Experiments were carried out on the quasi-binary system, Fe2SiO4-Mg2SiO4, at 1050 to 1280C. It was found that the interdiffusion coefficient, for a given temperature and O partial pressure (table 91) increased almost exponenrially with the x-value.
A.Nakamura, H.Schmalzried: Berichte der Bunsengesellschaft fur Physikalische Chemie, 1984, 88[2], 140-5
Table 91
Interdiffusion Data for (FexMg1-x)2SiO4
Temperature (C ) | log[PO2(bar)] | x | D (cm2/s) |
1050 | -11.223 | 0.1 | 3.70 x 10-13 |
1050 | -11.223 | 0.2 | 5.40 x 10-13 |
1050 | -11.223 | 0.3 | 8.30 x 10-13 |
1050 | -11.223 | 0.4 | 1.28 x 10-12 |
1050 | -11.223 | 0.5 | 1.91 x 10-12 |
1050 | -11.223 | 0.6 | 2.81 x 10-12 |
1050 | -11.223 | 0.7 | 4.54 x 10-12 |
1050 | -11.223 | 0.8 | 7.09 x 10-12 |
1130 | -9.94 | 0.1 | 1.66 x 10-12 |
1130 | -9.94 | 0.2 | 2.63 x 10-12 |
1130 | -9.94 | 0.3 | 3.95 x 10-12 |
1130 | -9.94 | 0.4 | 6.24 x 10-12 |
1130 | -9.94 | 0.5 | 9.30 x 10-12 |
1130 | -9.94 | 0.6 | 1.38 x 10-11 |
1130 | -9.94 | 0.7 | 2.03 x 10-11 |
1130 | -9.94 | 0.8 | 3.13 x 10-11 |
1130 | -9.94 | 0.9 | 4.85 x 10-11 |
1130 | -11.655 | 0.1 | 1.26 x 10-12 |
1130 | -11.655 | 0.2 | 1.82 x 10-12 |
1130 | -11.655 | 0.3 | 2.85 x 10-12 |
1130 | -11.655 | 0.4 | 4.26 x 10-12 |
1130 | -11.655 | 0.5 | 7.00 x 10-12 |
1130 | -11.655 | 0.6 | 9.82 x 10-12 |
continued
Table 91 (continued)
Interdiffusion Data for (FexMg1-x)2SiO4
Temperature (C ) | log[PO2(bar)] | x | D (cm2/s) |
1130 | -11.655 | 0.7 | 1.41 x 10-11 |
1130 | -11.655 | 0.8 | 2.28 x 10-11 |
1130 | -11.655 | 0.9 | 3.38 x 10-11 |
1130 | -11.885 | 0.1 | 8.20 x 10-13 |
1130 | -11.885 | 0.2 | 1.13 x 10-12 |
1130 | -11.885 | 0.3 | 1.65 x 10-12 |
1130 | -11.885 | 0.4 | 2.56 x 10-12 |
1130 | -11.885 | 0.5 | 3.71 x 10-12 |
1130 | -11.885 | 0.6 | 5.61 x 10-12 |
1130 | -11.885 | 0.7 | 8.59 x 10-12 |
1130 | -11.885 | 0.8 | 1.34 x 10-11 |
1130 | -11.885 | 0.9 | 1.85 x 10-11 |
1200 | -8.737 | 0.1 | 7.86 x 10-12 |
1200 | -8.737 | 0.2 | 1.23 x 10-11 |
1200 | -8.737 | 0.3 | 2.01 x 10-11 |
1200 | -8.737 | 0.4 | 3.31 x 10-11 |
1200 | -8.737 | 0.5 | 4.80 x 10-11 |
1200 | -8.737 | 0.6 | 7.98 x 10-11 |
1200 | -8.737 | 0.7 | 1.31 x 10-10 |
1200 | -9.655 | 0.1 | 4.67 x 10-12 |
1200 | -9.655 | 0.2 | 7.64 x 10-12 |
1200 | -9.655 | 0.3 | 1.23 x 10-11 |
1200 | -9.655 | 0.4 | 2.03 x 10-11 |
1200 | -9.655 | 0.5 | 3.27 x 10-11 |
1200 | -9.655 | 0.6 | 5.20 x 10-11 |
1200 | -9.655 | 0.7 | 8.12 x 10-11 |
1200 | -10.859 | 0.1 | 3.12 x 10-12 |
1200 | -10.859 | 0.2 | 4.68 x 10-12 |
1200 | -10.859 | 0.3 | 7.45 x 10-12 |
continued
Table 91 (continued)
Interdiffusion Data for (FexMg1-x)2SiO4
Temperature (C ) | log[PO2(bar)] | x | D (cm2/s) |
1200 | -10.859 | 0.4 | 1.23 x 10-11 |
1200 | -10.859 | 0.5 | 1.93 x 10-11 |
1200 | -10.859 | 0.6 | 3.03 x 10-11 |
1200 | -10.859 | 0.7 | 4.87 x 10-11 |
1280 | -7.918 | 0.1 | 1.91 x 10-11 |
1280 | -7.918 | 0.2 | 3.55 x 10-11 |
1280 | -7.918 | 0.3 | 6.94 x 10-11 |
1280 | -7.918 | 0.4 | 1.33 x 10-10 |
1280 | -7.918 | 0.5 | 2.37 x 10-10 |