Nickelskutterudite Mineral Data

General Nickelskutterudite Information

Chemical Formula:

(Ni,Co)As3-x

Composition:

Molecular Weight = 268.53 gm

Cobalt 5.49 % Co

Nickel 16.39 % Ni

Arsenic 78.12 % As

______

100.00 %

Empirical Formula:

Ni_0.75Co_0.25As_2.8

Environment:

Moderate temperature ore veins.

IMA Status:

Valid Species (Pre-IMA) 1892

Locality:

Schneeberg, Saxony, Germany. Link to MinDat.org Location Data.

Name Origin:

Named as the nickel-rich version of skutterudite.

Synonym:

Chloanthite

Dienerite

Nickel-skutterudite - Renamed Nickelskutterudite by Mineralogical Record, v39 (2008), p131

Nickelskutterudite Image

Images:

Nickelskutterudite

Comments: Gray, blocky crystals of nickel-skutterudite (chloanthite) with minor yellow pyrite.
Location: Gowganda, Ontario, Canada. Scale: Crystal size 3 mm.
© Tom Loomis / Dakota Matrix

Images:

Nickelskutterudite Dienerite

Comments: Aggregate of silver-gray nickelskutterudite cubes, some tarnished to a brassy color. Dienerite is now considered to be nickelskutterudite.
Location: Hasserode, Harz, Germany. Scale: See Image.
© Rruff Database

Nickelskutterudite Crystallography

Cell Dimensions:

a = 8.2, Z = 8; V = 551.37 Den(Calc)= 6.47

Crystal System:

Isometric - DiploidalH-M Symbol (2/m 3) Space Group: I m3

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

By Intensity(I/I_o): 2.61(1), 1.616(0.9), 1.841(0.9),2.2(0.8), 1.213(0.7), 1.41(0.7), 1.681(0.7),

Physical Properties of Nickelskutterudite

Cleavage:

{001} Distinct, {111} Distinct, {011} Parting

Color:

Gray, Tin white, Gray.

Density:

6.5

Diaphaneity:

Opaque

Fracture:

Brittle - Conchoidal - Very brittle fracture producing small, conchoidal fragments.

Habit:

Crystalline - Fine - Occurs as well-formed fine sized crystals.

Habit:

Granular - Generally occurs as anhedral to subhedral crystals in matrix.

Habit:

Massive - Uniformly indistinguishable crystals forming large masses.

Hardness:

5.5-6 - Knife Blade-Orthoclase

Luminescence:

Non-fluorescent.

Luster:

Metallic

Optical Properties of Nickelskutterudite

RL Color:

Yellowish white, somewhat reddish in anisotropic zones.

RL Pleochroism:

Weak to distinct in some zones.

Calculated Properties of Nickelskutterudite

Electron Density:

Bulk Density (Electron Density)=5.79 gm/cc
note: Specific Gravity of Nickelskutterudite =6.47 gm/cc.

Fermion Index:

Fermion Index = 0.0018522898
Boson Index = 0.9981477102

Photoelectric:

PE_{Nickelskutterudite}= 65.38 barns/electron
U=PE_{Nickelskutterudite} x rElectron Density= 378.56 barns/cc.

Radioactivity:

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

Nickelskutterudite Classification

Dana Class:

02.12.17.02 (02)Sulfides - Including Selenides and Tellurides

(02.12)where Am Bn Xp, with (m+n):p=1:2

(02.12.17)Skutterudite Series

02.12.17.01 Skutterudite (Co,Ni)As3-x I m3 2/m 3

02.12.17.02 Nickelskutterudite (Ni,Co)As3-x I m3 2/m 3

02.12.17.03 Kieftite CoSb3 I m3 2/m 3

02.12.17.04 Ferroskutterudite! (Fe,Co)As3 Im3 2/m 3

Strunz Class:

02.EC.05 02 - SULFIDES and SULFOSALTS (sulfides, selenides, tellurides; arsenides, antimonides, bismuthides; sulfarsenites, sulf

02.E - Metal Sulfides, M:S £ 1:2

02.EC -M:S = 1:>2

02.EC.05 Dienerite? Ni3As I 43d 4 3m

02.EC.05 Kieftite CoSb3 I m3 2/m 3

02.EC.05 Nickelskutterudite (Ni,Co)As3-x I m3 2/m 3

02.EC.05 Skutterudite (Co,Ni)As3-x I m3 2/m 3

02.EC.05 Ferroskutterudite! (Fe,Co)As3 Im3 2/m 3

Other Nickelskutterudite Information

References:

NAME( Dana7) PHYS. PROP.(Dana7) OPTIC PROP.(AntBidBlaNic1)

See Also:

Links to other databases for Nickelskutterudite :
1 - Am. Min. Crystal Structure Database
2 - Athena
3 - GeoScienceWorld
4 - Google Images
5 - Google Scholar
6 - Handbook of Mineralogy (MinSocAm)
7 - Handbook of Mineralogy (UofA)
8 - MinDAT
9 - Mineralienatlas (Deutsch)
10 - Online Mineral Museum
11 - QUT Mineral Atlas
12 - Ruff.Info

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Print or Cut-and-Paste your Nickelskutterudite Specimen Label here :

Nickelskutterudite

(Ni,Co)As3-x
Dana No: 02.12.17.02 Strunz No: 02.EC.05
Locality:

Notes: