Table 6. Partial chemical composition (wt. percent) of disseminated monazite ore in dolostone marble and of monazite-hematite-apatite 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 Al2O3=0.04, K2O=0.24, and TiO2=0.03]
|
Constituent |
Disseminated monazite ore |
|
Monazite-hematite-apatite |
||
|
7B30-33A |
7B30-33B |
|
7B30-27 |
7B37-3 |
|
|
Al2O3 |
0.13 |
0.06 |
|
* |
0.32 |
|
1Fe2O3 |
15.7 |
9.86 |
|
18.6 |
6.58 |
|
MgO |
5.47 |
5.80 |
|
.03 |
.05 |
|
CaO |
16.79 |
29.38 |
|
22.39 |
33.58 |
|
K2O |
* |
* |
|
* |
* |
|
TiO2 |
* |
* |
|
.15 |
.05 |
|
MnO |
2.58 |
1.68 |
|
.02 |
.04 |
|
F |
2.18 |
7.98 |
|
4.38 |
8.98 |
|
BaO |
.05 |
.05 |
|
.02 |
1.45 |
|
Ce2O3 |
9.72 |
6.68 |
|
4.22 |
2.22 |
|
La2O3 |
7.04 |
4.10 |
|
2.46 |
1.04 |
|
Nd2O3 |
2.80 |
2.45 |
|
1.63 |
1.40 |
|
Nb2O5 |
.02 |
.01 |
|
.05 |
.01 |
|
SrO |
.08 |
.10 |
|
.10 |
.09 |
|
Total |
62.56 |
68.15 |
|
54.05 |
55.81 |
|
-O=F |
0.92 |
3.36 |
|
1.84 |
3.78 |
|
Total |
61.64 |
64.79 |
|
52.21 |
52.03 |
|
Total RE2O3 |
19.56 |
13.23 |
|
8.31 |
4.66 |
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Maintained by John Watson
Last updated 12.17.97