In the 1st report, we mentioned the relation between the change of chemical composition and some physical, floatable properties, as an outline of the properties of pyrrhotite.
In this report entitled “Relation between the magnetic properties and the mineral deposits [1]”, we describe the results of relation between the chemical composition and magnetic susceptibility, the magnetism and the associated minerals and of measurements carried out at the Ashio Mine (Tochigi Prefecture) and the Chichibu Mine (Saitama Prefecture) in connection with the magnetic distributions.
The main results obtained are as follows;
(1) The results of measurement about the relation between the chemical composition and the magnetic susceptibility of natural pyrrhotite by powder method, have a tendency to coincide with the results of Jnza and Biltz who investigated the artificial pyrrhotite.
(2) But, the results which showed the strongest magnetism is 53. 66 atomic percent sulphur, and this mo re coincident with Ilaraldsen's results.
(3) in most cases, the strength of magnetism is related to the associated minerals.
(4) The magnetism is differed partly in some small pieces, but the most of them do not show much difference in magnetism.
(5) Generally, pyrrhotites at the Ashio deposit have a tendency of strong magnetism and those at Ghichibu deposit have weak one.
(6) And, each are body has a tendency to show the special range of magnetic susceptibility.
(7) At both deposits, the variation of magnetism with the difference of level height is comparativelydistinct.
(8) Above M tiond (3) to (7) showing the magnetism of pyrrhotite are relative to the temperatures of their crystallization.
(9) And we believe also that the variation of chemical composition can be said to be under the same circumstances as the magnetism described in (3) to (8).