Figure 1: Framework structures of three types of clathrasils.
From: New silica clathrate minerals that are isostructural with natural gas hydrates
The framework type codes9 are (a) MEP, (b) MTN and (c) DOH. The names of silica minerals having these framework types are (a) melanophlogite, (b) chibaite and (c) as yet unnamed. The names of isostructural hydrates are (a) structure I (sI), (b) structure II (sII) and (c) structure H (sH).
