AM_Brewsterite-Ba Formula: Si5.85 Al2.15 Sr.4 Ba.55 K.01 O21 H10 Name: Brewsterite-Ba Unit cell: 6.779 17.53 7.75 89.98 94.49 90.13 , V=918.15 Space group: P-1 (2)

Akizuki M , Kudoh Y , Kuribayashi T , American Mineralogist , 81 (1996) p.1501-1506, Crystal structures of the {011}, {610}, and {010} growth sectors in brewsterite, Sample: {610} sector