Constituents

AV. M

16

30

37

56

AM

AO

AC

SiO₂

56.55

53.5

53.535

52

50.271

51.4

49.61

49.9

Al₂O₃

12.878

13.47

12.86

14.16

12.63

14.85

16.01

16.2

Fe₂O₃

2.374

2.665

3.841

3.672

2.56

1.26

-

3

FeO

10.225

11.05

9.56

8.835

9.53

8.55

11.49*

7.8

MgO

4.588

5.875

6.99

6.62

9.464

6.36

7.84

6.3

CaO

7.14

8.747

8.342

8.07

11.02

12.16

11.32

9.8

Na₂O

2.43

1.876

1.59

2.278

1.85

2.19

2.76

2.8

K₂O

0.9

0.6

1

0.84

0.71

0.51

0.22

1.1

TiO₂

1.228

0.955

0.861

1.888

0.85

0.69

1.43

1.6

P₂O₅

0.284

0.345

0.28

0.437

0.361

0.14

-

0.3

MnO

0.18

0.136

0.17

0.223

0.05

0.53

0.18

0.17

H₂O

0.39

0.72

0.718

0.65

0.72

-

-

1

S

0.433

0.161

0.161

0.112

0.02

-

-

-

Total

99.6

100.1

100.05

99.785

100.03

98.64

100.86

99.97