Mineralogy Database

Djerfisherite Mineral Data

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General Djerfisherite Information

Help on Chemical  Formula: Chemical Formula: K6Na(Fe,Cu,Ni)25S26Cl
Help on Composition: Composition: Molecular Weight = 2,500.72 gm
   Potassium   9.38 %  K
   Sodium      0.92 %  Na
   Iron       42.43 %  Fe
   Copper     10.16 %  Cu
   Nickel      2.35 %  Ni
   Sulfur     33.34 %  S
   Chlorine    1.42 %  Cl
             100.00 % 
Help on Empirical Formula: Empirical Formula: K6NaFe2+19Cu4NiS26Cl
Help on Environment: Environment: Hydrothermal Cu-Ni ores, in skarns, in pegmatites, in kimberlites and in a mafic alkalic diatreme.
Help on IMA Status: IMA Status: Approved IMA 1966
Help on Locality: Locality: Coyote Peak, Humbolt County, California. Link to MinDat.org Location Data.
Help on Name Origin: Name Origin: Named for Daniel Jerome Fisher (1896-1988), American mineralogist.
Help on Name Pronunciation: Name Pronunciation: Djerfisherite + Pronunciation Say DJERFISHERITE
Help on Synonym: Synonym: ICSD 200005
  PDF 25-635

Djerfisherite Image

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Comments: Bronze metallic grains of djerfisherite in white feldspar.
Location: Khibiny Massif, Kola Peninsula, Murmansk District, Russia. Scale: See Photo.
© Jeff Weissman / Photographic Guide to Mineral Species

Djerfisherite Crystallography

Help on Cell Dimensions: Cell Dimensions: a = 10.41, Z = 1; V = 1,128.11 Den(Calc)= 3.68
Help on Crystal System: Crystal System: Isometric - Hexoctahedral H-M Symbol (4/m 3 2/m) Space Group: P m3m
Help on X Ray Diffraction: X Ray Diffraction: By Intensity(I/Io): 1.828(1), 2.985(0.7), 2.372(0.6),

Physical Properties of Djerfisherite

Help on Color: Color: Bronze brown, Greenish brown, Olive green.
Help on Diaphaneity: Diaphaneity: Opaque
Help on Habit: Habit: Granular - Generally occurs as anhedral to subhedral crystals in matrix.
Help on Hardness: Hardness: 3.5 - Copper Penny
Help on Luster: Luster: Sub Metallic

Optical Properties of Djerfisherite

Help on RL Color: RL Color: Greenish yellow, close to khaki, to olive-drab.
Help on Reflectivity Reflectivity
Standardized Intensity (100%) Reflection Spectra of Djerfisherite in Air
λ R  ∑ R(λ) 
 400 nm   17.50   
 420 nm   18.30 
 440 nm   19.10 
 460 nm   20.00 
 480 nm   20.80 
 500 nm   21.60 
 520 nm   22.30 
 540 nm   22.90 
 560 nm   23.50 
 580 nm   24.00 
 600 nm   24.50 
 620 nm   24.90 
 640 nm   25.20 
 660 nm   25.50 
 680 nm   25.80 
 700 nm   25.90 
Calculated Relative Intensity Colors of Djerfisherite in Air
   0%   50% 100% 150% 200% 250% 300% 350% 400% 450%

Calculated Properties of Djerfisherite

Help on Electron Density: Electron Density: Bulk Density (Electron Density)=3.52 gm/cc
note: Specific Gravity of Djerfisherite =3.68 gm/cc.
Help on Fermion Index: Fermion Index: Fermion Index = 0.01
Boson Index = 0.99
Help on Photoelectric: Photoelectric: PEDjerfisherite = 21.17 barns/electron
U=PEDjerfisherite x relectron= 74.52 barns/cc.
Help on Radioactivity: Radioactivity:

GRapi = 129.45 (Gamma Ray American Petroleum Institute Units)
Concentration of Djerfisherite per GRapi unit = 0.77 (%)

Estimated Radioactivity from Djerfisherite - barely detectable


Djerfisherite Classification

Help on  Dana Class: Dana Class: (02)Sulfides - Including Selenides and Tellurides
  (02.15.02)Djerfisherite Group Djerfisherite K6Na(Fe,Cu,Ni)25S26Cl P m3m 4/m 3 2/m Thalfenisite Tl6(Fe,Ni,Cu)25S26Cl P m3m 4/m 3 2/m Owensite (Ba,Pb)6(Cu,Fe,Ni)25S27 P m3m 4/m 3 2/m
Help on  Strunz Class: Strunz Class: 02.FC.05 02 - SULFIDES and SULFOSALTS (sulfides, selenides, tellurides; arsenides, antimonides, bismuthides; sulfarsenites, sulf
  02.F - Sulfides of Arsenic, Alkalies; Sulfides with Halide, Oxide, Hydroxide, H2O
  02.FC -With Cl, Br, I (halide-sulfides)
02.FC.05 Djerfisherite K6Na(Fe,Cu,Ni)25S26Cl P m3m 4/m 3 2/m
02.FC.05 Owensite (Ba,Pb)6(Cu,Fe,Ni)25S27 P m3m 4/m 3 2/m
02.FC.05 Thalfenisite Tl6(Fe,Ni,Cu)25S26Cl P m3m 4/m 3 2/m

Other Djerfisherite 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 Djerfisherite :
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.FC.05





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