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Dobbe R T M , Lustenhouwer W J , Zakrzewski M A , Goubitz K , Fraanje J , Schenk H , The Canadian Mineralogist , 32 (1994) p.179-183, Kieftite, CoSb3, a new member of the skutterudite group from Tunaberg, Sweden, Locality: Tunaberg, Sweden
Physical Properties of Kieftite
Cleavage:
None
Color:
Tin white.
Density:
7.2
Diaphaneity:
Opaque
Hardness:
5-5.5 - Apatite-Knife Blade
Luster:
Metallic
Streak:
gray
Calculated Properties of Kieftite
Electron Density:
Bulk Density (Electron Density)=6.47 gm/cc note: Specific Gravity of Kieftite =7.62 gm/cc.
Fermion Index:
Fermion Index = 0 Boson Index = 1
Photoelectric:
PEKieftite = 303.60 barns/electron U=PEKieftite x rElectron Density=1,963.41 barns/cc.
Radioactivity:
GRapi = 0 (Gamma Ray American Petroleum Institute Units) Kieftite is Not Radioactive
Kieftite Classification
Dana Class:
02.12.17.03(02)Sulfides - Including Selenides and Tellurides