AM_Lawsonite_13 Formula: Ca (Al1.94 Fe.06) Si2 O10 D4 Name: Lawsonite Unit cell: 5.8639 8.76442 13.099 90.0 90.0 90.0 , V=673.21 Space group: P21CN (33)

Meyer H W , Marion S , Sondergeld P , Carpenter M A , Knight K S , Redfern S A T , Dove M T , American Mineralogist , 86 (2001) p.566-577, Displacive components of the low-temperature phase transitions in lawsonite, T = 50 K