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