Cu(Co,Ni)2S4
Cubic
Carrollite, a copper cobalt sulfide mineral, is extremely rare at Franklin and unknown from Sterling Hill. It was first found by Dr. E. A. J. Burke in 1983, who reported its composition to be Cu 20.0, Co 34.25, Ni 3.9, Fe 0.95, S 41.5, total = 100.6 wt. %. (pers. comm.). At Franklin, carrollite occurs as microscopic crystals, intergrown with sphalerite, bornite, and chalcopyrite.
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| Copyright © 1995 by Pete J. Dunn |
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