Citation: Moore, P. B.; Sen Gupta, P. K.; Le Page, Y. (1989). Magnetoplumbite, PbFe12O19: Refinement and lone-pair splitting Note: Symmetry constraints on U(i,j) for Fe5, O4 and O5 were incorrect, and likely were refined wrong. They have been replaced with their isotropic equivalents.. American Mineralogist, 74, pp. 1186-1194.