Sample No

MgO

Na₂O

K₂O

1

10.3

18.2

71.3

2

14.2

20.9

64.8

3

25.5

10.1

64.2

4

92.9

7.8

.2

5

81.4

13.7

4.7

6

75.4

21.6

2.8

7

71.7

25.0

3.1

8

65.0

27.8

7.1

9

55.8

28.4

15.7

10

60.3

27.2

12.3