AM_Periclase_7
Formula: Mg O
Name: Periclase
Unit cell: 4.257 4.257 4.257 90.0 90.0 90.0 , V=77.15
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 = 915 C, P = 1 atm