AM_Braunite_2
Formula: (Mn11.62 Fe2.38) Si O24
Name: Braunite
Unit cell: 9.431 9.431 37.774 90.0 90.0 90.0 , V=3359.76
Space group: I41/ACD (142)

de Villiers J P R , American Mineralogist , 65 (1980) p.756-765, The crystal structure of braunite II and its relation to bixbyite and braunite