Morphological Effects on Illite as A Result of Potassium Depletion

Huff, Warren D.

doi:10.1346/ccmn.1972.0200506

Cited by 11 publications

(5 citation statements)

References 22 publications

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“…All models apparently apply. Layer weathering appears to be most common with small mica particles, whereas edge weathering is most common in larger particles (Scott, 1968;Huff, 1972;Norrish, 1973).…”

Section: Mechanisms Of K Releasementioning

confidence: 99%

Potassium Dynamics in Soils

Sparks

1987

Advances in Soil Science

337

192

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Section: Mechanisms Of K Releasementioning

confidence: 99%

Potassium Dynamics in Soils

Sparks

1987

Advances in Soil Science

337

192

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“…vermiculite, hydroxy‐interlayered vermiculite) (Lin et al , 2002). Laboratory experiments revealed the formation of expanding layers in illitic minerals releasing K (Scott & Reed, 1962; Huff, 1972; Robert, 1973). Partially vermiculitized illitic minerals may induce K‐fixation (Perkins & Tan, 1973), while hydroxy‐Al interlayering may change the K selectivity in the vermiculitic layers (Sparks & Huang, 1985).…”

Section: Introductionmentioning

confidence: 99%

Pedogenic alterations of illitic minerals represented by Radiocaesium Interception Potential in soils with different soil moisture regimes in humid Asia

Nakao

Funakawa

Watanabe

et al. 2009

European J Soil Science

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A frayed edge site can be a significant indicator of alterations in illitic minerals in soils evolving under different climates, because illitic minerals are known to enlarge the frayed edge site through vermiculitization. We investigated the relative abundance of this site in soil clays (<2 mm) using Radiocaesium Interception Potential (RIP) methodology, and determined the mineralogical factors controlling its amount (represented by RIP) for soils under ustic soil moisture regimes (northern Thailand, TH) and udic regimes (southwestern Japan, JP; East Kalimantan in Indonesia, ID) in humid Asia. We found three different correlations between RIP and mineralogical-or chemical-indices: positive (amount of illitic mineral and Cs-fixing capacity), negative (amount of kaolinite and hot-citrate extractable Al-Si) and no correlation (amount of DCB-oxides). The variable that correlated best with the logarithm of RIP in each region was Al cit -Si cit (JP), amount of illitic mineral (TH) and amount of kaolinite (ID). Under an ustic soil moisture regime in TH, there was little vermiculitization, as was evidenced by the direct correlation between the frayed edge site (or RIP) and the amount of illitic minerals and the very small Cs-fixing capacity. A distinct dry season restricts water leaching, which may reduce alteration in illitic minerals. For ID soils under an udic soil moisture regime, illitic minerals weather to form vermiculite, which is reflected in the enlargement of the frayed edge site. However, for JP soils, hydroxy-Al interlayering reduces the frayed edge site formed through vermiculitization. The release of hydroxy-Al polymers from vermiculitic layers can induce the re-exposure of the frayed edge site that can be progressive under a podzolization process.

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“…Some artificial weathering studies, however, have shown that micas have been directly transformed to smectite (Huff, 1972;Robert, 1973). Smectites weathered from micas are likely to be tetrahedrally substituted, approaching the beidellite end member in chemical composition (Ozkan and Ross, 1979).…”

Section: Introductionmentioning

confidence: 99%

High-Charge Smectite in Spanish “Raña” Soils

Aragoneses¹,

García‐González

1991

Clays and clay miner.

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Abstract--In a study of "rafia" soils of central Spain, hydroxy-interlayered 2:1 clay minerals were identified in the upper horizons and high-charge smectite in the lower horizons, with kaolinite the most abundant phyllosilicate. The high-charge smectite showed a basal spacing of 18/~ on Mg-saturation and glycerol solvation and 10 A on K-saturation and air-drying. It is concentrated in the coarse fractions and appears to be basically a beidellite in the fine-silt fractions and a montmorillonite in the clay fractions. Pre-existing illite was probably transformed into hydroxy-interlayered 2:1 clays in the surface horizons, whereas high-charge smectite formed in the deeper horizons. These minerals, which were apparently not stable in the existing soil conditions, were the first stage in the degradation process of illite. The stable mineral in these soil profiles was kaolinite.

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Morphological Effects on Illite as A Result of Potassium Depletion

Cited by 11 publications

References 22 publications

Potassium Dynamics in Soils

Potassium Dynamics in Soils

Pedogenic alterations of illitic minerals represented by Radiocaesium Interception Potential in soils with different soil moisture regimes in humid Asia

High-Charge Smectite in Spanish “Raña” Soils

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