AM_Periclase_4 Formula: Mg O Name: Periclase Unit cell: 4.233 4.233 4.233 90.0 90.0 90.0 , V=75.85 Space group: FM3M (225)

Hazen R M , American Mineralogist , 61 (1976) p.266-271, Effects of temperature and pressure on the cell dimension and X-ray temperature, factors of periclase, T = 450 C, P = 1 atm