Rhenium, atomic number 75, atomic weight 186,2 was discovered in Germany in 1925 by the 26-year-old chemist Ida Noddack, born Tacke (1896-1978). The metal proved to be a refractory metal with a melting point 3180 ºC-the highest melting... more
Rhenium, atomic number 75, atomic weight 186,2 was discovered in Germany in 1925 by the 26-year-old chemist Ida Noddack, born Tacke (1896-1978). The metal proved to be a refractory metal with a melting point 3180 ºC-the highest melting temperature after Tungsten, which has a melting point of 3380 ºC. Thus rhenium became a very useful metal for preparing high-melting alloys. It is produced mainly from molybdenite concentrates separated from chalcopyrite ores.
Mineralogical, electron microprobe analysis and laser ablation-inductively coupled plasma-mass spectrometry data from molybdenite within two porphyry copper deposits (Kalinovskoe and Birgilda) of the Birgilda-Tomino ore cluster (South... more
Mineralogical, electron microprobe analysis and laser ablation-inductively coupled plasma-mass spectrometry data from molybdenite within two porphyry copper deposits (Kalinovskoe and Birgilda) of the Birgilda-Tomino ore cluster (South Urals) are presented. † The results provide evidence that molybdenites from these two sites have similar trace-element chemistry. Most trace elements (Si, Fe, Co, Cu, Zn, Ag, Sb, Te, Pb, Bi, Au, As and Se) form mineral inclusions within molybdenite. The Re contents in molybdenite vary from 8.7 ppm to 1.13 wt.%. The Re distribution within single molybdenite flakes is always extremely heterogeneous. It is argued that a temperature decrease favours the formation of Re-rich molybdenite. The high Re content of molybdenite observed points to a mantle-derived source.
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