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As you can see that the whole triangular plot is divided into 5 grids for each phase i.e. each grid represents 20% composition. For example on CaAl2Si2O8 and KAlSi3O8 line, the mol...

albite has least that is 20 percentage other two are same 40%

Ans: NaAlSi3O8 In the given triangular diagram: Mole % of NaAlSi3O8= 20% Mole % of CaAl2Si2O8= 40% Mole % of KAlSi3O8= 40% So, the mole percent of NaAlSi3O8 is lowest among all t...