PbFI Weil M, Kubel F Acta Crystallographica E57 (2001) i80-i81 Matlockite-type PbFI _database_code_amcsd 0010361 4.2374 4.2374 8.800 90 90 90 *P4/nmm .25 -.25 0 atom x y z Uiso U(1,1) U(2,2) U(3,3) U(1,2) U(1,3) U(2,3) Pb .25 .25 .16392 .0225 .0178 .0178 .0318 0 0 0 I .25 .25 .66297 .0177 .0147 .0147 .0237 0 0 0 F .75 .25 0 .022 .017 .017 .032 0 0 0