Synthesis and crystal structure of triphosphate RbPrHP3O10

Crystals of RbPrHP3O10 have been grown by the flux technique and characterized by single-crystal X-ray diffraction. RbPrHP3O10 crystallizes in the triclinic P1-bar space group with lattice parameters: a=7.0655(5), b=7.7791(4), c=8.6828(6) A, α=74.074(3), β=74.270(3), γ=82.865(2)o, V=441.09(5) A3, Z=2. The crystal structure has been solved yielding a final R(F2)=0.0443 and Rw(F2)=0.1426 for 1955 independent reflections (Fo2>=2σ(Fo2)). The structure of RbPrHP3O10 consists of PrO8 polyhedra and P3O105- groups sharing oxygen atoms to form a two-dimensional framework; the PrO8 polyhedra form infinite chains by edge-sharing. Each Rb+ ion is bonded to 10 oxygen atoms, these ions are located between chains formed of (HP3O10)4-. The energies of the vibrational modes of the crystal were obtained from measurements of the infrared spectrum