Djerfisherite Mineral Data

General Djerfisherite Information

Chemical Formula:

K6Na(Fe,Cu,Ni)25S26Cl

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 %

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

PDF 25-635

Djerfisherite Image

Images:

Djerfisherite

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

Cell Dimensions:

a = 10.41, Z = 1; V = 1,128.11 Den(Calc)= 3.68

Crystal System:

Isometric - HexoctahedralH-M Symbol (4/m 3 2/m) Space Group: P m3m

$Help on X Ray Diffraction:$ X Ray Diffraction:

By Intensity(I/I_o): 1.828(1), 2.985(0.7), 2.372(0.6),

Crystal Structure:

Mouse
drag1 - LMB Manipulate Structure
drag2 - RMB Resize/Rotate
Keyboard
S - Stereo Pair on/off
H - Help Screen
I - Data Info
A - Atoms On/Off
P - Polyhedra On/Off
B - Bonds On/Off
Help on Above

Zaccarini F , Thalhammer O A R , Princivalle F , Lenaz D , Stanley C J , Garuti G , The Canadian Mineralogist , 45 (2007) p.1201-1211, Djerfisherite in the Guli dunite complex, Polar Siberia: a primary or, metasomatic phase?, Note: Occupancy of Cl1 was changed from S1 to reproduce chemical formula, Locality: Guli dunite complex, Polar Siberia, Russia

Physical Properties of Djerfisherite

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

Optical Properties of Djerfisherite

RL Color:

Greenish yellow, close to khaki, to olive-drab.

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**
Relative Intensity	0%	50%	100%	150%	200%	250%	300%	350%	400%	450%
R

Calculated Properties of Djerfisherite

Electron Density:

Bulk Density (Electron Density)=3.52 gm/cc
note: Specific Gravity of Djerfisherite =3.68 gm/cc.

Fermion Index:

Fermion Index = 0.01
Boson Index = 0.99

Photoelectric:

PE_{Djerfisherite}= 21.17 barns/electron
U=PE_{Djerfisherite} x r_electron= 74.52 barns/cc.

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

Dana Class:

02.15.02.01 (02)Sulfides - Including Selenides and Tellurides

(02.15)(Chlorides)

(02.15.02)Djerfisherite Group

02.15.02.01 Djerfisherite K6Na(Fe,Cu,Ni)25S26Cl P m3m 4/m 3 2/m

02.15.02.02 Thalfenisite Tl6(Fe,Ni,Cu)25S26Cl P m3m 4/m 3 2/m

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

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

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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Ask about Djerfisherite here :
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Print or Cut-and-Paste your Djerfisherite Specimen Label here :

Djerfisherite

K6Na(Fe,Cu,Ni)25S26Cl
Dana No: 02.15.02.01 Strunz No: 02.FC.05
Locality:

Notes: