Silicon Hanfland M, Schwarz U, Syassen K, Takemura K Physical Review Letters 82 (1999) 1197-1200 Crystal structure of the high-pressure phase silicon VI Locality: synthetic Sample: at P = 38.4 GPa Note: phase VI _database_code_amcsd 0015281 8.0242 4.7961 4.7760 90 90 90 Cmca atom x y z Si1 0 .173 .328 Si2 .218 0 0