Sample No

(Fe₂O₃ + MgO)

Na₂O

K₂O

1

46.9

10.8

42.2

2

42.7

13.9

43.3

3

77.9

3.0

19.0

4

97.0

2.9

0.08

5

92.9

5.2

1.8

6

81.0

16.7

2.2

7

78.4

19.1

2.3

8

82.9

13.5

3.4

9

77.8

14.2

7.9

10

81.7

12.5

5.6