  We have used single crystal X-ray diffraction methods to establish the
crystal structures of a compound in the Pd-Mn-Si system and in the Pd-Mn-Ge
system. The title compounds have structures related to the Fe$_2$P structure
type and are ferromagnetic with Curie temperatures above the room temperature.
Density functional electronic structure calculations help to understand the
nature of the local moment ferromagnetism in these compounds. However neither
the electronic structure calculations nor the magnetic measurements provide any
evidence of half-metallic behavior.
