AM_Akermanite_5 Formula: Ca2 Mg.96 Si2 O7 Name: Akermanite Unit cell: 7.8288 7.8288 5.0052 90.0 90.0 90.0 , V=306.77 Space group: P-421M (113)

Swainson I P , Dove M T , Schmahl W W , Putnis A , Physics and Chemistry of Minerals , 19 (1992) p.185-195, Neutron powder diffraction study of the akermanite-gehlenite, solid solution series, Sample: 100% Ak