AM_Grandreefite Formula: Pb2 S F2 O4 Name: Grandreefite Unit cell: 8.667 4.4419 14.242 90.0 107.418 90.0 , V=523.15 Space group: A12/A1 (15)

Kampf A R , American Mineralogist , 76 (1991) p.278-282, Grandreefite, Pb2F2SO4: Crystal structure and relationship to the lanthanide, oxide sulfates, Ln2O2SO4