title: Separation of the oxide and halide part in the oxohalide Fe3Te3O10Cl due to high Lewis acidity of the cations.
abstract: 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.
authors.affiliation: Department of Inorganic Chemistry, Stockholm University, S-106 91 Stockholm, Sweden.
authors.forename: Dong
authors.initials: D
authors.lastname: Zhang
authors.forename: Mats
authors.initials: M
authors.lastname: Johnsson
authors.forename: Helmuth
authors.initials: H
authors.lastname: Berger
authors.forename: Reinhard K
authors.initials: RK
authors.lastname: Kremer
authors.forename: Dirk
authors.initials: D
authors.lastname: Wulferding
authors.forename: Peter
authors.initials: P
authors.lastname: Lemmens