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Encyclopedia Britannica - Main :: NEW-NUM |
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NICCOLITE , a mineral
pale copper-red colour, with metallic lustre, on the uneven fractured surfaces. It is opaque and brittle, and the streak is brownish-black, The specific gravity is 7.5, and the hardness 51. Small quantities of sulphur
cobalt are usually present, and sometimes the arsenic is largely replaced by antimony. Antimonial varieties are known as arite, and form a passage to the isomorphous species breithauptite (nickel antimonide). Niccolite occurs with ores of cobalt , silver and copper at Annaberg and Schneeberg in Saxony, at Sangerhausen and Mansfeld in Prussian Saxony and other localities; it has occasionally been found in Cornwall
Scotland . The original
Mount
The names niccolite (J. D. Dana , 1868) and nickeline (F. S. Beudant, 1832) refer to the presence of nickel (Lat. niccolum). Owing to its copper-red colour the mineral
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