Table 12 Composition of amphibole from two samples of TGU Grt-Ph schist

Point

76

77

4

5

2

3

SiO₂

48.37

48.76

55.04

54.86

49.20

48.43

TiO₂

0.07

0.04

0.03

0.06

0.07

0.12

Al₂O₃

11.29

11.96

3.74

3.29

11.07

12.28

FeO

13.38

13.17

7.82

8.75

13.71

13.49

MnO

0.17

0.12

0.13

0.14

0.14

0.35

MgO

12.73

12.22

18.69

18.24

12.40

11.78

CaO

9.05

8.71

12.35

12.38

8.86

8.99

Na₂O

2.16

2.57

0.60

0.46

2.67

2.35

K₂O

0.23

0.15

0.07

0.06

0.19

0.34

Total

97.45

97.7

98.45

98.24

98.32

98.12

Si

6.995

7.010

7.668

7.694

7.057

6.961

Al^IV

1.005

0.990

0.332

0.306

0.943

1.039

Al^VI

0.919

1.037

0.282

0.237

0.929

1.041

Ti

0.008

0.004

0.003

0.006

0.007

0.013

Fe

1.618

1.583

0.911

1.026

1.645

1.622

Mn

0.021

0.015

0.015

0.017

0.017

0.043

Mg

2.744

2.619

3.881

3.813

2.652

2.525

Ca

1.402

1.342

1.843

1.860

1.362

1.385

Na

0.606

0.716

0.161

0.124

0.744

0.655

K

0.042

0.028

0.012

0.010

0.035

0.062

X_Fe

0.37

0.38

0.19

0.21

0.38

0.39