Paramagnetic properties of several rare earth compounds with K3Ln2(NO3)9 structure

We present measurements of the paramagnetic susceptibilities of K3Pr2(NO3)9 and K3Sm2(NO3)9, cubic materials with rare earth sites having threefold rotational symmetry about (111). The rare earth environment resembles that of the Ln2Mg3(NO3)12·24H2O materials, and the magnetic susceptibilities show similarities but also interesting differences with Pr2Mg3(NO3)12·24H2O and Sm2Mg3(NO3)12·24H2O. Paramagnetic resonance experiments in K3La2(NO3)9 doped with these and several heavier lanthanides are also described and compared with theory.