Distribution of rhenium in molybdenites from Japan

The rhenium contents of about 200 molybdenites have been determined by the neutron-activation or the catalytic spectrophotometric analyses. The present authors developed these methodes for the determination of the rhenium content of a very wide range, taking only a small amount of each sample. The data obtained show that 1) the rhenium content of molybdenite covers the range from 10-8 to 7 × 10-3 in atomic ratio of Re/Mo, 2) the rhenium contents...