AM_Gehlenite Formula: Ca2 Al1.91 Mg.05 Fe.02 Si1.02 O7 Name: Gehlenite Unit cell: 7.716 7.716 5.089 90.0 90.0 90.0 , V=302.98 Space group: P-421M (113)

Louisnathan S J , The Canadian Mineralogist , 10 (1971) p.822-837, Refinement of the crystal structure of a natural gehlenite, Ca2Al(Al,Si)2O7, Locality: Crestmore, California, USA