Kharaelakhite Mineral Data

General Kharaelakhite Information

Chemical Formula:

(Pt,Cu,Pb,Fe,Ni)9S8

Composition:

Molecular Weight = 880.29 gm

Iron 4.76 % Fe

Copper 18.05 % Cu

Nickel 1.67 % Ni

Platinum 11.08 % Pt

Lead 35.31 % Pb

Sulfur 29.14 % S

______

100.00 %

Empirical Formula:

Pt_0.5Cu_2.5Pb_1.5Fe²⁺_0.75Ni_0.25S₈

Environment:

In hydrothermal chalcopyrite ores.

IMA Status:

Approved IMA 1985

Locality:

From the Talnakh deposit, Noril'sk region, western Siberia, USSR. Link to MinDat.org Location Data.

Name Origin:

For the Kharaelakh Plateau, Noril'sk region, USSR.

Name Pronunciation:

Kharaelakhite + Pronunciation

Kharaelakhite Image

Images:

Kharaelakhite

Comments: B&W BSE polished section image of a kharaelakhite (Xar) reaction rim on cooperate (Cup) and braggite (Br).
Location: Komsolmol'skii mine, Talnakh Cu-Ni deposit, Norilsk district, Krasnoyarsk Territory, Siberia, Russia. Scale: Scale bar 20 µm.
© Diederik Visser

Kharaelakhite Crystallography

Axial Ratios:

a:b:c =1.1656:1:1.74

Cell Dimensions:

a = 9.713, b = 8.333, c = 14.5, Z = 6; V = 1,173.61 Den(Calc)= 7.47

Crystal System:

Orthorhombic - Dipyramidal H-M Symbol (2/m 2/m 2/m) Space Group: P mmm

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

By Intensity(I/I_o): 3.03(1), 1.854(0.8), 1.591(0.6),

Physical Properties of Kharaelakhite

Color:

Bronze brown.

Density:

7.78

Diaphaneity:

Opaque

Luster:

Metallic

Optical Properties of Kharaelakhite

Optical Data:

NCalc= 1.78 - from Gladstone-Dale relationship (KC = 0.1042) where Ncalc=Dcalc*KC+1
NCalc= 1.81 - from Gladstone-Dale relationship (KC = 0.1042) where Ncalc=Dmeas*KC+1

RL Anisotrophism:

Distinct, from pink-lilac to bluish.

RL Color:

Brownish lilac tint.

Calculated Properties of Kharaelakhite

Electron Density:

Bulk Density (Electron Density)=6.60 gm/cc
note: Specific Gravity of Kharaelakhite =7.47 gm/cc.

Fermion Index:

Fermion Index = 0.11
Boson Index = 0.89

Photoelectric:

PE_{Kharaelakhite}= 788.27 barns/electron
U=PE_{Kharaelakhite} x rElectron Density=5,204.14 barns/cc.

Radioactivity:

GRapi = 0 (Gamma Ray American Petroleum Institute Units)
Kharaelakhite is Not Radioactive

Kharaelakhite Classification

Dana Class:

02.07.05.01 (02)Sulfides - Including Selenides and Tellurides

(02.07)where Am Bn Xp, with (m+n):p=9:8

(02.07.05)Dana Group

02.07.05.01 Kharaelakhite (Pt,Cu,Pb,Fe,Ni)9S8 P mmm 2/m 2/m 2/m

Strunz Class:

02.BC.70 02 - SULFIDES and SULFOSALTS (sulfides, selenides, tellurides; arsenides, antimonides, bismuthides; sulfarsenites, sulf

02.B - Metal Sulfides, M:S > 1:1 (mainly 2:1)

02.BC -With Rh, Pd, Pt, etc.

02.BC.70 Kharaelakhite (Pt,Cu,Pb,Fe,Ni)9S8 P mmm 2/m 2/m 2/m

Other Kharaelakhite Information

References:

NAME( AntBidBlaNic1) PHYS. PROP.(Am.Min.,Vol.74,p1215,1989) OPTIC PROP.(AntBidBlaNic1)

See Also:

Links to other databases for Kharaelakhite :
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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Kharaelakhite

(Pt,Cu,Pb,Fe,Ni)9S8
Dana No: 02.07.05.01 Strunz No: 02.BC.70
Locality:

Notes:

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