Embryonic Halloysites in a Paddy Soil Derived from Valcanic Ash
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概要
- 論文の詳細を見る
Embryonic halloysites were found in the Ap horizon of a paddy soil derived from volcanic ash. These halloysites were nearly X-ray amorphous to poorly crystallized. They showed infrared absorption bands, more or less poorly defined but characteristic of halloysite, and appeared as "open" spherical to oval particles with diameters of 15 to 60 nm and as thinly spread "amorphous" materials. About half f halloysites were dissolved incongruently by 0.2 M oxalate-oxalic acid (pH 3.0) and congruently by hot M/3 sodium citrate. Embryonic halloysites were associated with goethite and ferrihydrite containing Al and Si respectively, and abundant diatoms, and considered to form from volcanic ash in a Si-rich environment.
- 日本粘土学会の論文
著者
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Wada Shin-ichiro
Faculty Of Agriculture Kyushu University
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Kakuto Yasuko
Faculty Of Agriculture Kyushu University
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Wada K
Kinki Univ.
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Wada Koji
Faculty Of Agriculture
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YAMAUCHI HIROKO
Faculty of Agriculture, Kyushu University
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Yamauchi Hiroko
Faculty Of Agriculture Kyushu University
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