<報文>金屬鑛物相互の固溶及び離溶とその選鑛製錬上の意義に就いて

概要

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Most of the ore-forming sulphide and oxide minerals occur in mutual solid solutions at high temperatures. After cooling, however, some of them appear as minute spots, parallel or lattice-shaped lamellae, skeleton crystals, cell-formed membranes or small grains. Lattice intergrowth of ilmenite in magnetite, chalcocite or chalcopyrite in bornite, etc., minute spots of chalcopyrite in sphalerite, star-shaped skeleton crystals of sphalerite in chalcopyrite and many others are of very common occurrence. When such mixtures are heated up to certain temperatures, they dissolve one another to form homogeneous solid solutions, which remains as such after quenching at room temperatures. When gradually cooled, however, such artificial solid solutions separate into more than one minerals, intergrowing with one another. Some of the experimental results on these changes are stated and their significance in dressing and smelting is considered in this paper.
1951-10-03