  Magnetic charges, or magnetic monopoles, may form in the electronic structure
of magnetic materials where ions are deprived of symmetry with respect to
spatial inversion. Predicted in 2009, the strange magnetic, pseudoscalars have
recently been found different from zero in simulations of electronic structures
of some magnetically ordered, orthorhombic, lithium orthophosphates (LiMPO4).
We prove that magnetic charges in lithium orthophosphates diffract x-rays tuned
in energy to an atomic resonance, and to guide future experiments we calculate
appropriate unit-cell structure factors for monoclinic LiCoPO4 and orthorhombic
LiNiPO4.
