Petrographical Study of Japanese Coals lay the Microscopic Method with CH2I2 as Immersion Fluid

概要

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Cedar oil or glycerine has hitherto been used as the immersion fluid forthe microscopic examination of coal components by the oil immersion method. The reporters, however, have obtained the better results using more highly refractive fluid CH2I2 instead. This immersion fluid is quite easy to use and does not stain the sample. When this fluid is employed, the brightness of vitrinite changes itself in a wide range in accordance with the extent of its coalification, so that it is possible even to analyse the mixture ratio of mixed raw coals quantitatively. Moreover this new method makes it possible for us to observe minutely and distinctly the microscopic composition of Japanese tertiary coal, which has hitherto been next to impossible.Such observation has given a positive proof to the existing inference that the destruction of plant structures in it was more excessive during the period of peat formation than European paleozoic coal.
一般社団法人日本エネルギー学会の論文