AM_Maya Blue_3 Formula: Si12 Mg6 O43.3 C2.72 N.34 H27 Name: Maya Blue Unit cell: 12.709 17.896 15.775 90.0 90.0 90.0 , V=3587.87 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 (3 cells+indigo)