AM_Bredigite Formula: Ca13.467 Ba.293 Mg1.81 Mn.43 Si8 O32 Name: Bredigite Unit cell: 10.909 18.34 6.739 90.0 90.0 90.0 , V=1348.28 Space group: P2NN (34)

Moore P B , Araki T , American Mineralogist , 61 (1976) p.74-87, The crystal structure of bredigite and the genealogy of some alkaline earth, orthosilicates