THE YAMAGATA-BENTONITE AND ITS ORIGIN (I):ON BENTONITES AND THEIR RELATED CLAY MINERALS
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The author made a preliminary discussion which may be followed by a report of the researches on the above subject.The so-called bentonite and acid-clay (fuller's earth), at least those of Japanese origin, have quite many points in common each other, being similar in distribution and geological condition of occurrence, in chemical composition and concluded formula, etc.Arguing against the known results and conclusions, the author showed the very similar points mentioned, and he tried a further discussion to the effect that the natural bentonites might mainly be composed of both montmorillonite and beidellite or one of them, and that each of them should theoretically have a molecular formula equivalent to that of pyrophillite, which is now clearly distinguished from kaolinite minerals by the X-ray study. It seems, therefore, quite reasonable to conclude that the principal constituent of acid-clay might have the pyrophyllite structure too.In the end, the author arrived at this conclusion that is seems resonable to say that there remains much more yet to be studied, as well as in bentonite itself, in both. K. Kobayashi's formula of acid-clay and the new mineral "Kanbaraite" proposed by H. Isobe and T. Okazawa.The discussions were made according to the following heads: (1) Introduction, (2) Definition of bentonite, (3) Definition of acid-clay, (4) Chemical composition of bentonite, (5) Acidity of clay, (6) On the origin, (7) Specific density of acid-clay, (8) Empirical formula of acid-clay, (9) Empirical formula of bentonite, (10) Clay and its related minerals, (11) Crystal structure of bentonite, (12) Conclusion.
- 公益社団法人 日本セラミックス協会の論文
公益社団法人 日本セラミックス協会 | 論文
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