Gujarat, India

Australia

Visakhapatnam India

Present work

[4]

[5]

[6]

Al₂O₃

84.58

79.53

15.0

47.75

53.4

SiO₂

5.08

6.54

5.0

3.30

3.46

TiO₂

4.52

4.58

4.5

3.14

3.89

Fe₂O₃

5.01

6.90

56.0

23.89

12.8

CaO

0.81

2.44

1.25

1.89