Also of current interest is the impact of salinity on nucleation and growth of iron oxyhydroxides and on the structure of smectite clay materials.
22.
In contrast, beidellite is smectite with greater than 50 % tetrahedral charge originating from isomorphous substitution of Al for Si in the silica sheet.
23.
Both nickel-bearing talc and nickel dominant smectite occur at the type locality, Szklary, Zbkowice Zlskie County, Lower Silesia, Poland.
24.
These rocks contain amphibole, clay minerals such as illite, kaolinite and smectite, feldspar, plagioclase, potassium feldspar, pyroxene and quartz.
25.
The drying of the lake left deposits containing amphibole, illite, plagioclase feldspar, potassium feldspar, kaolinite, pyroxene, quartz and smectite.
26.
The neutral aluminium hydroxide sheets are found sandwiched between silicate sheets in important clay groups : the illite, kaolinite, and montmorillonite / smectite groups.
27.
These grains are called " glauconies " and consist of a mixture of mixed-layer clay minerals, such as smectite and glauconite mica.
28.
Clays in this member are rich in smectite and thus tend to swell when wet and dry to a crumbled surface that looks a bit like popcorn.
29.
Minerals formed by alteration processes include alunite, calcite, cristobalite, illite, jarosite, kaolinite, pyrophyllite, quartz, smectite, sulfur and tridymite.
30.
Analysis of soils consumed by wild birds show that they often prefer soils with high clay content, often with the smectite clay families being well-represented.
