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Nature 389, 121-122 (11 September 1997) | doi:10.1038/38113

Materials science:  Percolation frustrated

Robert W. Cahn1

In the gold-mining industry, the 'richness' of gold ore extracted from a mine is assayed by cupellation, that is, reduction to metal in a heated carbon crucible using an appropriate flux, followed by weighing. This has been done for centuries.

  1. Robert W. Cahn is in the Department of Materials Science and Metallurgy, University of Cambridge, Pembroke Street, Cambridge CB2 3QZ, UK.
    e-mail: Email: rwc12@cam.ac.uk