A new iron tellurite halide Fe(3)Te(3)O(10)Cl has been identified that crystallizes in the monoclinic space group P2(1)/c. The crystal structure comprises channels where the Cl ions and also the stereochemically active lone-pair electrons on Te(4+) are located. The Cl-atoms rather act as counterions than being part of the covalent/ionic network. The magnetic susceptibility indicates antiferromagnetic ordering below T(N) approximately 100 K with a marked splitting of the field cooled (fc) and the zero-field cooled (zfc) susceptibility at low magnetic fields; the splitting disappears at higher magnetic fields. Heat capacity measurements confirm the long-range ordering at below this temperature. Only moderate shifts are observed with Raman spectroscopy at the magnetic transition.