On the geological availability of germanium

@article{Frenzel2013OnTG,
  title={On the geological availability of germanium},
  author={M. Frenzel and M. P. Ketris and J. Gutzmer},
  journal={Mineralium Deposita},
  year={2013},
  volume={49},
  pages={471-486}
}
Based on a detailed statistical analysis of chemical data published in the scientific literature, estimates were made of the minimum amounts of recoverable Ge contained within sulphidic zinc ores and coals, given current processing technologies. It is expected that at least 119 kt (∼7 kt in zinc ores and ∼112 kt in coal) of recoverable germanium exist within proven reserves (at present stage of knowledge) at grades in excess of 100 ppm in sphalerite and 200 ppm in coal, while at least 440 kt… Expand
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