F2.25 Pb0.875 Th0.125 Soubeyroux J, Reau J, Matar S, Hagenmueller P, Lucat C Solid State Ionics 2 (1981) 215-229 Etude par diffraction de neutrons de la solution solide Pb1-x Thx F2+2x _cod_database_code 1008613 _database_code_amcsd 0016504 5.9570 5.9570 5.9570 90 90 90 Fm3m atom x y z occ Pb1 0 0 0 .875 Th1 0 0 0 .125 F1 .25 .25 .25 .73 F2 .5 .406 .406 .015 F3 .391 .391 .391 .027 F4 .293 .293 .293 .05