Jena, S.K.; Dhawan, N.; Rath, S.S.; Rao, D.S.; Das, B.
(Separation And Purification Technology, 161, 2016: 104-111)
Nepheline syenite is an igneous rock, which contains around 5.4% of potassium oxide (K2O), but finely dispersed and, locked in the host matrix. The characterization studies reveal the presence of orthoclase, nepheline and ...