AM_Nacrite_1 Formula: Al2 Si2 O9 H4 Name: Nacrite Unit cell: 8.91 5.144 14.593 90.0 100.5 90.0 , V=657.64 Space group: C1C1 (9)

Zhukhlistov A P , Crystallography Reports , 53 (2008) p.76-82, Crystal structure of nacrite from the electron diffraction data