clay mineral


Also found in: Dictionary, Wikipedia.
Related to clay mineral: Smectite

clay mineral

[¦klā ¦min·rəl]
(mineralogy)
One of a group of finely crystalline, hydrous silicates with a two-or three-layer crystal structure; the major components of clay materials; the most common minerals belong to the kaolinite, montmorillonite, attapulgite, and illite groups.
References in periodicals archive ?
The qualitative and quantitative X-ray diffraction analysis established that its major minerals include detrital minerals like quartz and feldspars, with an average content of 45%, as well as clay minerals like kaolinite, andreattite and illite, with an average content of 37% (Table 1).
2002) during continuous clay mineral extraction (leaching method with 0.
Problems resulting from instability of Shale formations of oil and gas fields make well tight, pipes cased and also make formation eradication, mud loss, well deviation and other problems which explicitly and implicitly have effects on increasing drilling expenditure in addition, Clay minerals swelling near the wellbore make producing chemicals closed and formation destroyed.
1998) has cautioned against the unequivocal use of interstratified I-S as a geothermometer and has provided further evidence that factors such as pore fluid chemistry and rock to fluid ratios can have an important role in determining the reaction progress of clay mineral diagenesis.
Chlorite's properties allow for the study of clay mineral weathering in soils that may be more difficult to observe with other, more resistant, clay minerals.
Brown is a long-time member and past president of The Clay Minerals Society, where he met NASA scientists who later asked him for bentonite samples.
Nevertheless, it could be said that the net electrical forces between clay mineral layers were affected by surfactant percentage and type; anionic and cationic surfactants would result in an increase and a decrease in net repulsive forces, respectively (increased and decreased repulsive forces cause dispersion and flocculation of clay particles, respectively).
The pH-dependent or pH-sensitive component results from the increasing ionization as the pH of the soil system increases the presence of certain functional groups of organic matter and hydroxides that are associated with the broken edges of clay mineral plates and hydrous oxides of iron or aluminium.
2004) observed competitive adsorption between NOM and phosphate, which would indicate that the reactive hydroxyl groups of clay minerals are involved in DOC sorption.
Four chapters address the characteristics and thermodynamics of the interface, including the importance of chemical species and the kinetics of interfacial reactions; the interfacial processes in a model clay mineral system and transformations initiated by interfacial processes; the interfacial processes of real rock and soil/solution systems and their application to geological, soil science, and environmental problems; and the major analytical methods used in the study of the interfacial processes of rocks and soils.
Pravdic, "Electrokinetic Investigations of Clay Mineral Particles," Surfactant Sci.