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Djerfisherite Mineral Data
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General Djerfisherite Information
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 Chemical Formula: |
K6Na(Fe,Cu,Ni)25S26Cl |
| Composition: |
Molecular Weight = 2,500.72 gm |
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Potassium 9.38 % K |
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Sodium 0.92 % Na |
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Iron 42.43 % Fe |
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Copper 10.16 % Cu |
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Nickel 2.35 % Ni |
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Sulfur 33.34 % S |
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Chlorine 1.42 % Cl |
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______ |
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100.00 % |
| Empirical Formula: |
K6NaFe2+19Cu4NiS26Cl |
| Environment: |
Hydrothermal Cu-Ni ores, in skarns, in pegmatites, in kimberlites and in a mafic alkalic diatreme. |
| IMA Status: |
Approved IMA 1966 |
| Locality: |
Coyote Peak, Humbolt County, California. Link to MinDat.org Location Data. |
| Name Origin: |
Named for Daniel Jerome Fisher (1896-1988), American mineralogist. |
| Name Pronunciation: |
Djerfisherite + Pronunciation  |
| Synonym: |
ICSD 200005 |
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PDF 25-635 |
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Djerfisherite Image |
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Images:
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Djerfisherite Crystallography
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| Cell Dimensions: |
a = 10.41, Z = 1; V = 1,128.11 Den(Calc)= 3.68 |
| Crystal System: |
Isometric - Hexoctahedral H-M Symbol (4/m 3 2/m) Space Group: P m3m |
| X Ray Diffraction: |
By Intensity(I/Io): 1.828(1), 2.985(0.7), 2.372(0.6), |
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Physical Properties of Djerfisherite
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| Color: |
Bronze brown, Greenish brown, Olive green. |
| Diaphaneity: |
Opaque |
| Habit: |
Granular - Generally occurs as anhedral to subhedral crystals in matrix. |
| Hardness: |
3.5 - Copper Penny |
| Luster: |
Sub Metallic |
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Optical Properties of Djerfisherite
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| RL Color: |
Greenish yellow, close to khaki, to olive-drab. |
| Reflectivity |
Standardized Intensity (100%) Reflection Spectra of Djerfisherite in Air
| λ |
R |
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∑ R(λ) |
| 400 nm |
17.50 |
 |
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| 420 nm |
18.30 |
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| 440 nm |
19.10 |
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| 460 nm |
20.00 |
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| 480 nm |
20.80 |
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| 500 nm |
21.60 |
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| 520 nm |
22.30 |
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| 540 nm |
22.90 |
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| 560 nm |
23.50 |
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| 580 nm |
24.00 |
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| 600 nm |
24.50 |
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| 620 nm |
24.90 |
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| 640 nm |
25.20 |
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| 660 nm |
25.50 |
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| 680 nm |
25.80 |
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| 700 nm |
25.90 |
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Calculated Relative Intensity Colors of Djerfisherite in Air
Relative
Intensity |
0% |
50% |
100% |
150% |
200% |
250% |
300% |
350% |
400% |
450% |
| R |
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Calculated Properties of Djerfisherite
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| Electron Density: |
Bulk Density (Electron Density)=3.52 gm/cc
note: Specific Gravity of Djerfisherite =3.68 gm/cc.
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| Fermion Index: |
Fermion Index = 0.01
Boson Index = 0.99 |
| Photoelectric: |
PEDjerfisherite = 21.17 barns/electron
U=PEDjerfisherite x relectron= 74.52 barns/cc.
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| Radioactivity: |
GRapi = 129.45 (Gamma Ray American Petroleum Institute Units)
Concentration of Djerfisherite per GRapi unit = 0.77 (%)
Estimated Radioactivity from Djerfisherite  - barely detectable
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Djerfisherite Classification
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| Dana Class: |
02.15.02.01 (02)Sulfides - Including Selenides and Tellurides |
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(02.15)(Chlorides) |
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(02.15.02)Djerfisherite Group |
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02.15.02.01 Djerfisherite K6Na(Fe,Cu,Ni)25S26Cl P m3m 4/m 3 2/m |
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02.15.02.02 Thalfenisite Tl6(Fe,Ni,Cu)25S26Cl P m3m 4/m 3 2/m |
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02.15.02.03 Owensite (Ba,Pb)6(Cu,Fe,Ni)25S27 P m3m 4/m 3 2/m |
| Strunz Class: |
02.FC.05 02 - SULFIDES and SULFOSALTS (sulfides, selenides, tellurides; arsenides, antimonides, bismuthides; sulfarsenites, sulf |
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02.F - Sulfides of Arsenic, Alkalies; Sulfides with Halide, Oxide, Hydroxide, H2O |
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02.FC -With Cl, Br, I (halide-sulfides) |
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02.FC.05 Djerfisherite K6Na(Fe,Cu,Ni)25S26Cl P m3m 4/m 3 2/m |
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02.FC.05 Owensite (Ba,Pb)6(Cu,Fe,Ni)25S27 P m3m 4/m 3 2/m |
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02.FC.05 Thalfenisite Tl6(Fe,Ni,Cu)25S26Cl P m3m 4/m 3 2/m |
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Other Djerfisherite 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 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
15 - WWW-MINCRYST
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Print or Cut-and-Paste your Djerfisherite Specimen Label here :
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Djerfisherite
K6Na(Fe,Cu,Ni)25S26Cl
Dana No: 02.15.02.01 Strunz No: 02.FC.05
Locality:
Notes:
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