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. 2009 Jul 6;106(28):11454–11459. doi: 10.1073/pnas.0901836106

Fig. 3.

Fig. 3.

Raman characterization of the CO/H2O mixture. The photomicrograph illustrates the CO/H2O mixture at 0.6 GPa after the loading. The Raman spectrum of the fluid phase shows that it is mainly composed of CO. The spectrum of the solid fraction presents a doublet as observed in the nitrogen clathrate hydrate (28), thus allowing its identification as a carbon monoxide clathrate hydrate.