Grandreefite Kampf A R American Mineralogist 76 (1991) 278-282 Grandreefite, Pb2F2SO4: Crystal structure and relationship to the lanthanide oxide sulfates, Ln2O2SO4 _database_code_amcsd 0001350 8.667 4.4419 14.242 90 107.418 90 A2/a atom x y z Biso B(1,1) B(2,2) B(3,3) B(1,2) B(1,3) B(2,3) Pb .0785 .5089 .1548 0.0024 0.0075 .00052 0.0024 .00062 0.0003 S .25 .050 0 0.2 F .127 .967 .247 1.0 O1 .115 .252 .003 1.1 O2 .299 .858 .090 1.1