Freieslebenite Mineral Data

General Freieslebenite Information

Chemical Formula:

AgPbSbS3

Composition:

Molecular Weight = 533.02 gm

Silver 20.24 % Ag

Antimony 22.84 % Sb

Lead 38.87 % Pb

Sulfur 18.05 % S

______

100.00 %

Empirical Formula:

AgPbSbS₃

Environment:

Of hydrothermal origin.

IMA Status:

Valid Species (Pre-IMA) 1845

Locality:

Felsbanya and Kapnicbanya, Rumania. Link to MinDat.org Location Data.

Name Origin:

For Johann Karl Freiesleben (1774-1846), Mining Commissioner of Saxony, Germany.

Name Pronunciation:

Freieslebenite + Pronunciation

Freieslebenite Image

Images:

Freieslebenite

Comments: Dark gray prismatic crystal of freieslebenite on quartz.
Location: Neue Hoffnung Gottes Mine, BrÃ¤unsdorf, Freiberg District, Erzgebirge, Saxony, Germany. Scale: Picture size 1.5 mm.
© Thomas Witzke / Abraxas-Verlag

Freieslebenite Crystallography

Axial Ratios:

a:b:c =0.5887:1:0.4652

Cell Dimensions:

a = 7.53, b = 12.79, c = 5.95, Z = 4; beta = 92.23° V = 572.60 Den(Calc)= 6.18

Crystal System:

Monoclinic - PrismaticH-M Symbol (2/m) Space Group: P 2₁/n

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

By Intensity(I/I_o): 2.83(1), 3.48(0.8), 2.98(0.7),

Forms:

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Forms: ( 0 3 1) ( 1 1 0) ( 0 1 1) ( 1 0 0)

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Crystal Structure:

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Hellner E , Zeitschrift fur Kristallographie , 109 (1957) p.284-295, Uber komplex zusammengesetzte sulfidische erze. II. Zur struktur des, freieslebenits, PbAgSbS3, Locality: Hiendelaencina, Spain

Physical Properties of Freieslebenite

Cleavage:

{110} Indistinct

Color:

Gray, Silver white, Blackish lead gray.

Density:

6.2 - 6.4, Average = 6.3

Diaphaneity:

Opaque

Fracture:

Brittle - Conchoidal - Very brittle fracture producing small, conchoidal fragments.

Hardness:

2.5 - Finger Nail

Luminescence:

Non-fluorescent.

Luster:

Metallic

Magnetism:

Nonmagnetic

Streak:

whitish gray

Optical Properties of Freieslebenite

RL Anisotrophism:

Just noticeable.

RL Pleochroism:

Very weak.

Reflectivity

**Standardized Intensity (100%) Reflection Spectra of Freieslebenite in Air**
λ	R₁	R₂	∑ R₁(λ)	∑ R₂(λ)
400 nm	39.50	46.70
420 nm	39.40	46.00
440 nm	39.30	45.30
460 nm	39.10	44.60
480 nm	38.70	44.00
500 nm	38.20	43.40
520 nm	37.60	42.80
540 nm	37.00	42.30
560 nm	36.60	41.80
580 nm	36.20	41.40
600 nm	35.80	41.00
620 nm	35.40	40.50
640 nm	35.00	40.00
660 nm	34.50	39.50
680 nm	34.10	38.90
700 nm	33.60	38.30

**Calculated Relative Intensity Colors of Freieslebenite in Air**
Relative Intensity	0%	30%	60%	90%	100%	120%	150%	180%	210%	240%	250%
R₁
R₂

Calculated Properties of Freieslebenite

Electron Density:

Bulk Density (Electron Density)=5.29 gm/cc
note: Specific Gravity of Freieslebenite =6.18 gm/cc.

Fermion Index:

Fermion Index = 0.08
Boson Index = 0.92

Photoelectric:

PE_{Freieslebenite}= 831.05 barns/electron
U=PE_{Freieslebenite} x rElectron Density=4,393.78 barns/cc.

Radioactivity:

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

Freieslebenite Classification

Dana Class:

03.04.06.02 (03)Sulfides - Sulfosalts

(03.04)where z/y > 3 - (A+)i (A++)j [By Cz], A=metals, B=semi-metals, C=non-metals

(03.04.06)Dana Group

03.04.06.01 Marrite PbAgAsS3 P 2₁/a 2/m

03.04.06.02 Freieslebenite AgPbSbS3 P 2₁/n 2/m

Strunz Class:

02.JB.15 02 - SULFIDES and SULFOSALTS (sulfides, selenides, tellurides; arsenides, antimonides, bismuthides; sulfarsenites, sulf

02.J - Sulfosalts of PbS Archetype

02.JB -Galena derivatives, with Pb

02.JB.15 Freieslebenite AgPbSbS3 P 2₁/n 2/m

02.JB.15 Marrite PbAgAsS3 P 2₁/a 2/m

Other Freieslebenite Information

References:

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

See Also:

Links to other databases for Freieslebenite :
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 Freieslebenite Specimen Label here :

Freieslebenite

AgPbSbS3
Dana No: 03.04.06.02 Strunz No: 02.JB.15
Locality:

Notes: