Robinsonite Mineral Data

General Robinsonite Information

Chemical Formula:

Pb4Sb6S13

Composition:

Molecular Weight = 1,976.16 gm

Antimony 36.97 % Sb

Lead 41.94 % Pb

Sulfur 21.09 % S

______

100.00 %

Empirical Formula:

Pb₄Sb₆S₁₃

Environment:

A primary hydrothermal mineral.

IMA Status:

Valid Species (Pre-IMA) 1952

Locality:

Red Bird mercury mine, Pershing County, Nevada, USA. Link to MinDat.org Location Data.

Name Origin:

Named for Stephen Clive Robinson (1911-), Geological Survey of Canada, who first synthesized the mineral.

Name Pronunciation:

Robinsonite + Pronunciation

Synonym:

ICSD 300109

PDF 42-563

Robinsonite Image

Images:

Robinsonite

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

Axial Ratios:

a:b:c =5.9542:1:6.1472

Cell Dimensions:

a = 23.698, b = 3.98, c = 24.466, Z = 4; beta = 93.9° V = 2,302.24 Den(Calc)= 5.70

Crystal System:

Monoclinic - Prismatic H-M Symbol (2/m) Space Group: I2/m

$Help on X Ray Diffraction:$ X Ray Diffraction:

By Intensity(I/I_o): 3.39(1), 3.92(0.8), 4.04(0.8),

Physical Properties of Robinsonite

Cleavage:

None

Color:

Bluish lead gray.

Density:

5.64 - 5.75, Average = 5.69

Diaphaneity:

Opaque

Fracture:

Brittle - Uneven - Very brittle fracture producing uneven fragments.

Habit:

Massive - Fibrous - Distinctly fibrous fine-grained forms.

Habit:

Prismatic - Crystals Shaped like Slender Prisms (e.g. tourmaline).

Habit:

Striated - Parallel lines on crystal surface or cleavage face.

Hardness:

2.5-3 - Finger Nail-Calcite

Luster:

Metallic

Optical Properties of Robinsonite

RL Anisotrophism:

Strong, in blue-gray, cream-white and brown-gray.

Calculated Properties of Robinsonite

Electron Density:

Bulk Density (Electron Density)=4.86 gm/cc
note: Specific Gravity of Robinsonite =5.70 gm/cc.

Fermion Index:

Fermion Index = 0.09
Boson Index = 0.91

Photoelectric:

PE_Robinsonite= 884.36 barns/electron
U=PE_Robinsonite x rElectron Density=4,295.59 barns/cc.

Radioactivity:

GRapi = 0 (Gamma Ray American Petroleum Institute Units)
Robinsonite is Not Radioactive

Robinsonite Classification

Dana Class:

03.06.16.01 (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

03.06.16.01 Robinsonite Pb4Sb6S13 I2/m 2/m

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

References:

NAME( AntBidBlaNic1) PHYS. PROP.(Enc. of Minerals,2nd ed.,1990) OPTIC PROP.(AntBidBlaNic1)

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
15 - WWW-MINCRYST

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Print or Cut-and-Paste your Robinsonite Specimen Label here :

Robinsonite

Pb4Sb6S13
Dana No: 03.06.16.01 Strunz No: 02.HC.20
Locality:

Notes:

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