抄録
The change with temperature in intensity of magnetization of ferromagnetic mineral grains separated from the igneous rocks was measured in a strong magnetic field by means of a magnetic balance. The intensity of saturation magnetization and the Curie point of ferromagnetic minerals of titanomagnetite series, which are commonly found in natural igneous rocks as the solid solution of TiFe2O4 and Fe3O4, were examined in taking their chemical and crystallographic properties into consideration. Linear relations between each two of the chemical composition, the lattice parameter, the Curie point and the intensity of saturation magnetization were found as the first approximation. Besides, it was found that there exist natural ferromagnetic minerals in ilmenite—hematite series having the peculiar type of their thereto-magnetic curve.
