Giessenite Mineral Data

General Giessenite Information

Chemical Formula:

Pb13(Cu,Ag)(Bi,Sb)9S28 (?)

Composition:

Molecular Weight = 5,459.67 gm

Copper 0.87 % Cu

Silver 0.49 % Ag

Bismuth 30.62 % Bi

Antimony 2.23 % Sb

Lead 49.34 % Pb

Sulfur 16.45 % S

______

100.00 %

Empirical Formula:

Pb₁₃Cu_0.75Ag_0.25Bi₈SbS₂₈

Environment:

Hydrothermal origin, with other sulfides.

IMA Status:

Approved IMA 1963

Locality:

From Turtschi, between Giessen and Binn, about 2 km from the Lengenbach quarry, Binntal, Valais, Switzerland. Link to MinDat.org Location Data.

Name Origin:

Named for Giessen, a village nearby the Binntal, Switzerland.

Name Pronunciation:

Giessenite + Pronunciation

Giessenite Image

Images:

Giessenite

Comments: Small clumps of acicular crystal mats of giessenite with rounded cosalite grains (as photographed on pure white fibrous backing material).
Location: Otome Mine, near Kofu, Yamanashi, Japan. Scale: See Photo.
© Jeff Weissman / Photographic Guide to Mineral Species

Giessenite Crystallography

Axial Ratios:

a:b:c =0.9038:1:0.1068

Cell Dimensions:

a = 34.51, b = 38.18, c = 4.08, Z = 4; beta = 90° V = 5,375.77 Den(Calc)= 6.75

Crystal System:

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

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

By Intensity(I/I_o): 3.62(1), 3.15(0.5), 3.32(0.5),

Physical Properties of Giessenite

Color:

Grayish black.

Density:

7.45

Diaphaneity:

Opaque

Habit:

Acicular - Occurs as needle-like crystals.

Habit:

Pseudo Orthorhombic - Crystals show an orthorhombic shape.

Hardness:

2.5 - Finger Nail

Luster:

Metallic

Streak:

grayish black

Calculated Properties of Giessenite

Electron Density:

Bulk Density (Electron Density)=5.59 gm/cc
note: Specific Gravity of Giessenite =6.75 gm/cc.

Fermion Index:

Fermion Index = 0.11
Boson Index = 0.89

Photoelectric:

PE_Giessenite=1,519.12 barns/electron
U=PE_Giessenite x rElectron Density=8,498.62 barns/cc.

Radioactivity:

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

Giessenite Classification

Dana Class:

03.05.12.02 (03)Sulfides - Sulfosalts

(03.05)where 2.5 < z/y < 3 - (A+)i (A++)j [By Cz], A=metals, B=semi-metals, C=non-metals

(03.05.12)Dana Group

03.05.12.01 Izoklakeite Pb27(Cu,Fe)2(Sb,Bi)19S57 Pnnm 2/m 2/m 2/m

03.05.12.02 Giessenite Pb13(Cu,Ag)(Bi,Sb)9S28(?) P 2₁/n 2/m

Strunz Class:

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

02.H - Sulfosalts of SnS Archetype

02.HB -With Cu, Ag, Hg, Fe, Sn and Pb

02.HB.10b Giessenite Pb13(Cu,Ag)(Bi,Sb)9S28(?) P 2₁/n 2/m

02.HB.10b Izoklakeite Pb27(Cu,Fe)2(Sb,Bi)19S57 Pnnm 2/m 2/m 2/m

Other Giessenite Information

References:

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

See Also:

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

Giessenite

Pb13(Cu,Ag)(Bi,Sb)9S28 (?)
Dana No: 03.05.12.02 Strunz No: 02.HB.10b
Locality:

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