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Li 2 B 12 C 2 and LiB 13 C 2 : Colorless Boron‐Rich Boride Carbides of Lithium
Author(s) -
Vojteer Natascha,
Hillebrecht Harald
Publication year - 2005
Publication title -
angewandte chemie international edition
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 5.831
H-Index - 550
eISSN - 1521-3773
pISSN - 1433-7851
DOI - 10.1002/anie.200502325
Subject(s) - lithium (medication) , boride , boron , carbide , stoichiometry , crystal structure , materials science , boron carbide , crystallography , inorganic chemistry , mineralogy , metallurgy , chemistry , medicine , organic chemistry , endocrinology
Wade was right : Li 2 B 12 C 2 and LiB 13 C 2 , the first boron‐rich boride carbides of lithium, are (nearly) colorless and stoichiometrically composed. Their crystal structures are characterized by B 12 icosahedra and C 2 and CBC units, respectively, forming a three‐dimensional framework with Li cations in the voids. The charge distribution can be described by Wade's rules: (Li + ) 2 B 12 2− C 2 and (Li + )B 12 2− (CBC + ). The synthesis succeeded in molten metals at high temperatures.