Nickel-skutterudite Mineral Data +

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General Nickel-skutterudite 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:	Ni0.75Co0.25As2.8
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
Nickel-skutterudite Image
Images:	Nickel-skutterudite 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
Nickel-skutterudite 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
X Ray Diffraction:	By Intensity(I/Io): 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 Nickel-skutterudite
Cleavage:	[001] Distinct, [111] Distinct, [011] Parting
Color:	Gray, Tin white, Gray.
Density:	6.5
Diaphaniety:	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 Nickel-skutterudite
RL Color:	Yellowish white, somewhat reddish in anisotropic zones.
RL Pleochroism:	Weak to distinct in some zones.
Calculated Properties of Nickel-skutterudite
Electron Density:	relectron=5.79 gm/cc note: rNickel-skutterudite =6.47 gm/cc.
Fermion Index	Fermion Index = 0.00185 Boson Index = 0.99815
Photoelectric:	PENickel-skutterudite = 65.38 barns/electron U=PENickel-skutterudite x relectron= 378.56 barns/cc.
Radioactivity:	GRapi = 0 (Gamma Ray American Petroleum Institute Units) Nickel-skutterudite is Not Radioactive
Nickel-skutterudite Classification
Dana Class:	2.12.17.2 (2)Sulfides - Including Selenides and Tellurides
	(2.12)where Am Bn Xp, with (m+n):p=1:2
	(2.12.17)Dana Group
	2.12.17.1 Skutterudite (Co,Ni)As3-x I m3 2/m 3
	2.12.17.2 Nickel-skutterudite (Ni,Co)As3-x I m3 2/m 3
	2.12.17.3 Kieftite CoSb3 I m3 2/m 3
Strunz Class:	II/D.29-20 II - Sulfides and sulphosalts
	II/D - Sulfides with metal: sulfur, selenium and tellurium < 1:1, Tellurides with Copper, Silver, Gold
	II/D.29 - Skutterudite - Iridisite series
	II/D.29-10 Skutterudite (Co,Ni)As3-x I m3 2/m 3
	II/D.29-20 Nickel-skutterudite (Ni,Co)As3-x I m3 2/m 3
	II/D.29-25 Kieftite CoSb3 I m3 2/m 3
	II/D.29-30 Iridisite* (Ir,Cu,Rh,Ni,Pt)S2 Unk Cubic
	II/D.29-40 Gaotaiite Ir3Te8 P a3 2/m 3
Other Nickel-skutterudite Information
References:	NAME( Dana7) PHYS. PROP.(Dana7) OPTIC PROP.(AntBidBlaNic1)
See Also:	Links to other databases for Nickel-skutterudite : 1 -Am. Min. Crystal Structure Database 2 -Athena 3 -Google Images 4 -Google Scholar 5 -MinDAT 6 -MinMax(Deutsch) 7 -MinMax(English) 8 -Mineralienatlas (Deutsch) 9 -QUT Mineral Atlas Search for Nickel-skutterudite using:   Web webmineral.com [ALTAVISTA] [AOL] [All-The-Web] [HotBot] [Ixquick] [MAMMA] [MSN.COM] [Netscape] [Scirus] [Teoma] [Wikipedia] [YAHOO] Visit our Advertisers for Nickel-skutterudite : AA Mineral Specimens B & L Fine Minerals Crystal Vaults Dan Weinrich Fine Minerals Dan Weinrich Auctions e-Rocks Auctions Excalibur Minerals Exceptional Minerals Fabre Minerals Greenside Minerals Heliodor John Betts Fine Minerals Mason's Minerals Mineral News Mineral of the Month Club MineralsWeb Fine Minerals Rockshop.cz T G Fine Minerals Wrights Rock Shop Translate Nickel-skutterudite Mineral Data : Ask about Nickel-skutterudite here : Ask-A-Mineralogist from the Mineralogical Society of America Mindat.org's Discussion Groups Original Rockhounds Discussion Group Rockhounds Discussion Group on Yahoo Groups Mineral Discussion Forum from Fabre Minerals - also available in Español Print or Cut-and-Paste your Nickel-skutterudite Specimen Label here : Nickel-skutterudite (Ni,Co)As3-x Dana No: 2.12.17.2 Strunz No: II/D.29-20 Locality:   Notes: