AM_Cronstedtite Formula: Si.5 Fe1.4 O4.001 H1.667 Name: Cronstedtite Unit cell: 3.16 3.16 21.25 90.0 90.0 120.0 , V=183.77 Space group: R113 (1)

Hendricks S B , American Mineralogist , 24 (1939) p.529-539, Random structures of layer minerals as illustrated by cronstedtite, (2FeO.Fe2O3.SiO2.2H2O). Possible iron content of kaolin