AM_Akermanite_2 Formula: Mg Si2 Ca2 O7 Name: Akermanite Unit cell: 8.82 7.34 9.13 90.0 115.1 90.0 , V=535.25 Space group: P121/N1 (14)

Merlini M , Gemmi M , Hanfland M , Crichton W , American Mineralogist , 94 (2009) p.704-709, High-pressure behavior of akermanite and gehlenite and phase stability, of the normal structures in melelites, Note: P = 15.7 GPa, Locality: synthetic