  We have found that Ce3Pd20As6 crystallizes into a cubic C6Cr23-type
structure. Combination of electron probe microanalysis of the chemical
composition and Rietveld analysis of the powder X-ray diffraction pattern has
revealed an inhomogeneous atomic composition of variable stoichiometry. The
physical properties of Ce3Pd20As6 were investigated by measuring the
magnetization, electrical resistivity and specific heat. The 4f electrons of
Ce3+ ions are well localized but do not show phase transition down to 0.5 K.
The metallic electrical resistivity shows a weak Kondo screening. The residual
resistivity ratio is rather low probably due to the variable stoichiometry. The
magnetization curve and magnetic entropy suggest the Gamma_8 quartet
crystalline-electric-field ground state at least one of two Ce sites.
