High-Temperature, High-Pressure Hydrothermal Synthesis, Crystal Structure, and Solid State NMR Spectroscopy of a New Vanadium(IV) Silicate: Rb2(VO)(Si4O10)·xH2O
A new lead(II) borosilicate, Pb6B2Si8O25 (1), has been synthesized by a high-temperature, high-pressure hydrothermal reaction at 480 °C and 990 bar. Its structure was determined by single-crystal X-ray diffraction. The...
The structure of the hydrothermally synthesized barium lead borate contains an unusual fundamental building block, 2Δ4□:〈Δ2□〉–〈3□〉Δ, which was also found in the high-pressure form of CaB2O4 synthesized at 900 °C under a pressure of 15–25 kbar.