MetallurgyHard

Question

Which mineral has been named incorrectly ? 

Options

A.Bauxite : Al2O3.2H2O
B.Corundum   :   Al2O3
C.Cryolite  :  3NaF .AlF3
D.Feldspar :  Be3Al2Si6O18

Solution

(D) Feldspar is K2O.Al2O3.6SiO2. beryl is Be3Al2Si6O18.

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