AM_Boltwoodite_1 Formula: U Si K.56 Na.21 O7.27 H4.84 Name: Boltwoodite Unit cell: 7.0772 7.0597 6.6479 90.0 104.982 90.0 , V=320.86 Space group: P121/M1 (11)

Burns P C , The Canadian Mineralogist , 36 (1998) p.1069-1075, The structure of boltwoodite and implications of solid solution toward sodium, boltwoodite