Stephanite Mineral Data (original) (raw)

General Stephanite Information

Help on Chemical Formula: Chemical Formula:

Ag5SbS4

Help on Composition: Composition:

Molecular Weight = 789.36 gm

Silver 68.33 % Ag

Antimony 15.42 % Sb

Sulfur 16.25 % S

______

100.00 %

Help on Empirical Formula: Empirical Formula:

Ag5SbS4

Help on Environment: Environment:

A late-stage mineral in hydrothermal silver deposits.

Help on IMA Status: IMA Status:

Valid Species (Pre-IMA) 1845

Help on Locality: Locality:

Freiberg, Sachsen (Saxony), Germany. Link to MinDat.org Location Data.

Help on Name Origin: Name Origin:

Named after Archduke Victor Stephan (1817-1867). Former Austrian Mining Director and engineer,

Help on Name Pronunciation: Name Pronunciation:

Stephanite + Pronunciation Say STEPHANITE

Help on Synonym: Synonym:

Brittle Silver Ore

ICSD 16987

PDF 11-108

Stephanite Image

Click Here for Larger Stephanite Image in a New Browser Window Images:

Click Here for Larger Stephanite Image Stephanite Comments: Group of steel gray lustrous stephanite crystals to 8 mm in diameter. Caleb Simkoff Collection. Location: Freiberg, Saxony, Germany.Scale: 10 x 12 x 23 mm. © Dan Weinrich

Click Here for Larger Stephanite Image in a New Browser Window Images:

Click Here for Larger Stephanite Image Stephanite Silver Comments: Thick, ropy, native silver wires with blocky, well-crystallized stephanite on white and tan calcite matrix. Location: Freiberg, Erzgebirge, Saxony, Alemania, Germay.Scale: Picture size 3 cm. © Fabre Minerals

Stephanite Crystallography

Help on Axial Ratios: Axial Ratios:

a:b:c =0.6338:1:0.6918

Help on Cell Dimensions: Cell Dimensions:

a = 7.793, b = 12.295, c = 8.506, Z = 4; V = 815.00 Den(Calc)= 6.43

Help on Crystal System: Crystal System:

Orthorhombic - PyramidalH-M Symbol (mm2) Space Group: C mc21

Help on X Ray Diffraction: X Ray Diffraction:

By Intensity(I/Io): 3.08(1), 2.58(0.9), 2.89(0.6),

Help on Forms: Forms:

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| | Forms:( 0 1 0) ( 0 2 1) ( 1 1 0) ( 1 1 1) ( 0 0 1) Warning: this large pop-up is very compute intensive and may not work well with some computers. | | ----------------------------------------------------------------------------------------------------------------------------------------------------------------------------- |

Click Here for Large Stephanite Structure Window Crystal Structure:

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| | Ribar B , Nowacki W , Acta Crystallographica, Section B , 26 (1970) p.201-207, Die kristallstruktur von stephanit, [SbS3|S|Ag5] | | ------------------------------------------------------------------------------------------------------------------------------------- |

Physical Properties of Stephanite

Help on Cleavage: Cleavage:

{010} Imperfect, {021} Poor

Help on Color: Color:

Lead gray, Black.

Help on Density: Density:

6.2 - 6.3, Average = 6.25

Help on Diaphaneity: Diaphaneity:

Opaque

Help on Fracture: Fracture:

Sub Conchoidal - Fractures developed in brittle materials characterized by semi-curving surfaces.

Help on Habit: Habit:

Massive - Uniformly indistinguishable crystals forming large masses.

Help on Habit: Habit:

Pseudo Hexagonal - Crystals show a hexagonal outline.

Help on Habit: Habit:

Tabular - Form dimensions are thin in one direction.

Help on Hardness: Hardness:

2-2.5 - Gypsum-Finger Nail

Help on Luminescence: Luminescence:

Non-fluorescent.

Help on Luster: Luster:

Metallic

Help on Magnetism: Magnetism:

Nonmagnetic

Help on Streak: Streak:

black

Optical Properties of Stephanite

Help on RL Anisotrophism: RL Anisotrophism:

Strong, in vivid colors.

Help on RL Color: RL Color:

White-gray.

Help on RL Pleochroism: RL Pleochroism:

Very weak, white to pink-white.

Help on Reflectivity Reflectivity

Standardized Intensity (100%) Reflection Spectra of Stephanite in Air

λ R1 R 2 ∑ R1(λ) ∑ R2(λ)
400 nm 31.00 31.80
420 nm 30.80 31.60
440 nm 30.60 31.40
460 nm 30.20 31.10
480 nm 29.70 30.80
500 nm 29.00 30.30
520 nm 28.20 29.70
540 nm 27.60 29.00
560 nm 27.00 28.50
580 nm 26.50 28.10
600 nm 26.20 28.00
620 nm 26.10 27.90
640 nm 26.00 27.80
660 nm 26.00 27.60
680 nm 26.20 27.40
700 nm 26.60 27.00

Calculated Relative Intensity Colors of Stephanite in Air

RelativeIntensity 0% 40% 80% 100% 120% 160% 200% 240% 280% 320% 330%
R1
R2

Calculated Properties of Stephanite

Help on Electron Density: Electron Density:

Bulk Density (Electron Density)=5.70 gm/cc
note: Specific Gravity of Stephanite =6.43 gm/cc.

Help on Fermion Index: Fermion Index:

Fermion Index = 0.0012186912
Boson Index = 0.9987813088

Help on Photoelectric: Photoelectric:

PEStephanite = 227.71 barns/electron
U=PEStephanite x rElectron Density=1,298.42 barns/cc.

Help on Radioactivity: Radioactivity:

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

Stephanite Classification

Help on Dana Class: Dana Class:

03.02.04.01 (03)Sulfides - Sulfosalts

(03.02)where z/y = 4 - (A+)i (A++)j [By Cz], A=metals, B=semi-metals, C=non-metals

(03.02.04)Stephanite Series

03.02.04.01 Stephanite Ag5SbS4 C mc21 mm2

03.02.04.02 Selenostephanite Ag5Sb(Se,S)4 P 212121 2 2 2

Help on Strunz Class: Strunz Class:

02.GB.10 02 - SULFIDES and SULFOSALTS (sulfides, selenides, tellurides; arsenides, antimonides, bismuthides; sulfarsenites, sulf

02.G - Sulfarsenites, sulfantimonites, sulfbismuthites

02.GB -Neso-sulfarsenites, etc

02.GB.10 Selenostephanite Ag5Sb(Se,S)4 P 212121 2 2 2

02.GB.10 Stephanite Ag5SbS4 C mc21 mm2

Other Stephanite 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 Stephanite :
1 - Am. Min. Crystal Structure Database
2 - Amethyst Galleries' Mineral Gallery
3 - Athena
4 - EUROmin Project
5 - Ecole des Mines de Paris
6 - GeoScienceWorld
7 - Google Images
8 - Google Scholar
9 - Handbook of Mineralogy (MinSocAm)
10 - Handbook of Mineralogy (UofA)
11 - HyperPhysics
12 - MinDAT
13 - Mineralienatlas (Deutsch)
14 - Online Mineral Museum
15 - QUT Mineral Atlas
16 - Ruff.Info
17 - WWW-MINCRYST

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Ask about Stephanite here :
Ask-A-Mineralogist from the Mineralogical Society of America
Mindat.org's Discussion Groups
Original Rockhounds Discussion Group
Rockhounds Discussion Group on Yahoo Groups
Mineral Discussion Forum from Fabre Minerals - also available in Espa�ol

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

Stephanite

Ag5SbS4
Dana No: 03.02.04.01 Strunz No: 02.GB.10
Locality:

Notes: