ChemInform Abstract: Synthesis, Crystal Structure and Optical Properties of a New Lead Fluoride Borate with Isolated [B₉O₂₁]^15‐ Unit.

Abstract

Synthesis, Crystal Structure and Optical Properties of a New Lead Fluoride Borate with Isolated [B9O21] 15-Unit. -Pb8B9O21F is synthesized by solid state reaction of a stoichiometric mixture of PbO, PbF2, and H3BO3 in air (Pt crucible, 500°C, 48 h) and characterized by single crystal XRD and UV/VIS/NIR diffuse reflectance spectroscopy. The compound crystallizes in the trigonal space group R3c with Z = 6. The crystal structure contains isolated [B 9 O 21 ] 15anions composed of three BO 4 tetrahedra and six BO3 triangles. The Pb8B9O21F crystal exhibits an UV cutoff edge of about 276 nm. -(ZHAO, W.; PAN*, S.; HAN, J.; ZHOU, Z.; TIAN, X.; LI, J.; Inorg. Chem. Commun. 14 (2011) 4, 566-568, http://dx.