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For the three phyllosilicate s below , K 0.93 Na 0.04 Ca 0.03 (Mg 2.77 Fe 0.10 Ti 0.11 )(Si 2.88 Al 1.12 )O 10
For the three phyllosilicates below,
K0.93Na0.04Ca0.03(Mg2.77Fe0.10Ti0.11)(Si2.88Al1.12)O10(OH)2
(Na,Ca)0.33(Al,Mg)2(Si4O10) F1.25(OH)0.75nH2O
Ca0.1Na0.27K0.02(Al1.52 Fe3+0.19Mg0.22)(Si3.94Al0.06)O10(OH)2
(1) How much structural charges are derived from the T and O layer, respectively? (10 points)
(2) Identify the dioctahedral and trioctahedral phases. (5 points)
(3) For Al0.24Cax(Al3.7Mg0.3) (Si7.5Al0.5)O20(OH)4, calculate the value of x and the CEC.
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