Spinel

NK01

NK05

NK07

NK09

NK10

NK11

NK15

NK02

NK04

NK14

SiO₂ (wt%)

0.05

0.03

0.04

0.03

0.02

0.04

0.03

0.05

0.06

0.07

TiO₂

0.03

0.03

0.06

0.03

0.03

0.04

0.06

0.04

0.36

0.53

Al₂O₃

55.08

55.67

54.91

55.48

55.32

55.21

54.82

38.46

35.63

31.79

Cr₂O₃

11.64

11.3

11.49

11.47

11.94

11.32

12.43

27.99

27.15

29.85

Fe₂O₃

3.78

3.98

3.99

3.08

3.01

3.42

2.25

6.49

6.54

8.94

FeO

9.76

9.20

9.32

9.47

9.39

9.36

9.37

9.38

15.11

14.11

MnO

0.12

0.11

0.11

0.10

0.07

0.11

0.11

0.16

0.16

0.18

MgO

20.13

20.63

20.40

20.28

20.39

20.26

20.09

17.52

14.54

15.20

ZnO

0.08

-

-

-

-

-

0.06

-

0.24

-

NiO

0.36

0.43

0.34

0.33

0.28

0.41

0.37

0.18

0.27

0.26

Total

101.03

101.39

100.67

100.26

100.44

100.16

99.57

100.26

100.06

100.91

Mg#

73.16

74.20

73.80

74.70

75.07

74.38

75.86

67.23

55.25

55.01

Cr#

12.42

11.99

12.31

12.18

12.65

12.09

13.21

32.81

33.82

38.65