Mg-MOF-74 unit cell (with H2 molecules)

This is a molecular model of several unit-cells of a crystalline porous material called Mg-MOF-74: http://www.pnas.org/content/106/49/20637.full
http://pubs.acs.org/doi/abs/10.1021/jp508249c
http://pubs.acs.org/doi/abs/10.1021/jp510253m

It is one of the best adsorbents for hydrogen and carbon dioxide to date.