  We present the results of our comprehensive structural investigation
performed on single crystals of CePtIn4 grown from In flux in a platelet-like
morphology. They were found to crystalize in an orthorhombic structure having
space group Cmcm (no. 63) with the lattice parameters a = 4.52175 (15) {\AA}, b
= 16.7777 (5) {\AA}, and c = 7.3903 (2) {\AA}. The unit cell volume of such
crystals is slightly larger than that of previously reported needle-shaped
single crystals of CePtIn4. This feature seems to influence the low-temperature
physical properties of the compound, such as enhanced ordering temperature (TN
= 2.3 K versus 1.65 K, observed before) along with a sharp drop in the
electrical resistivity at TN (that was absent for the needle-like CePtIn4). In
addition to the experimental data, we present the results of our ab-initio
calculations of the electronic structure of CePtIn4 with the platelet-like
morphology.
