AM_Maya Blue_1 Formula: Si8 Mg4 O28.174 C1.764 N.224 H7.92 Name: Maya Blue Unit cell: 12.72 17.886 5.254 90.0 90.0 90.0 , V=1195.34 Space group: PBMN (53)

Chiari G , Giustetto R , Ricchiardi G , European Journal of Mineralogy , 15 (2003) p.21-33, Crystal structure refinements of palygorskite and Maya Blue from molecular, modeling and powder synchrotron diffraction, Sample: Op+indigo