'Units' of allophane
can interact with each other and with other soil constituents, resulting in the formation of stable and porous aggregates (Wada 1977).
Weathered biotite (WB), i.e., partially vermiculitized biotite, adsorbed [sup.137]Cs far more tightly than did the other clay minerals (fresh biotite, illite, smectite, kaolinite, halloysite, allophane
, and imogolite).
The formation of crystals in volcanic ash is due to the abundance of short-range minerals among the main nanoscale materials, including imogolite (tubular nanotubes), allophane
(nanospheres), ferrihydrite, and iron-humic complexes .
In fact, it is a flat coating of a blue color caused by overflowing allophane
This transparent gel formation is employed as the method of confirmation in imogolite synthesis as well as the turbidity measurement, since other by-products such as allophane
do not form the gel [8, 9].
Suzuki, "Absorption properties and application of allophane
and imogolite," Journal of Clay Science Society of Japan, vol.
Yuan, "X-ray photoelectron spectroscopic characterization of silica springs allophane
," Clay Minerals, vol.
The key ingredient: allophane
, a micro-porous natural clay.
2003), whereas allophane
soil derived from volcanic ash is dispersed under high pH conditions (Wada 1985; Horikawa et al.