1. The clay minerals represented are largely kaolinite, montmorillonite and illite . 2. The chlorite, muscovite, illite , cookeite, and kaolinite. 3. The focus of an illite crystallinity XRD plot is the main peak. 4. Literature articles will refer to a R1 ordered illite -smectite, for example. 5. The common clay minerals are montmorillonite or smectite, illite , and kaolinite or kaolin. 6. Illite is also called hydromica or hydromuscovite.7. In addition to montmorillonite and illite another common clay species that is sometimes dominant is kaolinite. 8. R1 ordered chlorite-smectite is known as corrensite, R1 illite -smectite is rectorite. 9. The transformation of smectite to illite produces silica, sodium, calcium, magnesium, iron and water. 10. Ammonium fixation occurs when ammonium pushes potassium ions from between the layers of clay such as illite or montmorillonite.
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