Mineralogy Database

Nordstromite Mineral Data

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General Nordstromite Information

Help on Chemical  Formula: Chemical Formula: Pb3CuBi7(S10Se4)
Help on Composition: Composition: Molecular Weight = 2,784.51 gm
   Copper     2.28 %  Cu
   Bismuth   52.54 %  Bi
   Lead      22.32 %  Pb
   Selenium  11.34 %  Se
   Sulfur    11.52 %  S
            100.00 % 
Help on Empirical Formula: Empirical Formula: Pb3CuBi7S10Se4
Help on Environment: Environment: Of hydrothermal origin.
Help on IMA Status: IMA Status: Approved IMA 1980
Help on Locality: Locality: Falun (Fahlun), Kopparberg, Sweden. Link to MinDat.org Location Data.
Help on Name Origin: Name Origin: Named for T. Nordstrom.
Help on Name Pronunciation: Name Pronunciation: Nordstromite + Pronunciation Say NORDSTROMITE
Help on Synonym: Synonym: Nordstroemite

Nordstromite Image

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  Nordstromite   Weibullite

Comments: Fibrous, silvery crystals of nordstromite. Lacking a chemical analysis it is possible that the crystal is weibullite instead.
Location: Falu mine, Falun, Sweden. Scale: Crystal Size 1 mm.
© Tom Loomis / Dakota Matrix

Nordstromite Crystallography

Help on Axial Ratios: Axial Ratios: a:b:c =4.3722:1:4.2871
Help on Cell Dimensions: Cell Dimensions: a = 17.97, b = 4.11, c = 17.62, Z = 2; beta = 94.3° V = 1,297.69 Den(Calc)= 7.13
Help on Crystal System: Crystal System: Monoclinic - Prismatic H-M Symbol (2/m) Space Group: P 21/m
Help on X Ray Diffraction: X Ray Diffraction: By Intensity(I/Io): 3.066(1), 2.242(0.7), 3.583(0.5),

Physical Properties of Nordstromite

Help on Color: Color: Gray.
Help on Diaphaneity: Diaphaneity: Opaque
Help on Habit: Habit: Fibrous - Crystals made up of fibers.
Help on Hardness: Hardness: 2-2.5 - Gypsum-Finger Nail
Help on Luster: Luster: Metallic

Optical Properties of Nordstromite

Help on Optical Data: Optical Data: NCalc= 1.91 - from Gladstone-Dale relationship (KC = 0.1276) where Ncalc=Dcalc*KC+1
Help on RL Anisotrophism: RL Anisotrophism: Dark gray to brown.
Help on RL Color: RL Color: White with a gray tint.

Calculated Properties of Nordstromite

Help on Electron Density: Electron Density: Bulk Density (Electron Density)=5.90 gm/cc
note: Specific Gravity of Nordstromite =7.13 gm/cc.
Help on Fermion Index: Fermion Index: Fermion Index = 0.05
Boson Index = 0.95
Help on Photoelectric: Photoelectric: PENordstromite =1,447.43 barns/electron
U=PENordstromite x rElectron Density=8,539.26 barns/cc.
Help on Radioactivity: Radioactivity: GRapi = 0 (Gamma Ray American Petroleum Institute Units)
Nordstromite is Not Radioactive

Nordstromite Classification

Help on  Dana Class: Dana Class: (03)Sulfides - Sulfosalts
  (03.07)where z/y = 2 - (A+)i (A++)j [By Cz], A=metals, B=semi-metals, C=non-metals
  (03.07.13)Dana Group Nordstromite Pb3CuBi7(S10Se4) P 21/m 2/m
Help on  Strunz Class: Strunz Class: 02.JB.25c 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.25c Nordstromite Pb3CuBi7(S10Se4) P 21/m 2/m

Other Nordstromite 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 Nordstromite :
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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Dana No: Strunz No: 02.JB.25c





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