Mineralogy Database

Krupkaite Mineral Data

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General Krupkaite Information

Help on Chemical  Formula: Chemical Formula: PbCuBi3S6
Help on Composition: Composition: Molecular Weight = 1,090.08 gm
   Copper    5.83 %  Cu
   Bismuth  57.51 %  Bi
   Lead     19.01 %  Pb
   Sulfur   17.65 %  S
           ______ 
           100.00 % 
Help on Empirical Formula: Empirical Formula: PbCuBi3S6
Help on Environment: Environment: In a vein between gneiss and an orthoclase pegmatite intergrown with bismuthinite.
Help on IMA Status: IMA Status: Approved IMA 1974
Help on Locality: Locality: Krupka, Srredocesky kraj, Czech Republic. Link to MinDat.org Location Data.
Help on Name Origin: Name Origin: Named for the locality.
Help on Name Pronunciation: Name Pronunciation: Krupkaite + Pronunciation Say KRUPKAITE
Help on Synonym: Synonym: ICSD 30776
  PDF 30-490
 

Krupkaite Image

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  Krupkaite   Friedrichite   Benjaminite

Comments: Crystals of a mixture of friedrichite, krupkaite, and benjaminite, with quartz crystals.
Location: Estela Mine, Julcani District, Junin, Peru. Scale: See Photo.
© Jeff Weissman / Photographic Guide to Mineral Species

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  Krupkaite

Comments: Acicular, fine metallic crystal sprays of krupkaite to 4mm with pale yellow manganoan siderite.
Location: Julcani district, Peru. Scale: Picture size 1 cm.
© Tom Loomis / Dakota Matrix

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  Paarite   Krupkaite

Comments: A mosaic of large grains of a low-Cu bismuthinite derivative, decomposed into an intergrowth of paarite (bd42) and krupkaite (bd49).
Location: In quartz veins of the Felbertal scheelite deposit, Salzburg Province, Austria. (CanMin v43:909). Scale: See Image.
© Canadian Mineralogist

Krupkaite Crystallography

Help on Axial Ratios: Axial Ratios: a:b:c =0.3574:1:1.0321
Help on Cell Dimensions: Cell Dimensions: a = 4.003, b = 11.2, c = 11.56, Z = 2; V = 518.28 Den(Calc)= 6.98
Help on Crystal System: Crystal System: Orthorhombic - Pyramidal H-M Symbol (mm2) Space Group: P mc21
Help on X Ray Diffraction: X Ray Diffraction: By Intensity(I/Io): 3.137(1), 2.841(0.37), 3.645(0.3),
 

Physical Properties of Krupkaite

Help on Color: Color: Dark steel gray, Steel gray.
Help on Diaphaneity: Diaphaneity: Opaque
Help on Habit: Habit: Fibrous - Crystals made up of fibers.
Help on Hardness: Hardness: 4 - Fluorite
Help on Luster: Luster: Metallic
Help on Streak: Streak: black
 

Optical Properties of Krupkaite

Help on RL Color: RL Color: Grayish white.
 

Calculated Properties of Krupkaite

Help on Electron Density: Electron Density: Bulk Density (Electron Density)=5.84 gm/cc
note: Specific Gravity of Krupkaite =6.98 gm/cc.
Help on Fermion Index: Fermion Index: Fermion Index = 0.04
Boson Index = 0.96
Help on Photoelectric: Photoelectric: PEKrupkaite =1,459.07 barns/electron
U=PEKrupkaite x rElectron Density=8,520.54 barns/cc.
Help on Radioactivity: Radioactivity: GRapi = 0 (Gamma Ray American Petroleum Institute Units)
Krupkaite is Not Radioactive
 

Krupkaite Classification

Help on  Dana Class: Dana Class: 03.04.05.02 (03)Sulfides - Sulfosalts
  (03.04)where z/y > 3 - (A+)i (A++)j [By Cz], A=metals, B=semi-metals, C=non-metals
  (03.04.05)Aikinite Group (Orthorhombic containing Pb, Cu, Bi, & S)
 
03.04.05.01 Aikinite PbCuBiS3 Pbnm 2/m 2/m 2/m
 
03.04.05.02 Krupkaite PbCuBi3S6 P mc21 mm2
 
03.04.05.03 Gladite PbCuBi5S9 P nma 2/m 2/m 2/m
 
03.04.05.04 Hammarite Pb2Cu2Bi4S9(?) Pbnm 2/m 2/m 2/m
 
03.04.05.05 Friedrichite Pb5Cu5Bi7S18 Pb21m mm2
 
03.04.05.06 Pekoite PbCuBi11(S,Se)18 P 21am mm2
 
03.04.05.07 Lindstromite Pb3Cu3Bi7S15 Pbnm 2/m 2/m 2/m
 
03.04.05.08 Salzburgite! Cu1.6Pb1.6Bi6.4S12 P mc21 mm2
Help on  Strunz Class: Strunz Class: 02.HB.05a 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.05a Aikinite PbCuBiS3 Pbnm 2/m 2/m 2/m
 
02.HB.05a Hammarite Pb2Cu2Bi4S9(?) Pbnm 2/m 2/m 2/m
 
02.HB.05a Gladite PbCuBi5S9 P nma 2/m 2/m 2/m
 
02.HB.05a Friedrichite Pb5Cu5Bi7S18 Pb21m mm2
 
02.HB.05a Lindstromite Pb3Cu3Bi7S15 Pbnm 2/m 2/m 2/m
 
02.HB.05a Krupkaite PbCuBi3S6 P mc21 mm2
 
02.HB.05a Pekoite PbCuBi11(S,Se)18 P 21am mm2
 
02.HB.05a Paarite! Cu1.7Pb1.7Bi6.3S12 Pmcn 2/m 2/m 2/m
 
02.HB.05a Emilite! Cu2.68Pb2.68Bi5.32S12 P mc21 mm2
 
02.HB.05a Salzburgite! Cu1.6Pb1.6Bi6.4S12 P mc21 mm2
 

Other Krupkaite Information

Help on References: References: NAME( AntBidBlaNic1) PHYS. PROP.(Enc. of Minerals,2nd ed.,1990)
Help on See Also: See Also: Links to other databases for Krupkaite :
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 Krupkaite Specimen Label here :

Krupkaite

PbCuBi3S6
Dana No: 03.04.05.02 Strunz No: 02.HB.05a
Locality:

 

Notes:

 

 
   
 


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