水熱条件下における珪灰石およびペクトライトのMgCl_2処理 : スチブンサイトおよび "加水タルク" の成因に関する実験的研究 (第1報)

概要

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In order to investigate the genesis of stevensite and "hydrated talc" experimentally, naturally occurring wollastonite and pectolite were treated hydrothermally with MgCl_2 solution for temperatures ranging from 100℃ to 200℃. The products were examined by means of X-ray diffraction, thermal analysis, infrared absorption spectroscopy and electron microscopy. Both wollastonite and pectolite alter to "hydrated talc" + chrysotile (200°-350℃) and then talc + chrysotile (≧400℃). Below 150℃ is formed the poorly crystallized silicate having a trioctahedral layer structure. the formation of stevensite can not be recognized under the present experimental conditions. Some considerations are made on the mechanism of the conversion of wollastonite and pectolite.
日本粘土学会の論文
1975-06-25