AM_Quartz_14 Formula: Si O2 Name: Quartz Unit cell: 4.9509 4.9509 5.4285 90.0 90.0 120.0 , V=115.23 Space group: P3221 (154)

Kihara K , European Journal of Mineralogy , 2 (1990) p.63-77, An X-ray study of the temperature dependence of the quartz structure, Sample: at T = 697 K