  KV3Sb5 has recently attracted a considerable attention, due to its low
temperature superconducting properties, which are heralded by a charge density
wave. The apparent presence of a very weak magnetism does not result in long
range ordering. We propose a model compatible with a detectable internal
magnetic field with no evidence of magnetic long-range order. It invokes higher
order terms in the vanadium magnetization density compatible with the presence
of a "hidden order" of Dirac (polar) multipoles. The Dirac dipole, known as an
anapole or toroidal dipole, is one of a family of electronic multipoles visible
in x-ray and magnetic neutron diffraction while undetectable with standard
laboratory-based techniques. Two plausible hidden orders are studied with a
view to testing in future x-ray and neutron Bragg diffraction experiments
whether they are trustworthy. One candidate is magneto-electric and restricted
to the linear type, while the other candidate cannot show a magneto-electric
effect of any type. The latter hosts a vanadium entity that is both a true
scalar and magnetic, and its presence epitomizes an absence of loop currents.
Diffraction patterns for the two proposed hidden magnetic orders are distinctly
different, fortunately. Corresponding scattering amplitudes for resonant x-ray
and neutron Bragg diffraction are calculated with standard chemical and
magnetic symmetry tools, and atomic physics.
