MagneticPropertyofaSpin-5/2TrigonalPrismaticasaModelforaMolecule-basedCompoundCs4Na7[Fe6（OH）3(A-ɑ-GeW9O34（OH）3)2]·30H2O

The magnetic susceptibility, high field magnetization, and specific heat of spin-5/2 trigonal prismatic "Fe6" model were investigated in terms of the Heisenberg model by algebraic method. The experimental results showed that the adequate magnetization description of the Heisenberg model were provided. The magnetization curve has four clear plateaus while the susceptibility exhibits typical antiferromagnetic feature. Two board peaks of the specific heat are observed at around 3 K and 15 K, while only a small sharp-peak at low field. Meanwhile, the magnetic susceptibility displays a sharp peak structure at low temperature, which is well consistent with experimental results.