Fig. 12
2.5 to 4.5 μm portion of the IR spectra measured for MgSiO3 samples at selected annealing temperatures chosen to represent those points in Fig. 10 where the relative proportions of Si2O5, SiO3 and SiO4 exhibit strong differences. The decrease in the broad band at ~3 μm indicates a decrease in hydration through the loss of interstitial H2O and bonded OH.
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