The mineral compositions are expressed as follows: C = chlorite; I = illite; S = smectite
; Na-F = albite; I/S = illite and smectite
mixed layer; K = kaolinite; K-F = kaolinite and potash feldspar mixed layer; Q = quartz crystal; I/C = illite and chlorite mixed layer; C/S = chlorite and smectite
According to the design criterion [8-10], the highest temperature in the engineered barrier system ought not to exceed 100[degrees]C because the smectite
may undergo a mineralogical alteration exposed to alkaline/salt pore fluids at high temperature [11-14].
(2015) studied the evolution of the mechanical properties of kaolinite-smectite mixtures and showed that the compression index, the swelling index and the friction angle were highly dependent on the smectite
amount; Hattab et al.
A small amount of smectite
is found in interlayers, denoting the presence of few swelling clay minerals.
* Note: K-Kaolinite, C-Chlorite, I-Illite, S-Smectite, I/S-illite smectite
mixed layer, %S-the content of smectite
in mixed-layer minerals of illite and smectite
, illite, chlorite, kaolinite, palygorskite, sepiolite and mixed-layer illite-smectite are the common minerals found in the geological deposits.
The release of NEK from illite, vermiculite and smectite
may increase the availability of K, while fixation of K ions by smectite
, vermiculite and illite decreases its availability (Najafi Ghiri et al.
Investigators who were trying to improve drug delivery using a type of clay--spray-dried smectite
clay particles, to be exact--discovered that it has "a unique ability to 'soak up' fat droplets in the gut," according to a statement from the University of South Australia, Adelaide.
During eogenesis, the Chichali and Lumshiwal formation have experienced mechanical compaction; chemical dissolution of the unstable grains, formation of smectite
and illite (Figs.
, illite, and chlorite mainly form under alkaline conditions, and kaolinite mainly forms under acidic conditions .