AM_Quartz_18 Formula: Si O2 Name: Quartz Unit cell: 4.9965 4.9965 5.457 90.0 90.0 120.0 , V=117.98 Space group: P6222 (180)

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 = 848 K