AM_Bannisterite Formula: Mn11.06 Fe9.14 Mg.28 Zn.14 Si29.636 Al2.364 O104.33 Ca K.567 H58 Name: Bannisterite Unit cell: 22.286 16.386 24.575 90.0 94.355 90.0 , V=8948.35 Space group: A12/A1 (15)

Heaney P J , Post J E , Evans H T , Clays and Clay Minerals , 40 (1992) p.129-144, The crystal structure of bannisterite, Locality: Broken Hill, Australia