Two new isostructural intermetallic germanides, LiSrGe2 and LiBaGe2, were synthesized as single crystals from constituent elements in molten Na. They both crystallize in the space group Pnma (no. 62) with a = 7.142(1), b = 4.459(1), c = 11.550(2) Å, Z = 4, and a = 7.381(1), b = 4.617(1), c = 11.837(1) Å, Z = 4, for LiSrGe2 and LiBaGe2, respectively. They contain one-dimensional anionic germanide chains, ∞1[ G e2 ]3 -, running along the a-axis. The chains are in an unusual zigzag-like conformation, with weakly alternating Ge-Ge bond lengths of 2.475(1) and 2.498(1) Å, and 2.473(1) and 2.525(1) Å, for LiSrGe2 and LiBaGe2, respectively. Extended Hückel calculations suggest that LiSrGe2 is metallic: the Fermi level lies within bands having anti-bonding character. © 2008 Elsevier B.V. All rights reserved.
CITATION STYLE
Gon Park, D., Dong, Y., & DiSalvo, F. J. (2009). LiSrGe2 and LiBaGe2: One-dimensional chains of ∞1[ G e2 ]3 - in an unusual conformation. Journal of Alloys and Compounds, 470(1–2), 90–95. https://doi.org/10.1016/j.jallcom.2008.02.097
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