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Nordstromite Mineral Data
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General Nordstromite Information
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 Chemical Formula: |
Pb3CuBi7(S10Se4) |
| Composition: |
Molecular Weight = 2,784.51 gm |
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Copper 2.28 % Cu |
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Bismuth 52.54 % Bi |
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Lead 22.32 % Pb |
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Selenium 11.34 % Se |
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Sulfur 11.52 % S |
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______ |
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100.00 % |
| Empirical Formula: |
Pb3CuBi7S10Se4 |
| Environment: |
Of hydrothermal origin. |
| IMA Status: |
Approved IMA 1980 |
| Locality: |
Falun (Fahlun), Kopparberg, Sweden. Link to MinDat.org Location Data. |
| Name Origin: |
Named for T. Nordstrom. |
| Name Pronunciation: |
Nordstromite + Pronunciation  |
| Synonym: |
Nordstroemite |
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Nordstromite Image |
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Images:
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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 |
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Nordstromite Crystallography
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| Axial Ratios: |
a:b:c =4.3722:1:4.2871 |
| Cell Dimensions: |
a = 17.97, b = 4.11, c = 17.62, Z = 2; beta = 94.3° V = 1,297.69 Den(Calc)= 7.13 |
| Crystal System: |
Monoclinic - Prismatic H-M Symbol (2/m) Space Group: P 21/m |
| X Ray Diffraction: |
By Intensity(I/Io): 3.066(1), 2.242(0.7), 3.583(0.5), |
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Physical Properties of Nordstromite
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| Color: |
Gray. |
| Diaphaneity: |
Opaque |
| Habit: |
Fibrous - Crystals made up of fibers. |
| Hardness: |
2-2.5 - Gypsum-Finger Nail |
| Luster: |
Metallic |
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Optical Properties of Nordstromite
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| Optical Data: |
NCalc= 1.91 - from Gladstone-Dale relationship (KC = 0.1276) where Ncalc=Dcalc*KC+1
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| RL Anisotrophism: |
Dark gray to brown. |
| RL Color: |
White with a gray tint. |
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Calculated Properties of Nordstromite
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| Electron Density: |
Bulk Density (Electron Density)=5.90 gm/cc
note: Specific Gravity of Nordstromite =7.13 gm/cc.
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| Fermion Index: |
Fermion Index = 0.05
Boson Index = 0.95 |
| Photoelectric: |
PENordstromite =1,447.43 barns/electron
U=PENordstromite x rElectron Density=8,539.26 barns/cc.
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| Radioactivity: |
GRapi = 0 (Gamma Ray American Petroleum Institute Units)
Nordstromite is Not Radioactive |
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Nordstromite Classification
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| Dana Class: |
03.07.13.01 (03)Sulfides - Sulfosalts |
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(03.07)where z/y = 2 - (A+)i (A++)j [By Cz], A=metals, B=semi-metals, C=non-metals |
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(03.07.13)Dana Group |
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03.07.13.01 Nordstromite Pb3CuBi7(S10Se4) P 21/m 2/m |
| Strunz Class: |
02.JB.25c 02 - SULFIDES and SULFOSALTS (sulfides, selenides, tellurides; arsenides, antimonides, bismuthides; sulfarsenites, sulf |
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02.J - Sulfosalts of PbS Archetype |
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02.JB -Galena derivatives, with Pb |
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02.JB.25c Nordstromite Pb3CuBi7(S10Se4) P 21/m 2/m |
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Other Nordstromite Information
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| References: |
NAME( AntBidBlaNic1) PHYS. PROP.(Enc. of Minerals,2nd ed.,1990) OPTIC PROP.(AntBidBlaNic1) |
| 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
15 - WWW-MINCRYST
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Nordstromite
Pb3CuBi7(S10Se4)
Dana No: 03.07.13.01 Strunz No: 02.JB.25c
Locality:
Notes:
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