AM_Melilite_9 Formula: Ca1.87 Na.1 Sr.02 K.02 Mg.96 Al.09 Si1.98 O7 Name: Melilite Unit cell: 7.83 7.83 5.002 90.0 90.0 90.0 , V=306.67 Space group: P-421M (113)

Bindi L , Bonazzi P , Physics and Chemistry of Minerals , 32 (2005) p.89-96, Incommensurate-normal phase transition in natural melilite:, an in situ high-temperature X-ray single-crystal study