Aluminous clay formations on Mars typically contain kaolinite, montmorillonite, beidellite
, hydrous silica and, frequently, sulphates.
The uncured composition of claim 1, wherein the layered filler comprises at least one silicate selected from montmorillonite, nontronite, beidellite
, bentonite, volkonskoite, laponite, hectorite, saponite, sauconite, magadite, kenyaite, stevensite, vermiculite, halloysite, aluminate oxides, hydrotalcite and mixtures thereof.
powder (9A): MMT and beidellite, and single clay in ME-100 powder (10A), the fluorohectorite.
and ME-100 lead to identification of the main clay components (MMT and beidellite in C-[Na.
1994), ripidolite and beidellite
(Sondi and Pravdic 1996), and also the iron oxide goethite (Parfitt et al.
Bentonites are sedimentary rocks consisting clay minerals, such as montmorillonite (major constituent), beidellite
, saponite, nontronite, hectorite, and nonclay minerals (3).
Among expanding 2:1 layer silicates, vermiculite and beidellite
have a higher K fixation capacity than montmorillonite (Ross and Cline 1984).
The clay present is smectitic and probably beidellite
Badraoui and Bloom (1990) reported the occurrence of a high-charge Fe-rich beidellite
in the clay fraction of Vertisols and Mollisols from Morocco.
Mixtures of montmorillonite and beidellite
would be characterised by 2 distinct peaks at 1.
The clay content is [is greater than] 80%, with beidellite
representing [is greater than] 60% of the clay fraction (Robert et al.
Potassium in soils is primarily fixed by 2:1 type clays with expanding lattices (such as beidellite
and vermiculite) which then revert to non-expanding 2:1 minerals (Bajwa 1985).