AM_Silicon_9 Formula: Si Name: Silicon Unit cell: 2.527 2.527 2.373 90.0 90.0 120.0 , V=13.12 Space group: P6/MMM (191)

Olijnyk H , Sikka S K , Holzapfel W B , Physics Letters , 103A (1984) p.137-140, Structural phase transitions in Si and Ge under pressures up to 50 GPa, Locality: synthetic, Sample: at P = 19.5 GPa, Note: phase V, structure stable between 16 GPa & 34 GPa