Seifertite
From apm
Seifertite is polymorph of SiO2 with a very high density ( 4.294 g/ccm ) and probably hardness.
It's similar to stishovite in these aspects.
(TODO: find out if this polymorph is stable at ambient pressure (and room temperature). It certainly is sable as inclusion at room temperature.)
Seifertite might be almost as interesting as sthishovite as potenial base material for gemstone based metamaterials.
Only diminished by its slightly lower symmetry (orthorhombic instead of tetragonal).
There is a lead compound with the same structure as seifertit.
It's called scrutinyte (PbO2).
Related
- Stishovite – simlar density and high hardness (Mohs 8.5 to 9.5)
- Silicon
External links
- Wikipedia seifertite
- Structure of the unit cell in 3D: [1]
