AM_Silicon_7 Formula: Si Name: Silicon Unit cell: 4.737 4.502 2.55 90.0 90.0 90.0 , V=54.38 Space group: IMMA (74)

McMahon M I , Nelmes R J , Physical Review B , 47 (1993) p.8337-8340, New high-pressure phase of Si, Locality: synthetic, Sample: structure exists between 13 GPa to 18 GPa, Note: intermediate structure between those of Si II and Si V