Synthesis, crystal structure, and characterization of two bismuth phosphates Rb2CaBi2P4O15 and Rb3SrBiP4O14

Two new polyphosphates Rb2CaBi2P4O15 and Rb(3)SrBiP(4)O(14 )were synthesized through the conventional high-temperature solid-state reactions. Single crystal measurement indicates that Rb2CaBi2P4O15 crystallizes in the centrosymmetric space group P2(1)/c and Rb3SrBiP4O14 crystallizes in the noncentrosyrnmetric space group P2(1)2(1)2(1). Rb2CaBi2P4O15 consists of [CaO6], [BiO6], [BiO5], [P2O7] dimer and isolated [PO4] tetrahedron, while Rb3SrBiP4O14 consists of [BiO5], [SrO7] and [P2O7] dimer. They are both composed of [P2O7] dimer and the Bi-P2O7 ring. In addition, the synthesis, IR spectra, UV-vis-NIR diffuse reflectance spectroscopy data, thermal stability and theoretical calculation have been reported.

Automated summary

Two new polyphosphates, Rb2CaBi2P4O15 and Rb(3)SrBiP(4)O(14), were synthesized through high-temperature solid-state reactions. The crystals of Rb2CaBi2P4O15 and Rb3SrBiP4O14 were found to have different structures and compositions. The synthesis, spectroscopic properties, and theoretical calculations were also investigated.