Hydrogen molecules densly packed (IMAGE)
Caption
On the right is a representation of the 3D bulk phase of hydrogen, the H2-H2 distance is 3.76 Å, the hydrogen molecules are represented by red spheres. On the left a single layer of adsorbed hydrogen on silica, the intermolecular separation or H2-H2 distance is 2.9 Å, far below the bulk phase.
Credit
Max Planck Institute for Intelligent Systems
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Original content