  We report on the discovery and investigation of a new 218 heavy fermion
compound. Crystals have been synthesized from In-flux. Structurally, Ce2PtIn8
is located between the cubic CeIn3 and the more two-dimensional CeTIn5 (T =
transition metal) type of compounds. The weak anisotropy of the paramagnetic
susceptibility suggests rather 3D magnetic correlations. Specific heat,
electrical resistivity and magnetization measurements revealed that Ce2PtIn8
orders antiferromagnetically below Tn = 2.1 K. An order-to-order transition is
observed at Tm = 2 K. Similarities in the H - T phase diagram to other
CenTmIn3n+2m (T = Rh, Pt) compounds point to a pressure-induced quantum phase
transition (QPT) which, according to the tentative location of Ce2PtIn8 in the
recent proposed global phase diagram for QPT, would be of spin density wave
type.
