AM_Quartz_27 Formula: Si O2 Name: Quartz Unit cell: 4.98 4.98 5.46 90.0 90.0 120.0 , V=117.27 Space group: P3221 (154)

Rosa A L , El-Barbary A A , Heggie M I , Briddon P R , Physics and Chemistry of Minerals , 32 (2005) p.323-331, Structural and thermodynamic properties of water related defects in alpha-quartz, Note: Hypothetical structure derived using density-functional theory