AM_Gehlenite_1 Formula: Ca2 Al2.06 Si.95 O7 Name: Gehlenite Unit cell: 7.685 7.685 5.0636 90.0 90.0 90.0 , V=299.05 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: O% Ak