AM_Periclase_95 Formula: (Mg.958 Fe.042) O Name: Periclase Unit cell: 4.2178 4.2178 4.2178 90.0 90.0 90.0 , V=75.03 Space group: FM-3M (225)

Boiocchi M , Caucia F , Merli M , Prella D , Ungaretti L , European Journal of Mineralogy , 13 (2001) p.871-881, Crystal-chemical reasons for the immiscibility of periclase and wustite, under lithospheric P,T conditions, Sample: Per.3363