Atomic Positional Parameters
O  4f 0.3062 0.3062 0.0000
Si 2a 0.0000 0.0000 0.0000

Reference
Ross et al. (1990) American Mineralogist 75 739-747

see also
Sinclair W and Ringwood AE (1978) Nature 272 714

Mineral Chemistry
Stishovite is a high-pressure form of silica formed at ~130 kbar and above 1200^oC. The paper by Sinclair and Ringwood describes a synthesis of stishovite. This mineral has been found in impact-metamorphosed sandstone at Meteor Crater in Arizona, USA. In the crystal structure, unlike other SiO₂ polymorphs, the silicons are octahedrally coordinated.

The CHIME figure shows silicons as yellow spheres, oxygens as red spheres.