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Anukruti posted an Question

September 20, 2020 • 03:57 am

30 points

IIT JAM
Geology (GG)

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Rahul kumar Best Answer

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 mole % of NaAlSi3O8 is 0, but as you move towards the NaAlSi3O8, the mole% of NaAlSi3O8 is increasing. After one grid line the mole% of NaAlSi3O8 will be 20% then on second line mole% will be 40% and so on. In simple words since point X is farthest from NaAlSi3O8, so the mole% of NaAlSi3O8 will be least in rock X.
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Sajan sarthak

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

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 three end members.
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please explain in more detail..how it is 20,40
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