AM_Aenigmatite_3 Formula: Mg5.92 Al.08 Na2 Si6 H2 O20 Name: Aenigmatite Unit cell: 10.2925 10.7052 8.8027 105.28 96.712 125.256 , V=718.08 Space group: P-1 (2)

Yang H , Konzett J , American Mineralogist , 85 (2000) p.259-262, High-pressure synthesis of Na2Mg6Si6O18(OH)2 - a new hydrous silicate phase, isostructural with aenigmatite