Sorbyite Mineral Data

General Sorbyite Information

Chemical Formula:

Pb19(Sb,As)20S49

Composition:

Molecular Weight = 5,737.49 gm

Antimony 3.61 % Sb

Arsenic 0.39 % As

Lead 68.62 % Pb

Sulfur 27.39 % S

______

100.00 %

Empirical Formula:

Pb₁₉Sb_1.7As_0.3S₄₉

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

Sorbyite Image

Images:

Sorbyite

Comments: Gray metallic sorbyite stringers in white quartz.
Location: Candelaria, Mineral County, Nevada, USA. Scale: See Photo.
© Jeff Weissman / Photographic Guide to Mineral Species

Sorbyite Crystallography

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 - PrismaticH-M Symbol (2/m) Space Group: C 2/m

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

By Intensity(I/I_o): 3.44(1), 3.38(0.9), 4.13(0.6),

Physical Properties of Sorbyite

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

Optical Properties of Sorbyite

RL Anisotrophism:

Strong.

RL Color:

White.

RL Pleochroism:

Strong.

Calculated Properties of Sorbyite

Electron Density:

Bulk Density (Electron Density)=4.45 gm/cc
note: Specific Gravity of Sorbyite =5.23 gm/cc.

Fermion Index:

Fermion Index = 0.15
Boson Index = 0.85

Photoelectric:

PE_Sorbyite=1,253.58 barns/electron
U=PE_Sorbyite x rElectron Density=5,573.19 barns/cc.

Radioactivity:

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

Sorbyite Classification

Dana Class:

03.06.12.01 (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

(03.06.12)Dana Group

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

02.L - Unclassified Sulfosalts

02.LB -With essential Pb

02.LB.60 Sorbyite Pb19(Sb,As)20S49 C 2/m 2/m

Other Sorbyite Information

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 :

Sorbyite

Pb19(Sb,As)20S49
Dana No: 03.06.12.01 Strunz No: 02.LB.60
Locality:

Notes: