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Transmission Electron Microscopy Study of the Morphology of Ices Composed of H<sub>2</sub>O, CO<sub>2</sub>, and CO on Refractory Grains

Transmission Electron Microscopy Study of the Morphology of Ices Composed of H<sub>2</sub>O, CO<sub>2</sub>, and CO on Refractory Grains

It has been implicitly assumed that ices on grains in molecular clouds and proto planetary disks are formed by homogeneous layers regardless of their composition or crystallinity. To verify this assumption, we observed the H2O deposition onto refractory substrates and the crystallization of amorphous ices (H2O, CO2, and CO) using …