Copper (Cu) is a widely distributed and abundant element in combination, and is also found in the native state. The metal copper has a specific gravity of about 8·9, and melts at about 1,100°C. It is a comparatively soft but extremely tough metal, very ductile and malleable when pure, and, next to silver, the best conductor of electricity. These properties are a consequence of its cubic close-packed or face-centred cubic structure as described and figured on pp. 21–22. Figs. 19C and 7.
KeywordsMetallic Copper Native Gold Open Tube Native Copper Antimony Oxide
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