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![[Figure 2]](ie5007fig2mag.jpg)
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Figure 2
Characteristics of the XANES spectra. Spectra are offset for clarity. Standard solutions are not shown. (a) CO2-bearing solutions show a pre-edge peak not shown by the CO2-free solutions. (b) The pre-edge peak is identical for SFLINCS within a sample (small differences in amplitude are likely to be due to changes in self absorption with inclusion depth). (c) The pre-edge peak decreases in size and then disappears as temperature increases. (d) Cooling the fluid results in the appearance of the pre-edge feature at the same temperature as that at which it disappeared. The cause of the peak is therefore not affected by kinetic factors. (e) The pre-edge peak is of different magnitude in samples with different X(CO2): in KRBC14 [X(CO2) = 0.09] the peak has vanished by 423 K whereas in KRBC10 [X(CO2) = 0.13] an inflection is still visible. (f) The highest X(CO2) sample (KRBC11) shows a significantly different XANES spectra with only a small pre-edge peak. |
![[Figure 2]](ie5007fig2.jpg)
 | JOURNAL OF SYNCHROTRON RADIATION |
ISSN: 1600-5775
