AM_Nontronite_1 Formula: Na.41 Fe2 Si4 O10.01 Name: Nontronite Unit cell: 5.277 9.14 9.6 90.0 90.0 90.0 , V=463.03 Space group: P1 (1)

Dainyak L G , Zviagina B B , Rusakov V S , Drits V A , European Journal of Mineralogy , 18 (2006) p.753-764, Interpretation of the nontonite-dehydroxylate Mossbauer spectrum using EFG calculations, Locality: Garfield, Washington, USA, Sample: Model 2