Crystal growth and crystal structures of six novel phases in the Mn/As/O/Cl(Br) system, as well as magnetic properties of α-Mn3(AsO4)2

Chemical vapour transport reactions of in situ formed Mn3(AsO4)2 using Cl2 or Br2 as transport agents led to crystal growth of six phases structurally determined for the first time: α-Mn3(AsO4)2, β-Mn3(AsO4)2, Mn7(AsO4)4Cl2, Mn11(AsO4)7Cl, Mn11(AsO4)7Br and Mn5(AsO4)3Cl.