AM_Braunite_1
Formula: Mn7 Si O12
Name: Braunite
Unit cell: 9.408 9.408 18.668 90.0 90.0 90.0 , V=1652.31
Space group: I41/ACD (142)

Moore P B , Araki T , American Mineralogist , 61 (1976) p.1226-1240, Braunite: its structure and relationship to bixbyite, and some insights on the, genealogy of fluorite derivative structures