AM_Guilleminite Formula: Ba U3 Se2 O17 H6 Name: Guilleminite Unit cell: 7.084 7.293 16.881 90.0 90.0 90.0 , V=872.13 Space group: P21NM (31)

Cooper M A , Hawthorne F C , The Canadian Mineralogist , 33 (1995) p.1103-1109, The crystal structure of guilleminite, a hydrated Ba-U-Se sheet structure