AM_Akermanite_4
Formula: Ca2 Mg.71 Al.51 Si1.74 O7
Name: Akermanite
Unit cell: 7.7853 7.7853 5.0211 90.0 90.0 90.0 , V=304.33
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: 75% Ak