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Glauconite interlayer cations

Table 5.53 lists the general classification of micas with their main compositional terms. Stoichiometry obeys the general formula XF2 3Z40io(OH,F)2, where X = interlayer cations, Y = octahedrally coordinated cations of the 2 1 mixed layer, and Z = tetrahedrally coordinated cations of the 2 1 mixed layer. It must be noted that several compositional terms are indeed solid mixtures of more elementary components. In particular, glauconite has a complex chemistry and an Al Si diadochy of 0.33 3.67. (R and R terms in table 5.53 identify generic divalent and trivalent cations, respectively.)... [Pg.323]

Fig.6. Variations of average interlayer cation total with average octahedral total for sixty-six analyzed glauconites and celadonites. Data divided into eight approximately equal groups. (After Tyler and Bailey, 1961.)... Fig.6. Variations of average interlayer cation total with average octahedral total for sixty-six analyzed glauconites and celadonites. Data divided into eight approximately equal groups. (After Tyler and Bailey, 1961.)...
Analysis No. 1 represents the only truly tetrasilic celadonite. The average value for Si in the 17 analyses is 3.83. Except for Nos. 17-19 variations are between 3.73 and 4.00. Octahedral occupancy is close to 2 for all celadonites, with an average of 2.05. Interlayer cations often number substantially less than 1.0 and average 0.81 with a low value of 0.38 (No. 14). This, of course, is typical also for glauconites and hydrous micas. ... [Pg.47]


See other pages where Glauconite interlayer cations is mentioned: [Pg.3]    [Pg.30]    [Pg.41]    [Pg.195]    [Pg.31]    [Pg.37]    [Pg.38]    [Pg.178]    [Pg.106]    [Pg.107]   
See also in sourсe #XX -- [ Pg.27 , Pg.28 , Pg.38 , Pg.39 ]




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