AM_Akermanite_12
Formula: Ca2 Mg Si2 O7
Name: Akermanite
Unit cell: 7.7494 7.7494 4.9328 90.0 90.0 90.0 , V=296.23
Space group: P-421M (113)

Yang H , Hazen R M , Downs R T , Finger L W , Physics and Chemistry of Minerals , 24 (1997) p.510-519, Structural change associated with the incommensurate-normal phase transition, in akermanite, Ca2MgSi2O7, at high pressure, Sample: P = 3.79 GPa