長週期粘土鉱物

概要

論文の詳細を見る
Long spacings as 29.,6 Å and 26.,6 Å are confirmed from certain clays from Japan, which have very complicated clay mineral compositions including kaolin minerals, chlorite, sepiolite and montmorillonite., Each long can be explained by a regular interstratification between two kinds of lattices selected from the following ones: montmorillonite lattice with the cell height of 15.,4 Å, a magnesian chlorite of 14.,5 Å, sepiolite with 12.,7 Å, and a new lattice of 14.,0 Å; the last is a regular interstratification of gibbsite and silicate (pyrophyllite unit) layers., This new lattice is proposed to explain the spacing and all other mineralogical properties of the clay., Thus the 29.,6 Å spacing agrees well with that of a regular mixed-layer lattice configurated by the 15.,4 Å and 14.,0 Å cells, and the 26.,6 Å spacing with a regular mixed-layer lattice by 12.,7 Å and 14.,5 Å cells., These long spacings are liable to be found in a clay in which several kinds of clay minerals co-exist, and such a complex clay tends to be found in special conditions, such as a boundary area between two different kinds of altered zones, and or an area affected by successive hydrothermal alteration.,
日本地質学会の論文
1955-05-25