5.75, Average = 5.69
Help on Diaphaneity: Diaphaneity: Opaque
Help on Fracture: Fracture: Brittle - Uneven - Very brittle fracture producing uneven fragments.
Help on Habit: Habit: Massive - Fibrous - Distinctly fibrous fine-grained forms.
Help on Habit: Habit: Prismatic - Crystals Shaped like Slender Prisms (e.g. tourmaline).
Help on Habit: Habit: Striated - Parallel lines on crystal surface or cleavage face.
Help on Hardness: Hardness: 2.5-3 - Finger Nail-Calcite
Help on Luster: Luster: Metallic

Optical Properties of Robinsonite

Help on RL Anisotrophism: RL Anisotrophism: Strong, in blue-gray, cream-white and brown-gray.

Calculated Properties of Robinsonite

Help on Electron Density: Electron Density: Bulk Density (Electron Density)=4.86 gm/cc
note: Specific Gravity of Robinsonite =5.70 gm/cc.
Help on Fermion Index: Fermion Index: Fermion Index = 0.09
Boson Index = 0.91
Help on Photoelectric: Photoelectric: PERobinsonite = 884.36 barns/electron
U=PERobinsonite x rElectron Density=4,295.59 barns/cc.
Help on Radioactivity: Radioactivity: GRapi = 0 (Gamma Ray American Petroleum Institute Units)
Robinsonite is Not Radioactive

Robinsonite Classification

Help on  Dana Class: Dana Class: (03)Sulfides - Sulfosalts
  (03.06)where 2 < z/y < 2.49 - (A+)i (A++)j [By Cz], A=metals, B=semi-metals, C=non-metals
  (03.06.16)Dana Group Robinsonite Pb4Sb6S13 I2/m 2/m
Help on  Strunz Class: Strunz Class: 02.HC.20 02 - SULFIDES and SULFOSALTS (sulfides, selenides, tellurides; arsenides, antimonides, bismuthides; sulfarsenites, sulf
  02.H - Sulfosalts of SnS Archetype
  02.HC -With only Pb
02.HC.20 Robinsonite Pb4Sb6S13 I2/m 2/m

Other Robinsonite 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 Robinsonite :
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.HC.20





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