Science. 1965 Apr 09;148(3667):232-4. doi: 10.1126/science.148.3667.232.
Science (New York, N.Y.)
B Kamb
PMID: 17780084 DOI: 10.1126/science.148.3667.232
The low-density cubic form of silica (impure), melanophlogite, has a clathrate-type structure that incorporates organic molecules, including long straight-chain hydrocarbons. The structure is analogous to that of the clathrate crystalline hydrates of composition 6X.46H(2)O or 8X.46H(2)O. This is the first known example of a silicate framework structure with the pentagonal dodecahedron as a framework element.