Purification of aluminum and gold by levitation melting in ultra-high vacuumHiroto Osono, Hiroshi Maeta, Kazuyuki Fujii, Satoshi Inoue, Shuichi Mitoma and Takao KinoMatériaux & Techniques, 91 (2003) 8-10DOI: https://doi.org/10.1051/mattech/200391120008s