AM_Periclase_39 Formula: Mg O Name: Periclase Unit cell: 4.078 4.078 4.078 90.0 90.0 90.0 , V=67.82 Space group: FM3M (225)

Jacobsen S D , Holl C M , Adams K A , Fischer R A , Martin E S , Bina C R , Lin J F , Prakapenka V B , Kubo A , Dera P , American Mineralogist , 93 (2008) p.1823-1828, Compression of single-crystal magnesium oxide to 118 GPa and a ruby pressure, gauge for helium pressure media, Note: P = 18.6 GPa using ruby-scale, Note: P = 18.9 GPa using MgO-scale