AM_Quartz_29 Formula: Si O2 Name: Quartz Unit cell: 5.01 5.01 5.47 90.0 90.0 120.0 , V=118.90 Space group: P3121 (152)

Arnold H , Zeitschrift fur Kristallographie , 117 (1962) p.467-469, Die struktur des hochquarzes, Note: sample is at T = 650 deg C, under the false assumption that it is twinned