Beidellite glauconite

Dickite, Beidellite, Glauconite, vermiculite, Loughlinite, Kulkeite,... 

Figure 14. Fe and A1 in octahedrally coordinated sites of illite, celadonite and glauconites. M-B = muscovite beidellite theoretical compositions Mo = montmorillonite (octahedral charge) Ce = celadonite open circles = illite triangles = glauconites dots = celadonites.

The cation population of the octahedral sheet of glauconite includes a wider range of values than is found for most other 2 1 clays, with possible exception of the beidellites and nontronites. The average for the 82 samples is 2.054 and 77% of the values are larger than 2.00. The values range from 1.94 to 2.31. Some of these high... 

Smectite group (montmorillonite, beidellite, nontronite, etc.) Silicatic rocks of either origin a) Incomplete leaching of silicates (feldspars, micas) due to restricted water drculation b) After deposition either by removal of potassium from micas or neoformation from solutions To kaolinite by subsequent leaching, to illite or glauconite by addition of potassium and iron, to chlorite Either residual or neoformation... 

Clay minerals group Attapulgitc Beidellite Bentonite Celadonite Dickite Glauconite HaUoysite Hydromuscorite lllite Kaoli-nite Metahalloysite Metakaohnite Montmorillonite Nacrite Natrontite Palygorskite SepioUte. 

Montmorillonite Montmorillonite Beidellite Nontronite Glauconite Usually not suitable because of swelling characteristics and presence of Na or Mg. Glauconite can be used if it has a low K content. 

Illites, montmorillonites, and beidellites containing principally octahedral aluminum give a broad band centered in the 3620 to 3660 cm" region, but in nontronite and glauconite,... 

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