The clay minerals in two soil profiles of cinnamon soil in %iangshan district of Beijing were studied by chemical analysis, cation exchange capacity determination differential thermal analysis and %-ray diffraction. The results obtained are as follows: 1. The minerals in the clay fraction are composed of illite, strongly hydrated illite, illite-montmorillonite interstratified mineral, hydrobiotite and vermiculite. 2. The transformation sequences of clay minerals in cinnamon are supposed as follow.
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陈佐忠.北京香山地区褐土粘土矿物的研究[J].土壤学报,1979,16(4):387-396. Chen Zuo-zhong. STUDY ON THE CLAY MINERALS OF CINNAMON SOIL IN XIANGSHAN DISTRICT OF BEIJING[J]. Acta Pedologica Sinica,1979,16(4):387-396.