beidellite

beidellite

[bī′de‚līt]
(mineralogy)
A clay mineral of the montmorillonite group in which Si4+has been replaced by Al3+and in which there is virtual absence of Mg or Fe replacing Al.
References in periodicals archive ?
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 (Bray 1937).
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).