The Lithium Fluoride Tetrafluoroborate Li2F[BF4]

作者：Pilz Thomas; Schleid Thomas; Jansen Martin^*

来源：Zeitschrift fur Anorganische und Allgemeine Chemie, 2013, 639(14): 2555-2557.

DOI：10.1002/zaac.201300525

• Fluorides
• Lithium
• Tetrafluoroborates
• Solid-state synthesis
• Crystal structure

Colorless Li2BF5 (better: Li2F[BF4]) was obtained by partial decomposition of Li[BF4] in a closed silica ampoule. It crystallizes in the tetragonal space group I4(1)/amd with the lattice parameters a = 512.8(2) pm and c = 1326.6(4) pm (c/a = 2.587). Lithium is sixfold and boron fourfold coordinated by fluorine at distances of about 210 pm (6x) and 139 pm (4x), respectively. A cristobalite-type cationic framework 3D-{[(F1)Li-4/2](+)} of vertex-sharing [(F1)Li-4](3+) tetrahedra embeds the isolated tetrahedral [B(F2)(4)](-) anions.

• 出版日期2013-11