1956 年 6 巻 21 号 p. 185-187
Fluorine is generally considered important in the formation of pyrophyllite deposits, but the available, published analytical data are still insufficient to confirm this.
The authors give the fluorine content of various rock samples from the pyrophyllite deposit of the Yonago mine, Nagano Prefecaure. They also give the distribution of some heavy metals in these samples.