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 = 45.5 GPa Note: phase VI _database_code_amcsd 0015283 7.9200 4.7586 4.7361 90 90 90 Cmca atom x y z Si1 0 .173 .324 Si2 .224 0 0