sample nb.

132

132

132

132

132

132

132

SiO₂ (wt%)

0.00

0.00

0.05

0.03

0.13

1.01

0.07

TiO₂

24.63

24.66

25.03

24.56

19.60

19.59

17.83

Al₂O₃

2.64

2.85

2.35

2.02

2.41

1.51

5.68

Cr₂O₃

0.07

0.21

0.11

0.17

0.50

0.05

0.00

FeO

65.52

63.68

65.83

65.83

67.46

69.58

67.68

MnO

0.74

0.83

0.74

0.86

0.76

2.33

0.64

MgO

3.93

4.51

3.57

3.28

4.02

1.43

4.13

CaO

0.24

0.09

0.06

0.13

0.11

0.22

0.00

Total

97.77

96.84

97.72

96.87

95.18

96.08

96.19

Ilmenite basis

Fe₂O₃ (calc.)

36.69

35.85

36.11

36.37

41.49

40.88

41.21

FeO (calc.)

32.51

31.42

33.34

33.11

30.13

32.80

29.60

Total (calc.)

101.44

100.43

101.34

100.51

99.14

99.82

99.16

Ulvospinel basis

Fe₂O₃ (calc.)

20.27

19.41

19.39

19.98

28.31

26.93

29.93

FeO (calc.)

47.28

46.21

48.38

47.86

41.98

45.35

39.75

Total (calc.)

99.80

98.78

99.67

98.87

97.82

98.42

98.03

Si (apfu)

0.000

0.001

0.014

0.008

0.037

0.303

0.021

Ti

5.343

5.374

5.457

5.418

4.346

4.400

3.704

Al

0.898

0.973

0.803

0.698

0.836

0.531

1.960

Cr

0.017

0.049

0.025

0.039

0.117

0.011

0.000

Fe³⁺

4.399

4.231

4.231

4.411

6.281

6.051

6.591

Fe²⁺

11.402

11.194

11.729

11.739

10.350

11.327

9.728

Mn

0.180

0.204

0.180

0.212

0.190

0.590

0.159

Mg

1.689

1.947

1.542

1.434

1.766

0.638

1.800

Ca

0.073

0.028

0.020

0.041

0.034

0.069

0.000

Usp (%)

68.09

68.64

69.59

68.89

55.90

59.46

48.54