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The Lithium Fluoride Tetrafluoroborate Li 2 F[BF 4 ]
Author(s) -
Pilz Thomas,
Schleid Thomas,
Jansen Martin
Publication year - 2013
Publication title -
zeitschrift für anorganische und allgemeine chemie
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.354
H-Index - 66
eISSN - 1521-3749
pISSN - 0044-2313
DOI - 10.1002/zaac.201300525
Subject(s) - tetragonal crystal system , boron , crystallography , lithium (medication) , lithium borate , chemistry , cationic polymerization , fluoride , tetrafluoroborate , tetrahedron , fluorine , inorganic chemistry , cristobalite , crystal structure , materials science , borate glass , medicine , ionic liquid , quartz , organic chemistry , catalysis , endocrinology , composite material , biochemistry
Colorless Li 2 BF 5 (better: Li 2 F[BF 4 ]) was obtained by partial decomposition of Li[BF 4 ] in a closed silica ampoule. It crystallizes in the tetragonal space group I 4 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 (6 ×) and 139 pm (4 ×), 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.