Constituents (wt%)

OBC-TC2

OBC-TC4

OBC-TC6

IHC-TC2

IHC-TC4

IHC-TC6

SiO2

66.7

66.8

65.8

54.64

52.7

52.78

Al2O3

19.8

17.3

17

27.83

25.7

25.56

TiO2

7.22

9.94

11.3

7.18

10.8

12.54

K2O

0.67

0.453

0.4

0.72

0.712

0.771

CaO

0.3

0.298

0.231

0.85

0.611

0.647

Fe2O3

2.12

2.1

2.13

4.63

4.84

3.97

MgO

0.15

0.143

0.14

0.17

0.18

0.161

Na2O

0.382

0.291

0.338

0.11

0.12

0.13

V2O5

0.15

0.16

0.16

0.192

0.32

0.18

Cr2O3

0.004

0.004

0.003

0.02

0.023

0.053

Ga2O3

0

0

0

0.02

0.031

0.02

MnO

0.02

0.024

0.021

0.01

0.01

0.02

Sc2O3

0

0

0

0.001

0.001

0.001

CuO

0.015

0.016

0.014

0.02

0.015

0.028

ZnO

0

0

0

0.008

0

0

Bi2O3

0

0

0

0

0

0

L.O.I

2.4

2.4

2.41

3.58

3.86

3.12

Total

99.931

99.929

99.947

99.981

99.923

99.981