Tsarasaotra

TS-1

TS-1

TS-1

TS-1

wt%

PX-1

PX-2

AM-1

AM-2

SiO₂

42.3

44.2

44.8

44.9

TiO₂

1.31

1.37

0.86

0.92

Al₂O₃

9.04

9.13

9.06

9.05

FeO*

16.0

16.8

16.3

16.6

MnO

0.57

0.50

0.56

0.53

MgO

7.93

8.32

8.84

8.62

CaO

10.7

11.4

11.4

11.5

Na₂O

1.58

1.66

1.56

1.61

K₂O

1.43

1.46

1.36

1.30

Total

90.8

94.8

94.7

95.0

Number of cations recalculated on the basis of 23 oxygens.

Si

6.70

6.76

6.81

6.82

Al^IV

1.32

1.23

1.18

1.17

Ti

-

0.01

0.01

0.01

Sum T

8.01

8.00

8.00

8.00

Al^VI

0.37

0.42

0.44

0.45

Ti

0.17

0.14

0.09

0.10

Fe³⁺

0.43

0.35

0.39

0.36

Mn

0.06

0.06

0.06

0.06

Mg

1.87

1.90

2.01

1.95

Fe²⁺

1.86

1.96

1.86

1.92

Sum C

4.77

4.84

4.85

4.85

Mn

0.01

0.01

0.01

0.01

Fe²⁺

-

-

-

-

Mg

-

-

-

-

Ca

1.82

1.88

1.86

1.88

Na

0.43

0.38

0.38

0.38

Sum B

2.26

2.26

2.24

2.26

Ca

-

-

-

-

Na

0.05

0.12

0.08

0.10

K

0.29

0.28

0.26

0.25

Sum A

0.34

0.40

0.35

0.35

Mg#

0.50

0.49

0.52

0.50

(Na + K)A

0.34

0.40

0.35

0.35