AM_Vermiculite_5 Formula: Mg2.37 Fe.48 Al1.43 Si2.72 O16 C12 N2 H2 Name: Vermiculite Unit cell: 5.33 9.18 17.45 90.0 97.0 90.0 , V=847.45 Space group: C121 (5)

Kanamaru F , Vand V , American Mineralogist , 55 (1970) p.1550-1561, The crystal structure of a clay-organic complex of 6-amino hexanoic acid and, vermiculite