Scanning Microscopy


Textural and structural features of Sardinian oxidized zinc (calamine) ores have been established by scanning electron microscopy and electron microprobe analysis, the elements analyzed being Zn, Pb, Ca and Fe. The surface composition of grains produced by comminution has also been determined, especially with reference to the presence of smithsonite and cerussite.

The methodological approach adopted has revealed intimate intergrowth of the mineral species present and contamination of the main mineral by inclusions of other species, which explains why it is so difficult to obtain good recoveries and high-quality concentrates by beneficiation processes.

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