AM_Vermiculite_3 Formula: Mg3 Si4 O12 N4 C12 Name: Vermiculite Unit cell: 5.33 9.18 17.12 90.0 97.0 90.0 , V=831.43 Space group: C121 (5)

Haase D J , Weiss E J , Steinfink H , American Mineralogist , 48 (1963) p.261-270, The crystal structure of a hexamethylene-diamine-vermiculite complex