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Table 3

IR Component feature positions and fractional areas for each tetrahedral species obtained from fits to the 10 μm band.

T(°C) SiO2 Si2O5 SiO3 Si2O7 SiO4
peak (μm) area peak (μm) area peak (μm) area peak (μm) area peak (μm) area
700 8.663 ± 0.015 0.009 9.635 ± 0.01 0.139 10.230 ± 0.02 0.257 10.920 ± 0.013 0.254 11.695 ± 0.01 0.299
650 8.743 ± 0.04 0.012 9.631 ± 0.03 0.174 11.148 ± 0.04 0.389 10.946 ± 0.04 0.246 11.654 ± 0.01 0.179
600 8.853 ± 0.2 0.025 9.748 ± 0.02 0.147 10.099 ± 0.04 0.409 10.923 ± 0.04 0.246 11.649 ± 0.008 0.171
550 8.717 ± 0.006 0.002 9.615 ± 0.07 0.135 10.149 ± 0.02 0.395 10.888 ± 0.04 0.261 11.630 ± 0.02 0.207
500 8.799 ± 0.003 0.0003 9.711 ± 0.1 0.147 10.158 ± 0.03 0.463 10.925 ± 0.03 0.229 11.630 ± 0.02 0.159
475 8.783 ± 0.02 0.003 9.462 ± 0.07 0.041 10.067 ± 0.02 0.492 10.946 ± 0.04 0.286 11.667 ± 0.02 0.178
450 8.771 ± 0.02 0.002 9.532 ± 0.03 0.059 10.071 ± 0.02 0.557 11.002 ± 0.05 0.265 11.657 ± 0.02 0.116
400 8.949 ± 0.009 0.002 9.465 ± 0.003 0.071 10.093 ± 0.003 0.676 11.236 ± 0.006 0.242 11.798 ± 0.006 0.008
300 8.739 ± 0.05 0.003 9.514 ± 0.005 0.179 10.143 ± 0.004 0.626 11.204 ± 0.006 0.177 11.693 ± 0.02 0.014
200 9.007 ± 0.007 0.009 9.559 ± 0.006 0.195 10.168 ± 0.007 0.594 11.226 ± 0.005 0.166 11.667 ± 0.007 0.036
UN 9.134 ± 0.04 0.005 9.573 ± 0.006 0.165 10.213 ± 0.007 0.546 11.179 ± 0.004 0.232 11.717 ± 0.01 0.052

Notes. The area for each component is expressed as a fraction of the total band area.

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