ChemInform Abstract: Synthesis and Characterization of the New Strontium Borogermanate Sr_3‐x/2B_2‐xGe_4+xO₁₄ (x = 0.32).

Abstract

Synthesis and Characterization of the New Strontium BorogermanateSr 3-x/2B2-xGe4+xO14 (x = 0.32). -Small, colorless crystals of the title compound are prepared by reaction of SrO, SrCO 3, GeO2, and H3BO3 in a NaF/KF flux (Pt crucible, 1100 C, 38 h). The new compound is characterized by single crystal XRD, Raman spectroscopy, and IR spectroscopy. It crystallizes in the trigonal space group P321 with Z = 1. The structure contains distorted SrO 8 cubes, GeO6 octahedra, GeO4 tetrahedra, and BO 4 tetrahedra. -(PETERMUELLER, B.; PETSCHNIG, L. L.; WURST, K.; HEYMANN, G.; HUPPERTZ*, H.; Inorg. Chem. 53 (2014) 18, 9722-9728, http://dx.

CsBxGe6–xO12 (x = 1): A Zeolite Sodalite-Type Borogermanate with a High Ge/B Ratio by Partial Boron Substitution

“…The mixed tetrahedral Ge 4+ /B 3+ positions are rare in BGOs. To the best of our knowledge, the only example is strontium borogermanate Sr 3−x/2 B 2−x Ge 4+x O 14 (x = 0.32), which was synthesized by high-temperature solid-state reaction and shows a Ca 3 Ga 2 Ge 4 O 14 -like structure, 23 while the well-crystalline CsB x Ge 6−x O 12 (x = 1) was made under solvothermal conditions. The partial replacement of Ge atoms in tetrahedral positions by a small number of B atoms leads to the highest Ge/B ratios in reported BGOs.…”