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Table 9. Partial chemical composition (wt. percent) of high-Fe, REE, and fluorite banded ores of Bayan Obo.

[Analyst: P.H. Briggs. Analysis by inductively coupled plasma-atomic emission spectrometry (ICP-AES) for all oxides reported; SiO2, Na2O, P2O5, and CO2 were not determined.
Analysts: J. Sharkey and E. Brandt. Analysis by ion-selective electrode (ISE) for F.
*, below minimum detection level (MDL); MDL for K2O=0.24]

Constituent

7B30-28A

7B30-28B

7B30-37

7B31-14

Al2O3

0.25

0.17

0.13

0.09

1Fe2O3

24.31

37.17

45.75

35.7

MgO

.25

.25

.07

.10

CaO

8.40

3.92

1.32

7.70

K2O

*

*

*

*

TiO2

.47

.23

.07

.75

MnO

.04

.02

.02

.04

F

3.98

1.68

.54

4.38

BaO

4.24

2.79

3.91

.39

Ce2O3

11.24

5.50

1.17

9.14

La2O3

8.09

3.87

.46

6.33

Nd2O3

3.03

1.52

.40

2.33

Nb2O5

.14

.05

.01

.18

SrO

.15

.07

.03

.03

Total

64.59

57.24

53.88

67.16

-O=F

1.68

0.71

0.23

1.84

Total

62.91

56.53

53.65

65.32

Total RE2O3

22.36

10.89

2.03

17.80

1Total Fe as Fe2O3.

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Last updated 12.17.97