Other Definitions
skutterudite (dict)
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SkutteruditeSkutterudite is cobalt arsenide and is listed in Dana's sulfide mineral group, even though it contains no sulfur. The mineral has variable amounts of nickel and iron substituting for cobalt with a general formula: (Co,Ni,Fe)As3. Some references give the arsenic a variable formula subscript of 2-3. High nickel varieties are referred tp as nickel-skutterudite. It is a hydrothermal ore mineral found in moderate to high temperature veins with other Ni-Co minerals. Associated minerals are arsenopyrite, native silver, erythrite, and annabergite. It is mined as an ore of cobalt and nickel with a by-product of arsenic. Skutterudite has a bright metallic luster, and is tin white or light steel gray in color with a black streak. The specific gravity is 6.5. Hardness is 5.5-6. Crystal structure is isometric with cube and octahedron forms similar to that of pyrite. The arsenic content gives a garlic odor when heated or crushed. It was discovered in 1845 and named after Skutterud in Norway. Notable occurances include Cobalt, Ontario, Canada, Skutterud, Norway, Franklin, New Jersey in the United States, and in other cobalt and nickel mining areas around the world. References See also
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